diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 0eeb738..bc4198f 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -779,6 +779,10 @@
 # value)
 #dns_servers = 8.8.8.8,8.8.4.4
 
+# vnic_type to use when Launching instances with pre-configured ports.
+# Supported ports are: ['normal','direct','macvtap'] (string value)
+#port_vnic_type = <None>
+
 
 [network-feature-enabled]
 
diff --git a/requirements.txt b/requirements.txt
index 94c6fb0..ebb23c3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@
 netaddr>=0.7.12
 python-ceilometerclient>=1.0.6
 python-glanceclient>=0.15.0
-python-keystoneclient>=1.0.0
+python-keystoneclient>=1.1.0
 python-novaclient>=2.18.0
 python-neutronclient>=2.3.6,<3
 python-cinderclient>=1.1.0
@@ -25,4 +25,4 @@
 iso8601>=0.1.9
 fixtures>=0.3.14
 testscenarios>=0.4
-tempest-lib>=0.1.0
+tempest-lib>=0.2.0
diff --git a/tempest/api/baremetal/admin/base.py b/tempest/api/baremetal/admin/base.py
index 3b12b8e..1e9b308 100644
--- a/tempest/api/baremetal/admin/base.py
+++ b/tempest/api/baremetal/admin/base.py
@@ -11,11 +11,11 @@
 #    under the License.
 
 import functools
+from tempest_lib import exceptions as lib_exc
 
 from tempest import clients
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions as exc
 from tempest import test
 
 CONF = config.CONF
@@ -83,7 +83,7 @@
                 uuids = cls.created_objects[resource]
                 delete_method = getattr(cls.client, 'delete_%s' % resource)
                 for u in uuids:
-                    delete_method(u, ignore_errors=exc.NotFound)
+                    delete_method(u, ignore_errors=lib_exc.NotFound)
         finally:
             super(BaseBaremetalTest, cls).resource_cleanup()
 
diff --git a/tempest/api/baremetal/admin/test_chassis.py b/tempest/api/baremetal/admin/test_chassis.py
index 6f83412..1cf22ae 100644
--- a/tempest/api/baremetal/admin/test_chassis.py
+++ b/tempest/api/baremetal/admin/test_chassis.py
@@ -11,9 +11,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.baremetal.admin import base
 from tempest.common.utils import data_utils
-from tempest import exceptions as exc
 from tempest import test
 
 
@@ -63,7 +64,7 @@
         uuid = body['uuid']
 
         self.delete_chassis(uuid)
-        self.assertRaises(exc.NotFound, self.client.show_chassis, uuid)
+        self.assertRaises(lib_exc.NotFound, self.client.show_chassis, uuid)
 
     @test.attr(type='smoke')
     def test_update_chassis(self):
diff --git a/tempest/api/baremetal/admin/test_nodes.py b/tempest/api/baremetal/admin/test_nodes.py
index 41c12c6..96f4b43 100644
--- a/tempest/api/baremetal/admin/test_nodes.py
+++ b/tempest/api/baremetal/admin/test_nodes.py
@@ -11,11 +11,11 @@
 #    under the License.
 
 import six
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.baremetal.admin import base
 from tempest.common.utils import data_utils
 from tempest.common import waiters
-from tempest import exceptions as exc
 from tempest import test
 
 
@@ -62,7 +62,8 @@
 
         self.delete_node(node['uuid'])
 
-        self.assertRaises(exc.NotFound, self.client.show_node, node['uuid'])
+        self.assertRaises(lib_exc.NotFound, self.client.show_node,
+                          node['uuid'])
 
     @test.attr(type='smoke')
     def test_show_node(self):
diff --git a/tempest/api/baremetal/admin/test_ports.py b/tempest/api/baremetal/admin/test_ports.py
index 89447e0..0076dee 100644
--- a/tempest/api/baremetal/admin/test_ports.py
+++ b/tempest/api/baremetal/admin/test_ports.py
@@ -11,10 +11,10 @@
 #    under the License.
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.baremetal.admin import base
 from tempest.common.utils import data_utils
-from tempest import exceptions as exc
 from tempest import test
 
 
@@ -81,7 +81,8 @@
 
         self.delete_port(port['uuid'])
 
-        self.assertRaises(exc.NotFound, self.client.show_port, port['uuid'])
+        self.assertRaises(lib_exc.NotFound, self.client.show_port,
+                          port['uuid'])
 
     @test.attr(type='smoke')
     def test_show_port(self):
diff --git a/tempest/api/baremetal/admin/test_ports_negative.py b/tempest/api/baremetal/admin/test_ports_negative.py
index 8080eb6..dd19edc 100644
--- a/tempest/api/baremetal/admin/test_ports_negative.py
+++ b/tempest/api/baremetal/admin/test_ports_negative.py
@@ -10,6 +10,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.baremetal.admin import base
 from tempest.common.utils import data_utils
 from tempest import exceptions as exc
@@ -47,7 +49,7 @@
 
     @test.attr(type=['negative', 'smoke'])
     def test_show_port_nonexistent_uuid(self):
-        self.assertRaises(exc.NotFound, self.client.show_port,
+        self.assertRaises(lib_exc.NotFound, self.client.show_port,
                           data_utils.rand_uuid())
 
     @test.attr(type=['negative', 'smoke'])
@@ -62,7 +64,7 @@
         uuid = data_utils.rand_uuid()
 
         self.create_port(node_id=node_id, address=address, uuid=uuid)
-        self.assertRaises(exc.Conflict, self.create_port, node_id=node_id,
+        self.assertRaises(lib_exc.Conflict, self.create_port, node_id=node_id,
                           address=address, uuid=uuid)
 
     @test.attr(type=['negative', 'smoke'])
@@ -99,7 +101,7 @@
         node_id = self.node['uuid']
         address = data_utils.rand_mac_address()
         self.create_port(node_id=node_id, address=address)
-        self.assertRaises(exc.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.create_port, node_id=node_id,
                           address=address)
 
@@ -134,7 +136,7 @@
         patch = [{'path': '/extra/key',
                   'op': 'replace',
                   'value': 'new-value'}]
-        self.assertRaises(exc.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.update_port, port_id, patch)
 
     @test.attr(type=['negative', 'smoke'])
@@ -190,7 +192,7 @@
         patch = [{'path': '/address',
                   'op': 'replace',
                   'value': address1}]
-        self.assertRaises(exc.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.update_port, port_id, patch)
 
     @test.attr(type=['negative', 'smoke'])
diff --git a/tempest/api/compute/admin/test_agents.py b/tempest/api/compute/admin/test_agents.py
index 425ce13..b28b9e0 100644
--- a/tempest/api/compute/admin/test_agents.py
+++ b/tempest/api/compute/admin/test_agents.py
@@ -12,9 +12,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest.openstack.common import log
 from tempest import test
 
@@ -43,7 +44,7 @@
     def tearDown(self):
         try:
             self.client.delete_agent(self.agent_id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
         except Exception:
             LOG.exception('Exception raised deleting agent %s', self.agent_id)
diff --git a/tempest/api/compute/admin/test_aggregates.py b/tempest/api/compute/admin/test_aggregates.py
index a866ede..dd40145 100644
--- a/tempest/api/compute/admin/test_aggregates.py
+++ b/tempest/api/compute/admin/test_aggregates.py
@@ -13,10 +13,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common import tempest_fixtures as fixtures
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -45,7 +46,7 @@
         try:
             self.client.delete_aggregate(aggregate_id)
         # if aggregate not found, it depict it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     @test.attr(type='gate')
diff --git a/tempest/api/compute/admin/test_aggregates_negative.py b/tempest/api/compute/admin/test_aggregates_negative.py
index a450e5d..48f6f94 100644
--- a/tempest/api/compute/admin/test_aggregates_negative.py
+++ b/tempest/api/compute/admin/test_aggregates_negative.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common import tempest_fixtures as fixtures
 from tempest.common.utils import data_utils
@@ -43,7 +45,7 @@
     def test_aggregate_create_as_user(self):
         # Regular user is not allowed to create an aggregate.
         aggregate_name = data_utils.rand_name(self.aggregate_name_prefix)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.create_aggregate,
                           name=aggregate_name)
 
@@ -69,7 +71,7 @@
         aggregate = self.client.create_aggregate(name=aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
 
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.create_aggregate,
                           name=aggregate_name)
 
@@ -80,14 +82,14 @@
         aggregate = self.client.create_aggregate(name=aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.delete_aggregate,
                           aggregate['id'])
 
     @test.attr(type=['negative', 'gate'])
     def test_aggregate_list_as_user(self):
         # Regular user is not allowed to list aggregates.
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.list_aggregates)
 
     @test.attr(type=['negative', 'gate'])
@@ -97,20 +99,20 @@
         aggregate = self.client.create_aggregate(name=aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.get_aggregate,
                           aggregate['id'])
 
     @test.attr(type=['negative', 'gate'])
     def test_aggregate_delete_with_invalid_id(self):
         # Delete an aggregate with invalid id should raise exceptions.
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_aggregate, -1)
 
     @test.attr(type=['negative', 'gate'])
     def test_aggregate_get_details_with_invalid_id(self):
         # Get aggregate details with invalid id should raise exceptions.
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_aggregate, -1)
 
     @test.attr(type=['negative', 'gate'])
@@ -127,7 +129,7 @@
         aggregate = self.client.create_aggregate(name=aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
 
-        self.assertRaises(exceptions.NotFound, self.client.add_host,
+        self.assertRaises(lib_exc.NotFound, self.client.add_host,
                           aggregate['id'], non_exist_host)
 
     @test.attr(type=['negative', 'gate'])
@@ -137,7 +139,7 @@
         aggregate = self.client.create_aggregate(name=aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.add_host,
                           aggregate['id'], self.host)
 
@@ -151,7 +153,7 @@
         self.client.add_host(aggregate['id'], self.host)
         self.addCleanup(self.client.remove_host, aggregate['id'], self.host)
 
-        self.assertRaises(exceptions.Conflict, self.client.add_host,
+        self.assertRaises(lib_exc.Conflict, self.client.add_host,
                           aggregate['id'], self.host)
 
     @test.attr(type=['negative', 'gate'])
@@ -164,7 +166,7 @@
         self.client.add_host(aggregate['id'], self.host)
         self.addCleanup(self.client.remove_host, aggregate['id'], self.host)
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.remove_host,
                           aggregate['id'], self.host)
 
@@ -175,5 +177,5 @@
         aggregate = self.client.create_aggregate(name=aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
 
-        self.assertRaises(exceptions.NotFound, self.client.remove_host,
+        self.assertRaises(lib_exc.NotFound, self.client.remove_host,
                           aggregate['id'], non_exist_host)
diff --git a/tempest/api/compute/admin/test_availability_zone_negative.py b/tempest/api/compute/admin/test_availability_zone_negative.py
index d062b0c..546aa3b 100644
--- a/tempest/api/compute/admin/test_availability_zone_negative.py
+++ b/tempest/api/compute/admin/test_availability_zone_negative.py
@@ -12,8 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
-from tempest import exceptions
 from tempest import test
 
 
@@ -33,5 +34,5 @@
         # List of availability zones and available services with
         # non-administrator user
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_availability_zone_list_detail)
diff --git a/tempest/api/compute/admin/test_fixed_ips_negative.py b/tempest/api/compute/admin/test_fixed_ips_negative.py
index e7022db..bb5fa8c 100644
--- a/tempest/api/compute/admin/test_fixed_ips_negative.py
+++ b/tempest/api/compute/admin/test_fixed_ips_negative.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest import config
 from tempest import exceptions
@@ -43,14 +45,14 @@
     @test.attr(type=['negative', 'gate'])
     @test.services('network')
     def test_list_fixed_ip_details_with_non_admin_user(self):
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.get_fixed_ip_details, self.ip)
 
     @test.attr(type=['negative', 'gate'])
     @test.services('network')
     def test_set_reserve_with_non_admin_user(self):
         body = {"reserve": "None"}
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.reserve_fixed_ip,
                           self.ip, body)
 
@@ -58,7 +60,7 @@
     @test.services('network')
     def test_set_unreserve_with_non_admin_user(self):
         body = {"unreserve": "None"}
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.reserve_fixed_ip,
                           self.ip, body)
 
@@ -71,7 +73,7 @@
         # NOTE(eliqiao): in Juno, the exception is NotFound, but in master, we
         # change the error code to BadRequest, both exceptions should be
         # accepted by tempest
-        self.assertRaises((exceptions.NotFound, exceptions.BadRequest),
+        self.assertRaises((lib_exc.NotFound, exceptions.BadRequest),
                           self.client.reserve_fixed_ip,
                           "my.invalid.ip", body)
 
diff --git a/tempest/api/compute/admin/test_flavors_access_negative.py b/tempest/api/compute/admin/test_flavors_access_negative.py
index 4ba9eb2..5031432 100644
--- a/tempest/api/compute/admin/test_flavors_access_negative.py
+++ b/tempest/api/compute/admin/test_flavors_access_negative.py
@@ -13,11 +13,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import uuid
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -53,7 +53,7 @@
                                                new_flavor_id,
                                                is_public='True')
         self.addCleanup(self.client.delete_flavor, new_flavor['id'])
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.list_flavor_access,
                           new_flavor_id)
 
@@ -68,7 +68,7 @@
                                                new_flavor_id,
                                                is_public='False')
         self.addCleanup(self.client.delete_flavor, new_flavor['id'])
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.flavors_client.add_flavor_access,
                           new_flavor['id'],
                           self.tenant_id)
@@ -88,7 +88,7 @@
         self.client.add_flavor_access(new_flavor['id'], self.tenant_id)
         self.addCleanup(self.client.remove_flavor_access,
                         new_flavor['id'], self.tenant_id)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.flavors_client.remove_flavor_access,
                           new_flavor['id'],
                           self.tenant_id)
@@ -112,7 +112,7 @@
 
         # An exception should be raised when adding flavor access to the same
         # tenant
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.add_flavor_access,
                           new_flavor['id'],
                           self.tenant_id)
@@ -130,7 +130,7 @@
         self.addCleanup(self.client.delete_flavor, new_flavor['id'])
 
         # An exception should be raised when flavor access is not found
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.remove_flavor_access,
                           new_flavor['id'],
                           str(uuid.uuid4()))
diff --git a/tempest/api/compute/admin/test_flavors_extra_specs_negative.py b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
index 2663e25..e414973 100644
--- a/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
+++ b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -61,7 +63,7 @@
     def test_flavor_non_admin_set_keys(self):
         # Test to SET flavor extra spec as a user without admin privileges.
         specs = {"key1": "value1", "key2": "value2"}
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.flavors_client.set_flavor_extra_spec,
                           self.flavor['id'],
                           specs)
@@ -73,7 +75,7 @@
         body = self.client.set_flavor_extra_spec(
             self.flavor['id'], specs)
         self.assertEqual(body['key1'], 'value1')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.flavors_client.
                           update_flavor_extra_spec,
                           self.flavor['id'],
@@ -85,7 +87,7 @@
         specs = {"key1": "value1", "key2": "value2"}
         self.client.set_flavor_extra_spec(self.flavor['id'], specs)
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.flavors_client.unset_flavor_extra_spec,
                           self.flavor['id'],
                           'key1')
@@ -93,14 +95,14 @@
     @test.attr(type=['negative', 'gate'])
     def test_flavor_unset_nonexistent_key(self):
         nonexistent_key = data_utils.rand_name('flavor_key')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.unset_flavor_extra_spec,
                           self.flavor['id'],
                           nonexistent_key)
 
     @test.attr(type=['negative', 'gate'])
     def test_flavor_get_nonexistent_key(self):
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.flavors_client.get_flavor_extra_spec_with_key,
                           self.flavor['id'],
                           "nonexistent_key")
diff --git a/tempest/api/compute/admin/test_flavors_negative.py b/tempest/api/compute/admin/test_flavors_negative.py
index 86125fb..d1060c5 100644
--- a/tempest/api/compute/admin/test_flavors_negative.py
+++ b/tempest/api/compute/admin/test_flavors_negative.py
@@ -15,11 +15,12 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.api_schema.request.compute.v2 import flavors
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 
@@ -88,7 +89,7 @@
         flavor_name = data_utils.rand_name(self.flavor_name_prefix)
         new_flavor_id = str(uuid.uuid4())
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.create_flavor,
                           flavor_name, self.ram, self.vcpus, self.disk,
                           new_flavor_id, ephemeral=self.ephemeral,
@@ -97,7 +98,7 @@
     @test.attr(type=['negative', 'gate'])
     def test_delete_flavor_as_user(self):
         # only admin user can delete a flavor
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.user_client.delete_flavor,
                           self.flavor_ref_alt)
 
@@ -105,6 +106,5 @@
 @test.SimpleNegativeAutoTest
 class FlavorCreateNegativeTestJSON(base.BaseV2ComputeAdminTest,
                                    test.NegativeAutoTest):
-    _interface = 'json'
     _service = CONF.compute.catalog_type
     _schema = flavors.flavor_create
diff --git a/tempest/api/compute/admin/test_hosts_negative.py b/tempest/api/compute/admin/test_hosts_negative.py
index fc918a3..20429b1 100644
--- a/tempest/api/compute/admin/test_hosts_negative.py
+++ b/tempest/api/compute/admin/test_hosts_negative.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -38,20 +40,20 @@
 
     @test.attr(type=['negative', 'gate'])
     def test_list_hosts_with_non_admin_user(self):
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_hosts)
 
     @test.attr(type=['negative', 'gate'])
     def test_show_host_detail_with_nonexistent_hostname(self):
         nonexitent_hostname = data_utils.rand_name('rand_hostname')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.show_host_detail, nonexitent_hostname)
 
     @test.attr(type=['negative', 'gate'])
     def test_show_host_detail_with_non_admin_user(self):
         hostname = self._get_host_name()
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.show_host_detail,
                           hostname)
 
@@ -59,7 +61,7 @@
     def test_update_host_with_non_admin_user(self):
         hostname = self._get_host_name()
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.update_host,
                           hostname,
                           status='enable',
@@ -112,7 +114,7 @@
     def test_update_nonexistent_host(self):
         nonexitent_hostname = data_utils.rand_name('rand_hostname')
 
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.update_host,
                           nonexitent_hostname,
                           status='enable',
@@ -122,7 +124,7 @@
     def test_startup_nonexistent_host(self):
         nonexitent_hostname = data_utils.rand_name('rand_hostname')
 
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.startup_host,
                           nonexitent_hostname)
 
@@ -130,7 +132,7 @@
     def test_startup_host_with_non_admin_user(self):
         hostname = self._get_host_name()
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.startup_host,
                           hostname)
 
@@ -138,7 +140,7 @@
     def test_shutdown_nonexistent_host(self):
         nonexitent_hostname = data_utils.rand_name('rand_hostname')
 
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.shutdown_host,
                           nonexitent_hostname)
 
@@ -146,7 +148,7 @@
     def test_shutdown_host_with_non_admin_user(self):
         hostname = self._get_host_name()
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.shutdown_host,
                           hostname)
 
@@ -154,7 +156,7 @@
     def test_reboot_nonexistent_host(self):
         nonexitent_hostname = data_utils.rand_name('rand_hostname')
 
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.reboot_host,
                           nonexitent_hostname)
 
@@ -162,6 +164,6 @@
     def test_reboot_host_with_non_admin_user(self):
         hostname = self._get_host_name()
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.reboot_host,
                           hostname)
diff --git a/tempest/api/compute/admin/test_hypervisor_negative.py b/tempest/api/compute/admin/test_hypervisor_negative.py
index a137a61..a9c1cb1 100644
--- a/tempest/api/compute/admin/test_hypervisor_negative.py
+++ b/tempest/api/compute/admin/test_hypervisor_negative.py
@@ -13,11 +13,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import uuid
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -43,7 +43,7 @@
         nonexistent_hypervisor_id = str(uuid.uuid4())
 
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.client.get_hypervisor_show_details,
             nonexistent_hypervisor_id)
 
@@ -53,7 +53,7 @@
         self.assertTrue(len(hypers) > 0)
 
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_hypervisor_show_details,
             hypers[0]['id'])
 
@@ -63,7 +63,7 @@
         self.assertTrue(len(hypers) > 0)
 
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_hypervisor_servers,
             hypers[0]['id'])
 
@@ -72,14 +72,14 @@
         nonexistent_hypervisor_id = str(uuid.uuid4())
 
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.client.get_hypervisor_servers,
             nonexistent_hypervisor_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_hypervisor_stats_with_non_admin_user(self):
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_hypervisor_stats)
 
     @test.attr(type=['negative', 'gate'])
@@ -87,7 +87,7 @@
         nonexistent_hypervisor_id = str(uuid.uuid4())
 
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.client.get_hypervisor_uptime,
             nonexistent_hypervisor_id)
 
@@ -97,7 +97,7 @@
         self.assertTrue(len(hypers) > 0)
 
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_hypervisor_uptime,
             hypers[0]['id'])
 
@@ -105,14 +105,14 @@
     def test_get_hypervisor_list_with_non_admin_user(self):
         # List of hypervisor and available services with non admin user
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_hypervisor_list)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_hypervisor_list_details_with_non_admin_user(self):
         # List of hypervisor details and available services with non admin user
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.get_hypervisor_list_details)
 
     @test.attr(type=['negative', 'gate'])
@@ -120,7 +120,7 @@
         nonexistent_hypervisor_name = data_utils.rand_name('test_hypervisor')
 
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.client.search_hypervisor,
             nonexistent_hypervisor_name)
 
@@ -130,6 +130,6 @@
         self.assertTrue(len(hypers) > 0)
 
         self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.non_adm_client.search_hypervisor,
             hypers[0]['hypervisor_hostname'])
diff --git a/tempest/api/compute/admin/test_instance_usage_audit_log_negative.py b/tempest/api/compute/admin/test_instance_usage_audit_log_negative.py
index c4905d9..1e03bd0 100644
--- a/tempest/api/compute/admin/test_instance_usage_audit_log_negative.py
+++ b/tempest/api/compute/admin/test_instance_usage_audit_log_negative.py
@@ -16,6 +16,8 @@
 import datetime
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest import exceptions
 from tempest import test
@@ -31,11 +33,11 @@
     @test.attr(type=['negative', 'gate'])
     def test_instance_usage_audit_logs_with_nonadmin_user(self):
         # the instance_usage_audit_logs API just can be accessed by admin user
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.instance_usages_audit_log_client.
                           list_instance_usage_audit_logs)
         now = datetime.datetime.now()
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.instance_usages_audit_log_client.
                           get_instance_usage_audit_log,
                           urllib.quote(now.strftime("%Y-%m-%d %H:%M:%S")))
diff --git a/tempest/api/compute/admin/test_quotas_negative.py b/tempest/api/compute/admin/test_quotas_negative.py
index 7cefe90..2fb7be6 100644
--- a/tempest/api/compute/admin/test_quotas_negative.py
+++ b/tempest/api/compute/admin/test_quotas_negative.py
@@ -13,11 +13,11 @@
 #    under the License.
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -39,7 +39,7 @@
 
     @test.attr(type=['negative', 'gate'])
     def test_update_quota_normal_user(self):
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.client.update_quota_set,
                           self.demo_tenant_id,
                           ram=0)
@@ -59,7 +59,7 @@
 
         self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
                         cores=default_vcpu_quota)
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.create_test_server)
 
     @test.attr(type=['negative', 'gate'])
@@ -75,7 +75,7 @@
 
         self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
                         ram=default_mem_quota)
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.create_test_server)
 
     @test.attr(type=['negative', 'gate'])
@@ -90,7 +90,7 @@
                                          instances=instances_quota)
         self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
                         instances=default_instances_quota)
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.create_test_server)
 
     @decorators.skip_because(bug="1186354",
@@ -116,7 +116,7 @@
         # Check we cannot create anymore
         # A 403 Forbidden or 413 Overlimit (old behaviour) exception
         # will be raised when out of quota
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.sg_client.create_security_group,
                           "sg-overlimit", "sg-desc")
 
@@ -155,6 +155,6 @@
         # Check we cannot create SG rule anymore
         # A 403 Forbidden or 413 Overlimit (old behaviour) exception
         # will be raised when out of quota
-        self.assertRaises((exceptions.OverLimit, exceptions.Unauthorized),
+        self.assertRaises((lib_exc.OverLimit, lib_exc.Unauthorized),
                           self.sg_client.create_security_group_rule,
                           secgroup_id, ip_protocol, 1025, 1025)
diff --git a/tempest/api/compute/admin/test_security_group_default_rules.py b/tempest/api/compute/admin/test_security_group_default_rules.py
index 563d517..31103df 100644
--- a/tempest/api/compute/admin/test_security_group_default_rules.py
+++ b/tempest/api/compute/admin/test_security_group_default_rules.py
@@ -12,11 +12,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.api.compute import base
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -59,7 +59,7 @@
             rule = self._create_security_group_default_rules(ip_protocol)
             # Delete Security Group default rule
             self.adm_client.delete_security_group_default_rule(rule['id'])
-            self.assertRaises(exceptions.NotFound,
+            self.assertRaises(lib_exc.NotFound,
                               self.adm_client.get_security_group_default_rule,
                               rule['id'])
 
diff --git a/tempest/api/compute/admin/test_servers_negative.py b/tempest/api/compute/admin/test_servers_negative.py
index 0dddc76..0d4731d 100644
--- a/tempest/api/compute/admin/test_servers_negative.py
+++ b/tempest/api/compute/admin/test_servers_negative.py
@@ -14,6 +14,7 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.api.compute import base
@@ -50,7 +51,7 @@
         while True:
             try:
                 self.flavors_client.get_flavor_details(flavor_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 break
             flavor_id = data_utils.rand_int_id(start=1000)
         return flavor_id
@@ -71,7 +72,7 @@
                                                        ram, vcpus, disk,
                                                        flavor_id)
         self.addCleanup(self.flavors_client.delete_flavor, flavor_id)
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.client.resize,
                           self.servers[0]['id'],
                           flavor_ref['id'])
@@ -92,7 +93,7 @@
                                                        ram, vcpus, disk,
                                                        flavor_id)
         self.addCleanup(self.flavors_client.delete_flavor, flavor_id)
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.client.resize,
                           self.servers[0]['id'],
                           flavor_ref['id'])
@@ -111,20 +112,20 @@
 
     @test.attr(type=['negative', 'gate'])
     def test_reset_state_server_nonexistent_server(self):
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.reset_state, '999')
 
     @test.attr(type=['negative', 'gate'])
     def test_get_server_diagnostics_by_non_admin(self):
         # Non-admin user can not view server diagnostics according to policy
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_adm_client.get_server_diagnostics,
                           self.s1_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_migrate_non_existent_server(self):
         # migrate a non existent server
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.migrate_server,
                           str(uuid.uuid4()))
 
@@ -143,6 +144,6 @@
         self.assertEqual(202, resp.status)
         self.client.wait_for_server_status(server_id, 'SUSPENDED')
         # migrate an suspended server should fail
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.migrate_server,
                           server_id)
diff --git a/tempest/api/compute/admin/test_services_negative.py b/tempest/api/compute/admin/test_services_negative.py
index bb19a39..39d0ee1 100644
--- a/tempest/api/compute/admin/test_services_negative.py
+++ b/tempest/api/compute/admin/test_services_negative.py
@@ -12,8 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
-from tempest import exceptions
 from tempest import test
 
 
@@ -31,7 +32,7 @@
 
     @test.attr(type=['negative', 'gate'])
     def test_list_services_with_non_admin_user(self):
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_services)
 
     @test.attr(type=['negative', 'gate'])
diff --git a/tempest/api/compute/admin/test_simple_tenant_usage_negative.py b/tempest/api/compute/admin/test_simple_tenant_usage_negative.py
index 8c31d7c..b371f2d 100644
--- a/tempest/api/compute/admin/test_simple_tenant_usage_negative.py
+++ b/tempest/api/compute/admin/test_simple_tenant_usage_negative.py
@@ -14,6 +14,7 @@
 #    under the License.
 
 import datetime
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.compute import base
 from tempest import exceptions
@@ -42,7 +43,7 @@
         # Get usage for a specific tenant empty
         params = {'start': self.start,
                   'end': self.end}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.adm_client.get_tenant_usage,
                           '', params)
 
@@ -61,5 +62,5 @@
         params = {'start': self.start,
                   'end': self.end,
                   'detailed': int(bool(True))}
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.client.list_tenant_usages, params)
diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index 3e80bf2..808f78c 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import time
 
 from tempest import clients
@@ -107,7 +108,7 @@
         for server in cls.servers:
             try:
                 cls.servers_client.delete_server(server['id'])
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # Something else already cleaned up the server, nothing to be
                 # worried about
                 pass
@@ -147,7 +148,7 @@
         for image_id in cls.images:
             try:
                 cls.images_client.delete_image(image_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # The image may have already been deleted which is OK.
                 pass
             except Exception:
@@ -160,7 +161,7 @@
         for sg in cls.security_groups:
             try:
                 cls.security_groups_client.delete_security_group(sg['id'])
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # The security group may have already been deleted which is OK.
                 pass
             except Exception as exc:
@@ -174,7 +175,7 @@
         for server_group_id in cls.server_groups:
             try:
                 cls.servers_client.delete_server_group(server_group_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # The server-group may have already been deleted which is OK.
                 pass
             except Exception:
@@ -274,7 +275,7 @@
             # TODO(mriedem): We should move the wait_for_resource_deletion
             # into the delete_volume method as a convenience to the caller.
             volumes_client.wait_for_resource_deletion(volume_id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             LOG.warn("Unable to delete volume '%s' since it was not found. "
                      "Maybe it was already deleted?" % volume_id)
 
@@ -328,20 +329,17 @@
 
 class BaseV2ComputeTest(BaseComputeTest):
     _api_version = 2
-    _interface = "json"
 
 
 class BaseComputeAdminTest(BaseComputeTest):
     """Base test case class for Compute Admin API tests."""
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
         super(BaseComputeAdminTest, cls).resource_setup()
         try:
             creds = cls.isolated_creds.get_admin_creds()
-            cls.os_adm = clients.Manager(
-                credentials=creds, interface=cls._interface)
+            cls.os_adm = clients.Manager(credentials=creds)
         except NotImplementedError:
             msg = ("Missing Compute Admin API credentials in configuration.")
             raise cls.skipException(msg)
diff --git a/tempest/api/compute/floating_ips/test_floating_ips_actions.py b/tempest/api/compute/floating_ips/test_floating_ips_actions.py
index e6f4fb0..089ee5a 100644
--- a/tempest/api/compute/floating_ips/test_floating_ips_actions.py
+++ b/tempest/api/compute/floating_ips/test_floating_ips_actions.py
@@ -17,7 +17,6 @@
 
 from tempest.api.compute.floating_ips import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -51,7 +50,7 @@
         try:
             self.client.delete_floating_ip(floating_ip_id)
         # if not found, it depicts it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     @test.attr(type='gate')
@@ -136,8 +135,8 @@
                             self.new_server_id)
 
         # Make sure no longer associated with old server
-        self.assertRaises((exceptions.NotFound,
+        self.assertRaises((lib_exc.NotFound,
                            lib_exc.UnprocessableEntity,
-                           exceptions.Conflict),
+                           lib_exc.Conflict),
                           self.client.disassociate_floating_ip_from_server,
                           self.floating_ip, self.server_id)
diff --git a/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py b/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py
index b08df97..b4ea175 100644
--- a/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py
+++ b/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py
@@ -15,6 +15,8 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute.floating_ips import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -52,7 +54,7 @@
     def test_allocate_floating_ip_from_nonexistent_pool(self):
         # Negative test:Allocation of a new floating IP from a nonexistent_pool
         # to a project should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.create_floating_ip,
                           "non_exist_pool")
 
@@ -63,7 +65,7 @@
         # from project should fail
 
         # Deleting the non existent floating IP
-        self.assertRaises(exceptions.NotFound, self.client.delete_floating_ip,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_floating_ip,
                           self.non_exist_id)
 
     @test.attr(type=['negative', 'gate'])
@@ -72,7 +74,7 @@
         # Negative test:Association of a non existent floating IP
         # to specific server should fail
         # Associating non existent floating IP
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.associate_floating_ip_to_server,
                           "0.0.0.0", self.server_id)
 
@@ -81,7 +83,7 @@
     def test_dissociate_nonexistent_floating_ip(self):
         # Negative test:Dissociation of a non existent floating IP should fail
         # Dissociating non existent floating IP
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.disassociate_floating_ip_from_server,
                           "0.0.0.0", self.server_id)
 
@@ -90,6 +92,6 @@
     def test_associate_ip_to_server_without_passing_floating_ip(self):
         # Negative test:Association of empty floating IP to specific server
         # should raise NotFound or BadRequest(In case of Nova V2.1) exception.
-        self.assertRaises((exceptions.NotFound, exceptions.BadRequest),
+        self.assertRaises((lib_exc.NotFound, exceptions.BadRequest),
                           self.client.associate_floating_ip_to_server,
                           '', self.server_id)
diff --git a/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py b/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py
index c343018..b3ff132 100644
--- a/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py
+++ b/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py
@@ -15,10 +15,11 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -41,5 +42,5 @@
             non_exist_id = str(uuid.uuid4())
         else:
             non_exist_id = data_utils.rand_int_id(start=999)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_floating_ip_details, non_exist_id)
diff --git a/tempest/api/compute/images/test_image_metadata_negative.py b/tempest/api/compute/images/test_image_metadata_negative.py
index 73412ff..0013714 100644
--- a/tempest/api/compute/images/test_image_metadata_negative.py
+++ b/tempest/api/compute/images/test_image_metadata_negative.py
@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -30,21 +31,21 @@
     def test_list_nonexistent_image_metadata(self):
         # Negative test: List on nonexistent image
         # metadata should not happen
-        self.assertRaises(exceptions.NotFound, self.client.list_image_metadata,
+        self.assertRaises(lib_exc.NotFound, self.client.list_image_metadata,
                           data_utils.rand_uuid())
 
     @test.attr(type=['negative', 'gate'])
     def test_update_nonexistent_image_metadata(self):
         # Negative test:An update should not happen for a non-existent image
         meta = {'os_distro': 'alt1', 'os_version': 'alt2'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.update_image_metadata,
                           data_utils.rand_uuid(), meta)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_nonexistent_image_metadata_item(self):
         # Negative test: Get on non-existent image should not happen
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_image_metadata_item,
                           data_utils.rand_uuid(), 'os_version')
 
@@ -52,7 +53,7 @@
     def test_set_nonexistent_image_metadata(self):
         # Negative test: Metadata should not be set to a non-existent image
         meta = {'os_distro': 'alt1', 'os_version': 'alt2'}
-        self.assertRaises(exceptions.NotFound, self.client.set_image_metadata,
+        self.assertRaises(lib_exc.NotFound, self.client.set_image_metadata,
                           data_utils.rand_uuid(), meta)
 
     @test.attr(type=['negative', 'gate'])
@@ -60,7 +61,7 @@
         # Negative test: Metadata item should not be set to a
         # nonexistent image
         meta = {'os_distro': 'alt'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.set_image_metadata_item,
                           data_utils.rand_uuid(), 'os_distro',
                           meta)
@@ -69,6 +70,6 @@
     def test_delete_nonexistent_image_metadata_item(self):
         # Negative test: Shouldn't be able to delete metadata
         # item from non-existent image
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_image_metadata_item,
                           data_utils.rand_uuid(), 'os_distro')
diff --git a/tempest/api/compute/images/test_images_negative.py b/tempest/api/compute/images/test_images_negative.py
index 58fc20d..cf127ee 100644
--- a/tempest/api/compute/images/test_images_negative.py
+++ b/tempest/api/compute/images/test_images_negative.py
@@ -12,10 +12,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -49,7 +50,7 @@
         # Create a new image after server is deleted
         name = data_utils.rand_name('image')
         meta = {'image_type': 'test'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.create_image_from_server,
                           server['id'], name=name, meta=meta)
 
@@ -61,7 +62,7 @@
         meta = {'image_type': 'test'}
         resp = {}
         resp['status'] = None
-        self.assertRaises(exceptions.NotFound, self.create_image_from_server,
+        self.assertRaises(lib_exc.NotFound, self.create_image_from_server,
                           '!@#$%^&*()', name=name, meta=meta)
 
     @test.attr(type=['negative', 'gate'])
@@ -84,7 +85,7 @@
         # Return an error if Image ID passed is 35 characters or less
         snapshot_name = data_utils.rand_name('test-snap-')
         test_uuid = ('a' * 35)
-        self.assertRaises(exceptions.NotFound, self.client.create_image,
+        self.assertRaises(lib_exc.NotFound, self.client.create_image,
                           test_uuid, snapshot_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -92,13 +93,13 @@
         # Return an error if Image ID passed is 37 characters or more
         snapshot_name = data_utils.rand_name('test-snap-')
         test_uuid = ('a' * 37)
-        self.assertRaises(exceptions.NotFound, self.client.create_image,
+        self.assertRaises(lib_exc.NotFound, self.client.create_image,
                           test_uuid, snapshot_name)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_with_invalid_image_id(self):
         # An image should not be deleted with invalid image id
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           '!@$%^&*()')
 
     @test.attr(type=['negative', 'gate'])
@@ -106,28 +107,28 @@
         # Return an error while trying to delete a non-existent image
 
         non_existent_image_id = '11a22b9-12a9-5555-cc11-00ab112223fa'
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           non_existent_image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_blank_id(self):
         # Return an error while trying to delete an image with blank Id
-        self.assertRaises(exceptions.NotFound, self.client.delete_image, '')
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image, '')
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_non_hex_string_id(self):
         # Return an error while trying to delete an image with non hex id
         image_id = '11a22b9-120q-5555-cc11-00ab112223gj'
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_negative_image_id(self):
         # Return an error while trying to delete an image with negative id
-        self.assertRaises(exceptions.NotFound, self.client.delete_image, -1)
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image, -1)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_id_is_over_35_character_limit(self):
         # Return an error while trying to delete image with id over limit
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           '11a22b9-12a9-5555-cc11-00ab112223fa-3fac')
diff --git a/tempest/api/compute/images/test_images_oneserver_negative.py b/tempest/api/compute/images/test_images_oneserver_negative.py
index 46cec9b..63f5b9e 100644
--- a/tempest/api/compute/images/test_images_oneserver_negative.py
+++ b/tempest/api/compute/images/test_images_oneserver_negative.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -102,7 +104,7 @@
 
         # Create second snapshot
         alt_snapshot_name = data_utils.rand_name('test-snap-')
-        self.assertRaises(exceptions.Conflict, self.client.create_image,
+        self.assertRaises(lib_exc.Conflict, self.client.create_image,
                           self.server_id, alt_snapshot_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -127,4 +129,4 @@
         self.client.delete_image(image_id)
         self.image_ids.remove(image_id)
 
-        self.assertRaises(exceptions.NotFound, self.client.get_image, image_id)
+        self.assertRaises(lib_exc.NotFound, self.client.get_image, image_id)
diff --git a/tempest/api/compute/images/test_list_image_filters.py b/tempest/api/compute/images/test_list_image_filters.py
index 742c2dd..3f37a16 100644
--- a/tempest/api/compute/images/test_list_image_filters.py
+++ b/tempest/api/compute/images/test_list_image_filters.py
@@ -172,8 +172,6 @@
         # Verify only the expected number of results are returned
         params = {'limit': '1'}
         images = self.client.list_images(params)
-        # when _interface='xml', one element for images_links in images
-        # ref: Question #224349
         self.assertEqual(1, len([x for x in images if 'id' in x]))
 
     @test.attr(type='gate')
diff --git a/tempest/api/compute/images/test_list_image_filters_negative.py b/tempest/api/compute/images/test_list_image_filters_negative.py
index a8f2ae7..77c9459 100644
--- a/tempest/api/compute/images/test_list_image_filters_negative.py
+++ b/tempest/api/compute/images/test_list_image_filters_negative.py
@@ -12,10 +12,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -35,5 +36,5 @@
     def test_get_nonexistent_image(self):
         # Check raises a NotFound
         nonexistent_image = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.get_image,
+        self.assertRaises(lib_exc.NotFound, self.client.get_image,
                           nonexistent_image)
diff --git a/tempest/api/compute/keypairs/test_keypairs_negative.py b/tempest/api/compute/keypairs/test_keypairs_negative.py
index 4e06d6c..1586405 100644
--- a/tempest/api/compute/keypairs/test_keypairs_negative.py
+++ b/tempest/api/compute/keypairs/test_keypairs_negative.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -43,7 +45,7 @@
     def test_keypair_delete_nonexistent_key(self):
         # Non-existent key deletion should throw a proper error
         k_name = data_utils.rand_name("keypair-non-existent-")
-        self.assertRaises(exceptions.NotFound, self.client.delete_keypair,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_keypair,
                           k_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -68,7 +70,7 @@
         k_name = data_utils.rand_name('keypair-')
         self.client.create_keypair(k_name)
         # Now try the same keyname to create another key
-        self.assertRaises(exceptions.Conflict, self._create_keypair,
+        self.assertRaises(lib_exc.Conflict, self._create_keypair,
                           k_name)
         self.client.delete_keypair(k_name)
 
diff --git a/tempest/api/compute/limits/test_absolute_limits_negative.py b/tempest/api/compute/limits/test_absolute_limits_negative.py
index d537d83..9776db3 100644
--- a/tempest/api/compute/limits/test_absolute_limits_negative.py
+++ b/tempest/api/compute/limits/test_absolute_limits_negative.py
@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common import tempest_fixtures as fixtures
-from tempest import exceptions
 from tempest import test
 
 
@@ -51,5 +52,5 @@
 
         # A 403 Forbidden or 413 Overlimit (old behaviour) exception
         # will be raised when out of quota
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.create_test_server, meta=meta_data)
diff --git a/tempest/api/compute/security_groups/test_security_group_rules_negative.py b/tempest/api/compute/security_groups/test_security_group_rules_negative.py
index d97c404..c8da63f 100644
--- a/tempest/api/compute/security_groups/test_security_group_rules_negative.py
+++ b/tempest/api/compute/security_groups/test_security_group_rules_negative.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute.security_groups import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -46,7 +48,7 @@
         ip_protocol = 'tcp'
         from_port = 22
         to_port = 22
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.create_security_group_rule,
                           parent_group_id, ip_protocol, from_port, to_port)
 
@@ -158,6 +160,6 @@
         # Negative test: Deletion of Security Group rule should be FAIL
         # with non existent id
         non_existent_rule_id = not_existing_id()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_security_group_rule,
                           non_existent_rule_id)
diff --git a/tempest/api/compute/security_groups/test_security_groups_negative.py b/tempest/api/compute/security_groups/test_security_groups_negative.py
index ee9f78b..a083406 100644
--- a/tempest/api/compute/security_groups/test_security_groups_negative.py
+++ b/tempest/api/compute/security_groups/test_security_groups_negative.py
@@ -14,6 +14,7 @@
 #    under the License.
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.api.compute.security_groups import base
@@ -53,7 +54,7 @@
         # Negative test:Should not be able to GET the details
         # of non-existent Security Group
         non_exist_id = self._generate_a_non_existent_security_group_id()
-        self.assertRaises(exceptions.NotFound, self.client.get_security_group,
+        self.assertRaises(lib_exc.NotFound, self.client.get_security_group,
                           non_exist_id)
 
     @decorators.skip_because(bug="1161411",
@@ -132,7 +133,7 @@
     def test_delete_nonexistent_security_group(self):
         # Negative test:Deletion of a non-existent Security Group should fail
         non_exist_id = self._generate_a_non_existent_security_group_id()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_security_group, non_exist_id)
 
     @test.attr(type=['negative', 'smoke'])
@@ -140,7 +141,7 @@
     def test_delete_security_group_without_passing_id(self):
         # Negative test:Deletion of a Security Group with out passing ID
         # should Fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_security_group, '')
 
     @testtools.skipIf(CONF.service_available.neutron,
@@ -194,7 +195,7 @@
         non_exist_id = self._generate_a_non_existent_security_group_id()
         s_name = data_utils.rand_name('sg-')
         s_description = data_utils.rand_name('description-')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.update_security_group,
                           non_exist_id, name=s_name,
                           description=s_description)
diff --git a/tempest/api/compute/servers/test_instance_actions_negative.py b/tempest/api/compute/servers/test_instance_actions_negative.py
index e92f04c..116191c 100644
--- a/tempest/api/compute/servers/test_instance_actions_negative.py
+++ b/tempest/api/compute/servers/test_instance_actions_negative.py
@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -32,12 +33,12 @@
     def test_list_instance_actions_non_existent_server(self):
         # List actions of the non-existent server id
         non_existent_server_id = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.list_instance_actions,
                           non_existent_server_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_instance_action_invalid_request(self):
         # Get the action details of the provided server with invalid request
-        self.assertRaises(exceptions.NotFound, self.client.get_instance_action,
+        self.assertRaises(lib_exc.NotFound, self.client.get_instance_action,
                           self.server_id, '999')
diff --git a/tempest/api/compute/servers/test_list_server_filters.py b/tempest/api/compute/servers/test_list_server_filters.py
index 375f441..cb90873 100644
--- a/tempest/api/compute/servers/test_list_server_filters.py
+++ b/tempest/api/compute/servers/test_list_server_filters.py
@@ -14,12 +14,12 @@
 #    under the License.
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.compute import base
 from tempest.api import utils
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -48,13 +48,13 @@
         # not exist, fail early since the tests won't work...
         try:
             cls.images_client.get_image(cls.image_ref)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             raise RuntimeError("Image %s (image_ref) was not found!" %
                                cls.image_ref)
 
         try:
             cls.images_client.get_image(cls.image_ref_alt)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             raise RuntimeError("Image %s (image_ref_alt) was not found!" %
                                cls.image_ref_alt)
 
diff --git a/tempest/api/compute/servers/test_list_servers_negative.py b/tempest/api/compute/servers/test_list_servers_negative.py
index fd66d2b..4655f7f 100644
--- a/tempest/api/compute/servers/test_list_servers_negative.py
+++ b/tempest/api/compute/servers/test_list_servers_negative.py
@@ -101,7 +101,6 @@
         # List servers by specifying limits
         resp, body = self.client.list_servers({'limit': 1})
         self.assertEqual('200', resp['status'])
-        # when _interface='xml', one element for servers_links in servers
         self.assertEqual(1, len([x for x in body['servers'] if 'id' in x]))
 
     @test.attr(type=['negative', 'gate'])
diff --git a/tempest/api/compute/servers/test_server_actions.py b/tempest/api/compute/servers/test_server_actions.py
index 9edaede..f948a3a 100644
--- a/tempest/api/compute/servers/test_server_actions.py
+++ b/tempest/api/compute/servers/test_server_actions.py
@@ -18,13 +18,13 @@
 import urlparse
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest.common.utils.linux import remote_client
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -262,7 +262,7 @@
             if oldest_backup_exist:
                 try:
                     self.os.image_client.delete_image(oldest_backup)
-                except exceptions.NotFound:
+                except lib_exc.NotFound:
                     pass
                 else:
                     LOG.warning("Deletion of oldest backup %s should not have "
@@ -464,7 +464,7 @@
         self.assertEqual(200, resp.status)
         self.assertEqual(server['status'], 'ACTIVE')
         # Locked server is not allowed to be stopped by non-admin user
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.servers_client.stop, self.server_id)
         resp, server = self.servers_client.unlock_server(self.server_id)
         self.assertEqual(202, resp.status)
diff --git a/tempest/api/compute/servers/test_server_addresses_negative.py b/tempest/api/compute/servers/test_server_addresses_negative.py
index 3087e59..77a041a 100644
--- a/tempest/api/compute/servers/test_server_addresses_negative.py
+++ b/tempest/api/compute/servers/test_server_addresses_negative.py
@@ -13,8 +13,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
-from tempest import exceptions
 from tempest import test
 
 
@@ -32,13 +33,13 @@
     @test.services('network')
     def test_list_server_addresses_invalid_server_id(self):
         # List addresses request should fail if server id not in system
-        self.assertRaises(exceptions.NotFound, self.client.list_addresses,
+        self.assertRaises(lib_exc.NotFound, self.client.list_addresses,
                           '999')
 
     @test.attr(type=['negative', 'gate'])
     @test.services('network')
     def test_list_server_addresses_by_network_neg(self):
         # List addresses by network should fail if network name not valid
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.list_addresses_by_network,
                           self.server['id'], 'invalid')
diff --git a/tempest/api/compute/servers/test_server_metadata_negative.py b/tempest/api/compute/servers/test_server_metadata_negative.py
index e193677..7fe95dd 100644
--- a/tempest/api/compute/servers/test_server_metadata_negative.py
+++ b/tempest/api/compute/servers/test_server_metadata_negative.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -40,7 +42,7 @@
         for sz in [256, 257, 511, 1023]:
             key = "k" * sz
             meta = {key: 'data1'}
-            self.assertRaises((exceptions.BadRequest, exceptions.OverLimit),
+            self.assertRaises((exceptions.BadRequest, lib_exc.OverLimit),
                               self.create_test_server,
                               meta=meta)
 
@@ -58,7 +60,7 @@
     def test_server_metadata_non_existent_server(self):
         # GET on a non-existent server should not succeed
         non_existent_server_id = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_server_metadata_item,
                           non_existent_server_id,
                           'test2')
@@ -67,7 +69,7 @@
     def test_list_server_metadata_non_existent_server(self):
         # List metadata on a non-existent server should not succeed
         non_existent_server_id = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.list_server_metadata,
                           non_existent_server_id)
 
@@ -85,7 +87,7 @@
         # Set metadata on a non-existent server should not succeed
         non_existent_server_id = data_utils.rand_uuid()
         meta = {'meta1': 'data1'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.set_server_metadata,
                           non_existent_server_id,
                           meta)
@@ -95,7 +97,7 @@
         # An update should not happen for a non-existent server
         non_existent_server_id = data_utils.rand_uuid()
         meta = {'key1': 'value1', 'key2': 'value2'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.update_server_metadata,
                           non_existent_server_id,
                           meta)
@@ -112,7 +114,7 @@
     def test_delete_metadata_non_existent_server(self):
         # Should not be able to delete metadata item from a non-existent server
         non_existent_server_id = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_server_metadata_item,
                           non_existent_server_id,
                           'd')
@@ -130,14 +132,14 @@
         req_metadata = {}
         for num in range(1, quota_metadata + 2):
             req_metadata['key' + str(num)] = 'val' + str(num)
-        self.assertRaises((exceptions.OverLimit, exceptions.Unauthorized),
+        self.assertRaises((lib_exc.OverLimit, lib_exc.Unauthorized),
                           self.client.set_server_metadata,
                           self.server_id, req_metadata)
 
         # A 403 Forbidden or 413 Overlimit (old behaviour) exception
         # will be raised while exceeding metadata items limit for
         # tenant.
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.client.update_server_metadata,
                           self.server_id, req_metadata)
 
diff --git a/tempest/api/compute/servers/test_server_personality.py b/tempest/api/compute/servers/test_server_personality.py
index c6d48bc..bd3ebb0 100644
--- a/tempest/api/compute/servers/test_server_personality.py
+++ b/tempest/api/compute/servers/test_server_personality.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 import base64
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.compute import base
-from tempest import exceptions
 from tempest import test
 
 
@@ -44,7 +44,7 @@
                                 'contents': base64.b64encode(file_contents)})
         # A 403 Forbidden or 413 Overlimit (old behaviour) exception
         # will be raised when out of quota
-        self.assertRaises((exceptions.Unauthorized, exceptions.OverLimit),
+        self.assertRaises((lib_exc.Unauthorized, lib_exc.OverLimit),
                           self.create_test_server, personality=personality)
 
     @test.attr(type='gate')
diff --git a/tempest/api/compute/servers/test_server_rescue_negative.py b/tempest/api/compute/servers/test_server_rescue_negative.py
index c01a95c..6780455 100644
--- a/tempest/api/compute/servers/test_server_rescue_negative.py
+++ b/tempest/api/compute/servers/test_server_rescue_negative.py
@@ -12,12 +12,13 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
+
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -81,26 +82,26 @@
         self.addCleanup(self._unpause, self.server_id)
         self.assertEqual(202, resp.status)
         self.servers_client.wait_for_server_status(self.server_id, 'PAUSED')
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.servers_client.rescue_server,
                           self.server_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_rescued_vm_reboot(self):
-        self.assertRaises(exceptions.Conflict, self.servers_client.reboot,
+        self.assertRaises(lib_exc.Conflict, self.servers_client.reboot,
                           self.rescue_id, 'HARD')
 
     @test.attr(type=['negative', 'gate'])
     def test_rescue_non_existent_server(self):
         # Rescue a non-existing server
         non_existent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.servers_client.rescue_server,
                           non_existent_server)
 
     @test.attr(type=['negative', 'gate'])
     def test_rescued_vm_rebuild(self):
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.servers_client.rebuild,
                           self.rescue_id,
                           self.image_ref_alt)
@@ -117,7 +118,7 @@
         self.addCleanup(self._unrescue, self.server_id)
 
         # Attach the volume to the server
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.servers_client.attach_volume,
                           self.server_id,
                           volume['id'],
@@ -144,7 +145,7 @@
         self.addCleanup(self._unrescue, self.server_id)
 
         # Detach the volume from the server expecting failure
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.servers_client.detach_volume,
                           self.server_id,
                           volume['id'])
diff --git a/tempest/api/compute/servers/test_servers_negative.py b/tempest/api/compute/servers/test_servers_negative.py
index b703cfe..845a71e 100644
--- a/tempest/api/compute/servers/test_servers_negative.py
+++ b/tempest/api/compute/servers/test_servers_negative.py
@@ -15,6 +15,7 @@
 
 import sys
 
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.api.compute import base
@@ -108,7 +109,7 @@
     def test_resize_nonexistent_server(self):
         # Resize a non-existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.resize,
                           nonexistent_server, self.flavor_ref)
 
@@ -133,7 +134,7 @@
     def test_reboot_non_existent_server(self):
         # Reboot a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.reboot,
+        self.assertRaises(lib_exc.NotFound, self.client.reboot,
                           nonexistent_server, 'SOFT')
 
     @testtools.skipUnless(CONF.compute_feature_enabled.pause,
@@ -143,7 +144,7 @@
         # Pause a paused server.
         self.client.pause_server(self.server_id)
         self.client.wait_for_server_status(self.server_id, 'PAUSED')
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.pause_server,
                           self.server_id)
         self.client.unpause_server(self.server_id)
@@ -155,17 +156,17 @@
         self.client.delete_server(server['id'])
         self.client.wait_for_server_termination(server['id'])
 
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.rebuild,
                           server['id'], self.image_ref_alt)
-        self.assertRaises(exceptions.NotFound, self.client.reboot,
+        self.assertRaises(lib_exc.NotFound, self.client.reboot,
                           server['id'], 'SOFT')
 
     @test.attr(type=['negative', 'gate'])
     def test_rebuild_non_existent_server(self):
         # Rebuild a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.rebuild,
                           nonexistent_server,
                           self.image_ref_alt)
@@ -210,7 +211,7 @@
         # Pass really long metadata while creating a server
 
         metadata = {'a': 'b' * 260}
-        self.assertRaises((exceptions.BadRequest, exceptions.OverLimit),
+        self.assertRaises((exceptions.BadRequest, lib_exc.OverLimit),
                           self.create_test_server,
                           meta=metadata)
 
@@ -221,7 +222,7 @@
         server_name = data_utils.rand_name('server')
         new_name = data_utils.rand_name('server') + '_updated'
 
-        self.assertRaises(exceptions.NotFound, self.client.update_server,
+        self.assertRaises(lib_exc.NotFound, self.client.update_server,
                           server_name, name=new_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -239,7 +240,7 @@
         # Update name of a server that belongs to another tenant
 
         new_name = self.server_id + '_new'
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.update_server, self.server_id,
                           name=new_name)
 
@@ -258,13 +259,13 @@
         # Delete a non existent server
 
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.delete_server,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_server,
                           nonexistent_server)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_a_server_of_another_tenant(self):
         # Delete a server that belongs to another tenant
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.delete_server,
                           self.server_id)
 
@@ -272,13 +273,13 @@
     def test_delete_server_pass_negative_id(self):
         # Pass an invalid string parameter to delete server
 
-        self.assertRaises(exceptions.NotFound, self.client.delete_server, -1)
+        self.assertRaises(lib_exc.NotFound, self.client.delete_server, -1)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_server_pass_id_exceeding_length_limit(self):
         # Pass a server ID that exceeds length limit to delete server
 
-        self.assertRaises(exceptions.NotFound, self.client.delete_server,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_server,
                           sys.maxint + 1)
 
     @test.attr(type=['negative', 'gate'])
@@ -294,14 +295,14 @@
     def test_get_non_existent_server(self):
         # Get a non existent server details
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.get_server,
+        self.assertRaises(lib_exc.NotFound, self.client.get_server,
                           nonexistent_server)
 
     @test.attr(type=['negative', 'gate'])
     def test_stop_non_existent_server(self):
         # Stop a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.servers_client.stop,
+        self.assertRaises(lib_exc.NotFound, self.servers_client.stop,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.pause,
@@ -310,7 +311,7 @@
     def test_pause_non_existent_server(self):
         # pause a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.pause_server,
+        self.assertRaises(lib_exc.NotFound, self.client.pause_server,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.pause,
@@ -319,7 +320,7 @@
     def test_unpause_non_existent_server(self):
         # unpause a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.unpause_server,
+        self.assertRaises(lib_exc.NotFound, self.client.unpause_server,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.pause,
@@ -327,7 +328,7 @@
     @test.attr(type=['negative', 'gate'])
     def test_unpause_server_invalid_state(self):
         # unpause an active server.
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.unpause_server,
                           self.server_id)
 
@@ -337,7 +338,7 @@
     def test_suspend_non_existent_server(self):
         # suspend a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.suspend_server,
+        self.assertRaises(lib_exc.NotFound, self.client.suspend_server,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.suspend,
@@ -348,7 +349,7 @@
         resp, _ = self.client.suspend_server(self.server_id)
         self.assertEqual(202, resp.status)
         self.client.wait_for_server_status(self.server_id, 'SUSPENDED')
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.suspend_server,
                           self.server_id)
         self.client.resume_server(self.server_id)
@@ -359,7 +360,7 @@
     def test_resume_non_existent_server(self):
         # resume a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.resume_server,
+        self.assertRaises(lib_exc.NotFound, self.client.resume_server,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.suspend,
@@ -367,7 +368,7 @@
     @test.attr(type=['negative', 'gate'])
     def test_resume_server_invalid_state(self):
         # resume an active server.
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.resume_server,
                           self.server_id)
 
@@ -375,7 +376,7 @@
     def test_get_console_output_of_non_existent_server(self):
         # get the console output for a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_console_output,
                           nonexistent_server, 10)
 
@@ -383,7 +384,7 @@
     def test_force_delete_nonexistent_server_id(self):
         # force-delete a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.force_delete_server,
                           nonexistent_server)
 
@@ -391,14 +392,14 @@
     def test_restore_nonexistent_server_id(self):
         # restore-delete a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.restore_soft_deleted_server,
                           nonexistent_server)
 
     @test.attr(type=['negative', 'gate'])
     def test_restore_server_invalid_state(self):
         # we can only restore-delete a server in 'soft-delete' state
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.restore_soft_deleted_server,
                           self.server_id)
 
@@ -408,7 +409,7 @@
     def test_shelve_non_existent_server(self):
         # shelve a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.shelve_server,
+        self.assertRaises(lib_exc.NotFound, self.client.shelve_server,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.shelve,
@@ -435,7 +436,7 @@
         self.assertEqual(1, len(images))
         self.assertEqual(image_name, images[0]['name'])
 
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.shelve_server,
                           self.server_id)
 
@@ -447,7 +448,7 @@
     def test_unshelve_non_existent_server(self):
         # unshelve a non existent server
         nonexistent_server = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.unshelve_server,
+        self.assertRaises(lib_exc.NotFound, self.client.unshelve_server,
                           nonexistent_server)
 
     @testtools.skipUnless(CONF.compute_feature_enabled.shelve,
@@ -455,6 +456,6 @@
     @test.attr(type=['negative', 'gate'])
     def test_unshelve_server_invalid_state(self):
         # unshelve an active server.
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.unshelve_server,
                           self.server_id)
diff --git a/tempest/api/compute/servers/test_virtual_interfaces_negative.py b/tempest/api/compute/servers/test_virtual_interfaces_negative.py
index e81ccc6..d66b7ba 100644
--- a/tempest/api/compute/servers/test_virtual_interfaces_negative.py
+++ b/tempest/api/compute/servers/test_virtual_interfaces_negative.py
@@ -15,8 +15,9 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
-from tempest import exceptions
 from tempest import test
 
 
@@ -35,6 +36,6 @@
         # Negative test: Should not be able to GET virtual interfaces
         # for an invalid server_id
         invalid_server_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.list_virtual_interfaces,
                           invalid_server_id)
diff --git a/tempest/api/compute/test_authorization.py b/tempest/api/compute/test_authorization.py
index cdbaee8..16b7ed2 100644
--- a/tempest/api/compute/test_authorization.py
+++ b/tempest/api/compute/test_authorization.py
@@ -15,6 +15,8 @@
 
 import StringIO
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest import clients
 from tempest.common.utils import data_utils
@@ -93,32 +95,32 @@
     @test.attr(type='gate')
     def test_get_server_for_alt_account_fails(self):
         # A GET request for a server on another user's account should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.get_server,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.get_server,
                           self.server['id'])
 
     @test.attr(type='gate')
     def test_delete_server_for_alt_account_fails(self):
         # A DELETE request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.delete_server,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.delete_server,
                           self.server['id'])
 
     @test.attr(type='gate')
     def test_update_server_for_alt_account_fails(self):
         # An update server request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.update_server,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.update_server,
                           self.server['id'], name='test')
 
     @test.attr(type='gate')
     def test_list_server_addresses_for_alt_account_fails(self):
         # A list addresses request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.list_addresses,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.list_addresses,
                           self.server['id'])
 
     @test.attr(type='gate')
     def test_list_server_addresses_by_network_for_alt_account_fails(self):
         # A list address/network request for another user's server should fail
         server_id = self.server['id']
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.list_addresses_by_network, server_id,
                           'public')
 
@@ -135,31 +137,31 @@
     @test.attr(type='gate')
     def test_change_password_for_alt_account_fails(self):
         # A change password request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.change_password,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.change_password,
                           self.server['id'], 'newpass')
 
     @test.attr(type='gate')
     def test_reboot_server_for_alt_account_fails(self):
         # A reboot request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.reboot,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.reboot,
                           self.server['id'], 'HARD')
 
     @test.attr(type='gate')
     def test_rebuild_server_for_alt_account_fails(self):
         # A rebuild request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.rebuild,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.rebuild,
                           self.server['id'], self.image_ref_alt)
 
     @test.attr(type='gate')
     def test_resize_server_for_alt_account_fails(self):
         # A resize request for another user's server should fail
-        self.assertRaises(exceptions.NotFound, self.alt_client.resize,
+        self.assertRaises(lib_exc.NotFound, self.alt_client.resize,
                           self.server['id'], self.flavor_ref_alt)
 
     @test.attr(type='gate')
     def test_create_image_for_alt_account_fails(self):
         # A create image request for another user's server should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_images_client.create_image,
                           self.server['id'], 'testImage')
 
@@ -208,27 +210,27 @@
     @test.attr(type='gate')
     def test_get_keypair_of_alt_account_fails(self):
         # A GET request for another user's keypair should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_keypairs_client.get_keypair,
                           self.keypairname)
 
     @test.attr(type='gate')
     def test_delete_keypair_of_alt_account_fails(self):
         # A DELETE request for another user's keypair should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_keypairs_client.delete_keypair,
                           self.keypairname)
 
     @test.attr(type='gate')
     def test_get_image_for_alt_account_fails(self):
         # A GET request for an image on another user's account should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_images_client.get_image, self.image['id'])
 
     @test.attr(type='gate')
     def test_delete_image_for_alt_account_fails(self):
         # A DELETE request for another user's image should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_images_client.delete_image,
                           self.image['id'])
 
@@ -260,14 +262,14 @@
     @test.attr(type='gate')
     def test_get_security_group_of_alt_account_fails(self):
         # A GET request for another user's security group should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_security_client.get_security_group,
                           self.security_group['id'])
 
     @test.attr(type='gate')
     def test_delete_security_group_of_alt_account_fails(self):
         # A DELETE request for another user's security group should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_security_client.delete_security_group,
                           self.security_group['id'])
 
@@ -305,7 +307,7 @@
     def test_delete_security_group_rule_of_alt_account_fails(self):
         # A DELETE request for another user's security group rule
         # should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_security_client.delete_security_group_rule,
                           self.rule['id'])
 
@@ -313,7 +315,7 @@
     def test_set_metadata_of_alt_account_server_fails(self):
         # A set metadata for another user's server should fail
         req_metadata = {'meta1': 'data1', 'meta2': 'data2'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.set_server_metadata,
                           self.server['id'],
                           req_metadata)
@@ -322,7 +324,7 @@
     def test_set_metadata_of_alt_account_image_fails(self):
         # A set metadata for another user's image should fail
         req_metadata = {'meta1': 'value1', 'meta2': 'value2'}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_images_client.set_image_metadata,
                           self.image['id'], req_metadata)
 
@@ -333,7 +335,7 @@
         self.client.set_server_metadata(self.server['id'], req_metadata)
         self.addCleanup(self.client.delete_server_metadata_item,
                         self.server['id'], 'meta1')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.get_server_metadata_item,
                           self.server['id'], 'meta1')
 
@@ -345,7 +347,7 @@
                         self.image['id'], 'meta1')
         self.images_client.set_image_metadata(self.image['id'],
                                               req_metadata)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_images_client.get_image_metadata_item,
                           self.image['id'], 'meta1')
 
@@ -356,7 +358,7 @@
         self.addCleanup(self.client.delete_server_metadata_item,
                         self.server['id'], 'meta1')
         self.client.set_server_metadata(self.server['id'], req_metadata)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.delete_server_metadata_item,
                           self.server['id'], 'meta1')
 
@@ -368,13 +370,13 @@
                         self.image['id'], 'meta1')
         self.images_client.set_image_metadata(self.image['id'],
                                               req_metadata)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_images_client.delete_image_metadata_item,
                           self.image['id'], 'meta1')
 
     @test.attr(type='gate')
     def test_get_console_output_of_alt_account_server_fails(self):
         # A Get Console Output for another user's server should fail
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_client.get_console_output,
                           self.server['id'], 10)
diff --git a/tempest/api/compute/volumes/test_volumes_get.py b/tempest/api/compute/volumes/test_volumes_get.py
index 53f5ac0..69998d2 100644
--- a/tempest/api/compute/volumes/test_volumes_get.py
+++ b/tempest/api/compute/volumes/test_volumes_get.py
@@ -38,7 +38,7 @@
     def test_volume_create_get_delete(self):
         # CREATE, GET, DELETE Volume
         volume = None
-        v_name = data_utils.rand_name('Volume-%s-') % self._interface
+        v_name = data_utils.rand_name('Volume')
         metadata = {'Type': 'work'}
         # Create volume
         volume = self.client.create_volume(size=1,
diff --git a/tempest/api/compute/volumes/test_volumes_list.py b/tempest/api/compute/volumes/test_volumes_list.py
index c0ac99b..ba7ee6b 100644
--- a/tempest/api/compute/volumes/test_volumes_list.py
+++ b/tempest/api/compute/volumes/test_volumes_list.py
@@ -42,7 +42,7 @@
         cls.volume_list = []
         cls.volume_id_list = []
         for i in range(3):
-            v_name = data_utils.rand_name('volume-%s' % cls._interface)
+            v_name = data_utils.rand_name('volume')
             metadata = {'Type': 'work'}
             try:
                 volume = cls.client.create_volume(size=1,
diff --git a/tempest/api/compute/volumes/test_volumes_negative.py b/tempest/api/compute/volumes/test_volumes_negative.py
index f0f9879..53253c9 100644
--- a/tempest/api/compute/volumes/test_volumes_negative.py
+++ b/tempest/api/compute/volumes/test_volumes_negative.py
@@ -15,6 +15,8 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -39,7 +41,7 @@
         # Negative: Should not be able to get details of nonexistent volume
         # Creating a nonexistent volume id
         # Trying to GET a non existent volume
-        self.assertRaises(exceptions.NotFound, self.client.get_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.get_volume,
                           str(uuid.uuid4()))
 
     @test.attr(type=['negative', 'gate'])
@@ -47,7 +49,7 @@
         # Negative: Should not be able to delete nonexistent Volume
         # Creating nonexistent volume id
         # Trying to DELETE a non existent volume
-        self.assertRaises(exceptions.NotFound, self.client.delete_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_volume,
                           str(uuid.uuid4()))
 
     @test.attr(type=['negative', 'gate'])
@@ -79,22 +81,22 @@
     @test.attr(type=['negative', 'gate'])
     def test_get_invalid_volume_id(self):
         # Negative: Should not be able to get volume with invalid id
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_volume, '#$%%&^&^')
 
     @test.attr(type=['negative', 'gate'])
     def test_get_volume_without_passing_volume_id(self):
         # Negative: Should not be able to get volume when empty ID is passed
-        self.assertRaises(exceptions.NotFound, self.client.get_volume, '')
+        self.assertRaises(lib_exc.NotFound, self.client.get_volume, '')
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_invalid_volume_id(self):
         # Negative: Should not be able to delete volume when invalid ID is
         # passed
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_volume, '!@#$%^&*()')
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_volume_without_passing_volume_id(self):
         # Negative: Should not be able to delete volume when empty ID is passed
-        self.assertRaises(exceptions.NotFound, self.client.delete_volume, '')
+        self.assertRaises(lib_exc.NotFound, self.client.delete_volume, '')
diff --git a/tempest/api/data_processing/base.py b/tempest/api/data_processing/base.py
index 45c8488..5992921 100644
--- a/tempest/api/data_processing/base.py
+++ b/tempest/api/data_processing/base.py
@@ -12,8 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest import config
-from tempest import exceptions
 import tempest.test
 
 
@@ -21,16 +22,26 @@
 
 
 class BaseDataProcessingTest(tempest.test.BaseTestCase):
-    _interface = 'json'
+
+    @classmethod
+    def skip_checks(cls):
+        super(BaseDataProcessingTest, cls).skip_checks()
+        if not CONF.service_available.sahara:
+            raise cls.skipException('Sahara support is required')
+
+    @classmethod
+    def setup_credentials(cls):
+        super(BaseDataProcessingTest, cls).setup_credentials()
+        cls.os = cls.get_client_manager()
+
+    @classmethod
+    def setup_clients(cls):
+        super(BaseDataProcessingTest, cls).setup_clients()
+        cls.client = cls.os.data_processing_client
 
     @classmethod
     def resource_setup(cls):
         super(BaseDataProcessingTest, cls).resource_setup()
-        if not CONF.service_available.sahara:
-            raise cls.skipException('Sahara support is required')
-
-        cls.os = cls.get_client_manager()
-        cls.client = cls.os.data_processing_client
 
         cls.flavor_ref = CONF.compute.flavor_ref
 
@@ -63,7 +74,7 @@
         for resource_id in resource_id_list:
             try:
                 method(resource_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # ignore errors while auto removing created resource
                 pass
 
diff --git a/tempest/api/database/base.py b/tempest/api/database/base.py
index e67df24..31c5d2a 100644
--- a/tempest/api/database/base.py
+++ b/tempest/api/database/base.py
@@ -24,8 +24,6 @@
 class BaseDatabaseTest(tempest.test.BaseTestCase):
     """Base test case class for all Database API tests."""
 
-    _interface = 'json'
-
     @classmethod
     def skip_checks(cls):
         super(BaseDatabaseTest, cls).skip_checks()
diff --git a/tempest/api/database/flavors/test_flavors_negative.py b/tempest/api/database/flavors/test_flavors_negative.py
index f8c7b83..bb9c05d 100644
--- a/tempest/api/database/flavors/test_flavors_negative.py
+++ b/tempest/api/database/flavors/test_flavors_negative.py
@@ -13,8 +13,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.database import base
-from tempest import exceptions
 from tempest import test
 
 
@@ -28,5 +29,5 @@
     @test.attr(type=['negative', 'gate'])
     def test_get_non_existent_db_flavor(self):
         # flavor details are not returned for non-existent flavors
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_db_flavor_details, -1)
diff --git a/tempest/api/database/limits/test_limits.py b/tempest/api/database/limits/test_limits.py
index 30d0a77..68a3884 100644
--- a/tempest/api/database/limits/test_limits.py
+++ b/tempest/api/database/limits/test_limits.py
@@ -18,7 +18,6 @@
 
 
 class DatabaseLimitsTest(base.BaseDatabaseTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/database/versions/test_versions.py b/tempest/api/database/versions/test_versions.py
index 26d5cb2..37a7407 100644
--- a/tempest/api/database/versions/test_versions.py
+++ b/tempest/api/database/versions/test_versions.py
@@ -18,7 +18,6 @@
 
 
 class DatabaseVersionsTest(base.BaseDatabaseTest):
-    _interface = 'json'
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/identity/admin/test_roles.py b/tempest/api/identity/admin/test_roles.py
index c6c7dc3..80ad6db 100644
--- a/tempest/api/identity/admin/test_roles.py
+++ b/tempest/api/identity/admin/test_roles.py
@@ -21,7 +21,6 @@
 
 
 class RolesTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/test_roles_negative.py b/tempest/api/identity/admin/test_roles_negative.py
index 58f726a..2c51715 100644
--- a/tempest/api/identity/admin/test_roles_negative.py
+++ b/tempest/api/identity/admin/test_roles_negative.py
@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import uuid
 
 from tempest.api.identity import base
@@ -22,7 +23,6 @@
 
 
 class RolesNegativeTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     def _get_role_params(self):
         self.data.setup_test_user()
@@ -35,7 +35,7 @@
     @test.attr(type=['negative', 'gate'])
     def test_list_roles_by_unauthorized_user(self):
         # Non-administrator user should not be able to list roles
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_roles)
 
     @test.attr(type=['negative', 'gate'])
@@ -43,7 +43,7 @@
         # Request to list roles without a valid token should fail
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.list_roles)
+        self.assertRaises(lib_exc.Unauthorized, self.client.list_roles)
         self.client.auth_provider.clear_auth()
 
     @test.attr(type=['negative', 'gate'])
@@ -55,7 +55,7 @@
     def test_create_role_by_unauthorized_user(self):
         # Non-administrator user should not be able to create role
         role_name = data_utils.rand_name(name='role-')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.create_role, role_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -64,7 +64,7 @@
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
         role_name = data_utils.rand_name(name='role-')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.client.create_role, role_name)
         self.client.auth_provider.clear_auth()
 
@@ -75,7 +75,7 @@
         body = self.client.create_role(role_name)
         role1_id = body.get('id')
         self.addCleanup(self.client.delete_role, role1_id)
-        self.assertRaises(exceptions.Conflict, self.client.create_role,
+        self.assertRaises(lib_exc.Conflict, self.client.create_role,
                           role_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -85,7 +85,7 @@
         body = self.client.create_role(role_name)
         self.data.roles.append(body)
         role_id = body.get('id')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.delete_role, role_id)
 
     @test.attr(type=['negative', 'gate'])
@@ -97,7 +97,7 @@
         role_id = body.get('id')
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.client.delete_role,
                           role_id)
         self.client.auth_provider.clear_auth()
@@ -106,7 +106,7 @@
     def test_delete_role_non_existent(self):
         # Attempt to delete a non existent role should fail
         non_existent_role = str(uuid.uuid4().hex)
-        self.assertRaises(exceptions.NotFound, self.client.delete_role,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_role,
                           non_existent_role)
 
     @test.attr(type=['negative', 'gate'])
@@ -114,7 +114,7 @@
         # Non-administrator user should not be authorized to
         # assign a role to user
         (user, tenant, role) = self._get_role_params()
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.assign_user_role,
                           tenant['id'], user['id'], role['id'])
 
@@ -124,7 +124,7 @@
         (user, tenant, role) = self._get_role_params()
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.client.assign_user_role, tenant['id'],
                           user['id'], role['id'])
         self.client.auth_provider.clear_auth()
@@ -134,7 +134,7 @@
         # Attempt to assign a non existent role to user should fail
         (user, tenant, role) = self._get_role_params()
         non_existent_role = str(uuid.uuid4().hex)
-        self.assertRaises(exceptions.NotFound, self.client.assign_user_role,
+        self.assertRaises(lib_exc.NotFound, self.client.assign_user_role,
                           tenant['id'], user['id'], non_existent_role)
 
     @test.attr(type=['negative', 'gate'])
@@ -142,7 +142,7 @@
         # Attempt to assign a role on a non existent tenant should fail
         (user, tenant, role) = self._get_role_params()
         non_existent_tenant = str(uuid.uuid4().hex)
-        self.assertRaises(exceptions.NotFound, self.client.assign_user_role,
+        self.assertRaises(lib_exc.NotFound, self.client.assign_user_role,
                           non_existent_tenant, user['id'], role['id'])
 
     @test.attr(type=['negative', 'gate'])
@@ -150,7 +150,7 @@
         # Duplicate user role should not get assigned
         (user, tenant, role) = self._get_role_params()
         self.client.assign_user_role(tenant['id'], user['id'], role['id'])
-        self.assertRaises(exceptions.Conflict, self.client.assign_user_role,
+        self.assertRaises(lib_exc.Conflict, self.client.assign_user_role,
                           tenant['id'], user['id'], role['id'])
 
     @test.attr(type=['negative', 'gate'])
@@ -161,7 +161,7 @@
         self.client.assign_user_role(tenant['id'],
                                      user['id'],
                                      role['id'])
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.remove_user_role,
                           tenant['id'], user['id'], role['id'])
 
@@ -174,7 +174,7 @@
                                      role['id'])
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.client.remove_user_role, tenant['id'],
                           user['id'], role['id'])
         self.client.auth_provider.clear_auth()
@@ -187,7 +187,7 @@
                                      user['id'],
                                      role['id'])
         non_existent_role = str(uuid.uuid4().hex)
-        self.assertRaises(exceptions.NotFound, self.client.remove_user_role,
+        self.assertRaises(lib_exc.NotFound, self.client.remove_user_role,
                           tenant['id'], user['id'], non_existent_role)
 
     @test.attr(type=['negative', 'gate'])
@@ -198,7 +198,7 @@
                                      user['id'],
                                      role['id'])
         non_existent_tenant = str(uuid.uuid4().hex)
-        self.assertRaises(exceptions.NotFound, self.client.remove_user_role,
+        self.assertRaises(lib_exc.NotFound, self.client.remove_user_role,
                           non_existent_tenant, user['id'], role['id'])
 
     @test.attr(type=['negative', 'gate'])
@@ -207,7 +207,7 @@
         # a user's roles
         (user, tenant, role) = self._get_role_params()
         self.client.assign_user_role(tenant['id'], user['id'], role['id'])
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_user_roles, tenant['id'],
                           user['id'])
 
@@ -218,7 +218,7 @@
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
         try:
-            self.assertRaises(exceptions.Unauthorized,
+            self.assertRaises(lib_exc.Unauthorized,
                               self.client.list_user_roles, tenant['id'],
                               user['id'])
         finally:
diff --git a/tempest/api/identity/admin/test_services.py b/tempest/api/identity/admin/test_services.py
index 03d6e35..af38afc 100644
--- a/tempest/api/identity/admin/test_services.py
+++ b/tempest/api/identity/admin/test_services.py
@@ -14,21 +14,20 @@
 #    under the License.
 
 from six import moves
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.identity import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
 class ServicesTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     def _del_service(self, service_id):
         # Deleting the service created in this method
         self.client.delete_service(service_id)
         # Checking whether service is deleted successfully
-        self.assertRaises(exceptions.NotFound, self.client.get_service,
+        self.assertRaises(lib_exc.NotFound, self.client.get_service,
                           service_id)
 
     @test.attr(type='smoke')
diff --git a/tempest/api/identity/admin/test_tenant_negative.py b/tempest/api/identity/admin/test_tenant_negative.py
index 75f0152..16ea96a 100644
--- a/tempest/api/identity/admin/test_tenant_negative.py
+++ b/tempest/api/identity/admin/test_tenant_negative.py
@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import uuid
 
 from tempest.api.identity import base
@@ -22,12 +23,11 @@
 
 
 class TenantsNegativeTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @test.attr(type=['negative', 'gate'])
     def test_list_tenants_by_unauthorized_user(self):
         # Non-administrator user should not be able to list tenants
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_tenants)
 
     @test.attr(type=['negative', 'gate'])
@@ -35,7 +35,7 @@
         # Request to list tenants without a valid token should fail
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.list_tenants)
+        self.assertRaises(lib_exc.Unauthorized, self.client.list_tenants)
         self.client.auth_provider.clear_auth()
 
     @test.attr(type=['negative', 'gate'])
@@ -44,7 +44,7 @@
         tenant_name = data_utils.rand_name(name='tenant-')
         tenant = self.client.create_tenant(tenant_name)
         self.data.tenants.append(tenant)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.delete_tenant, tenant['id'])
 
     @test.attr(type=['negative', 'gate'])
@@ -55,14 +55,14 @@
         self.data.tenants.append(tenant)
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.delete_tenant,
+        self.assertRaises(lib_exc.Unauthorized, self.client.delete_tenant,
                           tenant['id'])
         self.client.auth_provider.clear_auth()
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_non_existent_tenant(self):
         # Attempt to delete a non existent tenant should fail
-        self.assertRaises(exceptions.NotFound, self.client.delete_tenant,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_tenant,
                           str(uuid.uuid4().hex))
 
     @test.attr(type=['negative', 'gate'])
@@ -76,14 +76,14 @@
 
         self.addCleanup(self.client.delete_tenant, tenant1_id)
         self.addCleanup(self.data.tenants.remove, tenant)
-        self.assertRaises(exceptions.Conflict, self.client.create_tenant,
+        self.assertRaises(lib_exc.Conflict, self.client.create_tenant,
                           tenant_name)
 
     @test.attr(type=['negative', 'gate'])
     def test_create_tenant_by_unauthorized_user(self):
         # Non-administrator user should not be authorized to create a tenant
         tenant_name = data_utils.rand_name(name='tenant-')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.create_tenant, tenant_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -92,7 +92,7 @@
         tenant_name = data_utils.rand_name(name='tenant-')
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.create_tenant,
+        self.assertRaises(lib_exc.Unauthorized, self.client.create_tenant,
                           tenant_name)
         self.client.auth_provider.clear_auth()
 
@@ -112,7 +112,7 @@
     @test.attr(type=['negative', 'gate'])
     def test_update_non_existent_tenant(self):
         # Attempt to update a non existent tenant should fail
-        self.assertRaises(exceptions.NotFound, self.client.update_tenant,
+        self.assertRaises(lib_exc.NotFound, self.client.update_tenant,
                           str(uuid.uuid4().hex))
 
     @test.attr(type=['negative', 'gate'])
@@ -121,7 +121,7 @@
         tenant_name = data_utils.rand_name(name='tenant-')
         tenant = self.client.create_tenant(tenant_name)
         self.data.tenants.append(tenant)
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.update_tenant, tenant['id'])
 
     @test.attr(type=['negative', 'gate'])
@@ -132,6 +132,6 @@
         self.data.tenants.append(tenant)
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.update_tenant,
+        self.assertRaises(lib_exc.Unauthorized, self.client.update_tenant,
                           tenant['id'])
         self.client.auth_provider.clear_auth()
diff --git a/tempest/api/identity/admin/test_tenants.py b/tempest/api/identity/admin/test_tenants.py
index 549e952..cfae3a1 100644
--- a/tempest/api/identity/admin/test_tenants.py
+++ b/tempest/api/identity/admin/test_tenants.py
@@ -21,7 +21,6 @@
 
 
 class TenantsTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_tenant_list_delete(self):
diff --git a/tempest/api/identity/admin/test_tokens.py b/tempest/api/identity/admin/test_tokens.py
index bec621c..5323fde 100644
--- a/tempest/api/identity/admin/test_tokens.py
+++ b/tempest/api/identity/admin/test_tokens.py
@@ -19,7 +19,6 @@
 
 
 class TokensTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_create_get_delete_token(self):
diff --git a/tempest/api/identity/admin/test_users.py b/tempest/api/identity/admin/test_users.py
index 25312e8..9159468 100644
--- a/tempest/api/identity/admin/test_users.py
+++ b/tempest/api/identity/admin/test_users.py
@@ -21,7 +21,6 @@
 
 
 class UsersTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/test_users_negative.py b/tempest/api/identity/admin/test_users_negative.py
index c039da6..db8c564 100644
--- a/tempest/api/identity/admin/test_users_negative.py
+++ b/tempest/api/identity/admin/test_users_negative.py
@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import uuid
 
 from tempest.api.identity import base
@@ -22,7 +23,6 @@
 
 
 class UsersNegativeTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -35,7 +35,7 @@
     def test_create_user_by_unauthorized_user(self):
         # Non-administrator should not be authorized to create a user
         self.data.setup_test_tenant()
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.create_user, self.alt_user,
                           self.alt_password, self.data.tenant['id'],
                           self.alt_email)
@@ -60,14 +60,14 @@
     def test_create_user_with_duplicate_name(self):
         # Duplicate user should not be created
         self.data.setup_test_user()
-        self.assertRaises(exceptions.Conflict, self.client.create_user,
+        self.assertRaises(lib_exc.Conflict, self.client.create_user,
                           self.data.test_user, self.data.test_password,
                           self.data.tenant['id'], self.data.test_email)
 
     @test.attr(type=['negative', 'gate'])
     def test_create_user_for_non_existent_tenant(self):
         # Attempt to create a user in a non-existent tenant should fail
-        self.assertRaises(exceptions.NotFound, self.client.create_user,
+        self.assertRaises(lib_exc.NotFound, self.client.create_user,
                           self.alt_user, self.alt_password, '49ffgg99999',
                           self.alt_email)
 
@@ -79,7 +79,7 @@
         token = self.client.auth_provider.get_token()
         # Delete the token from database
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.create_user,
+        self.assertRaises(lib_exc.Unauthorized, self.client.create_user,
                           self.alt_user, self.alt_password,
                           self.data.tenant['id'], self.alt_email)
 
@@ -101,7 +101,7 @@
         # Attempt to update a user non-existent user should fail
         user_name = data_utils.rand_name('user-')
         non_existent_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound, self.client.update_user,
+        self.assertRaises(lib_exc.NotFound, self.client.update_user,
                           non_existent_id, name=user_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -112,7 +112,7 @@
         token = self.client.auth_provider.get_token()
         # Delete the token from database
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.update_user,
+        self.assertRaises(lib_exc.Unauthorized, self.client.update_user,
                           self.alt_user)
 
         # Unset the token to allow further tests to generate a new token
@@ -122,21 +122,21 @@
     def test_update_user_by_unauthorized_user(self):
         # Non-administrator should not be authorized to update user
         self.data.setup_test_tenant()
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.update_user, self.alt_user)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_users_by_unauthorized_user(self):
         # Non-administrator user should not be authorized to delete a user
         self.data.setup_test_user()
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.delete_user,
                           self.data.user['id'])
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_non_existent_user(self):
         # Attempt to delete a non-existent user should fail
-        self.assertRaises(exceptions.NotFound, self.client.delete_user,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_user,
                           'junk12345123')
 
     @test.attr(type=['negative', 'gate'])
@@ -147,7 +147,7 @@
         token = self.client.auth_provider.get_token()
         # Delete the token from database
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.delete_user,
+        self.assertRaises(lib_exc.Unauthorized, self.client.delete_user,
                           self.alt_user)
 
         # Unset the token to allow further tests to generate a new token
@@ -158,7 +158,7 @@
         # Disabled user's token should not get authenticated
         self.data.setup_test_user()
         self.disable_user(self.data.test_user)
-        self.assertRaises(exceptions.Unauthorized, self.token_client.auth,
+        self.assertRaises(lib_exc.Unauthorized, self.token_client.auth,
                           self.data.test_user,
                           self.data.test_password,
                           self.data.test_tenant)
@@ -168,7 +168,7 @@
         # User's token for a disabled tenant should not be authenticated
         self.data.setup_test_user()
         self.disable_tenant(self.data.test_tenant)
-        self.assertRaises(exceptions.Unauthorized, self.token_client.auth,
+        self.assertRaises(lib_exc.Unauthorized, self.token_client.auth,
                           self.data.test_user,
                           self.data.test_password,
                           self.data.test_tenant)
@@ -177,7 +177,7 @@
     def test_authentication_with_invalid_tenant(self):
         # User's token for an invalid tenant should not be authenticated
         self.data.setup_test_user()
-        self.assertRaises(exceptions.Unauthorized, self.token_client.auth,
+        self.assertRaises(lib_exc.Unauthorized, self.token_client.auth,
                           self.data.test_user,
                           self.data.test_password,
                           'junktenant1234')
@@ -186,7 +186,7 @@
     def test_authentication_with_invalid_username(self):
         # Non-existent user's token should not get authenticated
         self.data.setup_test_user()
-        self.assertRaises(exceptions.Unauthorized, self.token_client.auth,
+        self.assertRaises(lib_exc.Unauthorized, self.token_client.auth,
                           'junkuser123', self.data.test_password,
                           self.data.test_tenant)
 
@@ -194,7 +194,7 @@
     def test_authentication_with_invalid_password(self):
         # User's token with invalid password should not be authenticated
         self.data.setup_test_user()
-        self.assertRaises(exceptions.Unauthorized, self.token_client.auth,
+        self.assertRaises(lib_exc.Unauthorized, self.token_client.auth,
                           self.data.test_user, 'junkpass1234',
                           self.data.test_tenant)
 
@@ -202,7 +202,7 @@
     def test_get_users_by_unauthorized_user(self):
         # Non-administrator user should not be authorized to get user list
         self.data.setup_test_user()
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.get_users)
 
     @test.attr(type=['negative', 'gate'])
@@ -210,7 +210,7 @@
         # Request to get list of users without a valid token should fail
         token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
-        self.assertRaises(exceptions.Unauthorized, self.client.get_users)
+        self.assertRaises(lib_exc.Unauthorized, self.client.get_users)
         self.client.auth_provider.clear_auth()
 
     @test.attr(type=['negative', 'gate'])
@@ -225,5 +225,5 @@
         invalid_id.append('!@#()$%^&*?<>{}[]')
         # List the users with invalid tenant id
         for invalid in invalid_id:
-            self.assertRaises(exceptions.NotFound,
+            self.assertRaises(lib_exc.NotFound,
                               self.client.list_users_for_tenant, invalid)
diff --git a/tempest/api/identity/admin/v3/test_credentials.py b/tempest/api/identity/admin/v3/test_credentials.py
index 6f2f6d4..f22ceec 100644
--- a/tempest/api/identity/admin/v3/test_credentials.py
+++ b/tempest/api/identity/admin/v3/test_credentials.py
@@ -19,7 +19,6 @@
 
 
 class CredentialsTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/v3/test_default_project_id.py b/tempest/api/identity/admin/v3/test_default_project_id.py
index bd29cb8..72d323a 100644
--- a/tempest/api/identity/admin/v3/test_default_project_id.py
+++ b/tempest/api/identity/admin/v3/test_default_project_id.py
@@ -18,7 +18,6 @@
 
 
 class TestDefaultProjectId (base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -74,8 +73,7 @@
                                            domain_name=dom_name)
         auth_provider = auth.KeystoneV3AuthProvider(creds)
         creds = auth_provider.fill_credentials()
-        admin_client = clients.Manager(interface=self._interface,
-                                       credentials=creds)
+        admin_client = clients.Manager(credentials=creds)
 
         # verify the user's token and see that it is scoped to the project
         token, auth_data = admin_client.auth_provider.get_auth()
diff --git a/tempest/api/identity/admin/v3/test_domains.py b/tempest/api/identity/admin/v3/test_domains.py
index c1bc705..0914674 100644
--- a/tempest/api/identity/admin/v3/test_domains.py
+++ b/tempest/api/identity/admin/v3/test_domains.py
@@ -20,7 +20,6 @@
 
 
 class DomainsTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     def _delete_domain(self, domain_id):
         # It is necessary to disable the domain before deleting,
@@ -62,10 +61,7 @@
         self.assertIsNotNone(domain['id'])
         self.assertEqual(d_name, domain['name'])
         self.assertEqual(d_desc, domain['description'])
-        if self._interface == "json":
-            self.assertEqual(True, domain['enabled'])
-        else:
-            self.assertEqual('true', str(domain['enabled']).lower())
+        self.assertEqual(True, domain['enabled'])
         new_desc = data_utils.rand_name('new-desc-')
         new_name = data_utils.rand_name('new-name-')
 
diff --git a/tempest/api/identity/admin/v3/test_endpoints.py b/tempest/api/identity/admin/v3/test_endpoints.py
index eed0eb5..2283c21 100644
--- a/tempest/api/identity/admin/v3/test_endpoints.py
+++ b/tempest/api/identity/admin/v3/test_endpoints.py
@@ -19,7 +19,6 @@
 
 
 class EndPointsTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/v3/test_endpoints_negative.py b/tempest/api/identity/admin/v3/test_endpoints_negative.py
index 9da0a57..9846010 100644
--- a/tempest/api/identity/admin/v3/test_endpoints_negative.py
+++ b/tempest/api/identity/admin/v3/test_endpoints_negative.py
@@ -22,7 +22,6 @@
 
 
 class EndpointsNegativeTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/v3/test_groups.py b/tempest/api/identity/admin/v3/test_groups.py
index d8c7063..6dfddb0 100644
--- a/tempest/api/identity/admin/v3/test_groups.py
+++ b/tempest/api/identity/admin/v3/test_groups.py
@@ -19,7 +19,6 @@
 
 
 class GroupsV3TestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/v3/test_list_projects.py b/tempest/api/identity/admin/v3/test_list_projects.py
index c0187f9..24b130c 100644
--- a/tempest/api/identity/admin/v3/test_list_projects.py
+++ b/tempest/api/identity/admin/v3/test_list_projects.py
@@ -19,7 +19,6 @@
 
 
 class ListProjectsTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/v3/test_list_users.py b/tempest/api/identity/admin/v3/test_list_users.py
index e728867..a6c3309 100644
--- a/tempest/api/identity/admin/v3/test_list_users.py
+++ b/tempest/api/identity/admin/v3/test_list_users.py
@@ -19,7 +19,6 @@
 
 
 class UsersV3TestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     def _list_users_with_params(self, params, key, expected, not_expected):
         # Helper method to list users filtered with params and
diff --git a/tempest/api/identity/admin/v3/test_policies.py b/tempest/api/identity/admin/v3/test_policies.py
index 23df13d..0d5dc47 100644
--- a/tempest/api/identity/admin/v3/test_policies.py
+++ b/tempest/api/identity/admin/v3/test_policies.py
@@ -19,7 +19,6 @@
 
 
 class PoliciesTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     def _delete_policy(self, policy_id):
         self.policy_client.delete_policy(policy_id)
diff --git a/tempest/api/identity/admin/v3/test_projects.py b/tempest/api/identity/admin/v3/test_projects.py
index 2cf6458..d879c7a 100644
--- a/tempest/api/identity/admin/v3/test_projects.py
+++ b/tempest/api/identity/admin/v3/test_projects.py
@@ -19,7 +19,6 @@
 
 
 class ProjectsTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_project_create_with_description(self):
diff --git a/tempest/api/identity/admin/v3/test_projects_negative.py b/tempest/api/identity/admin/v3/test_projects_negative.py
index f5e832b..fc013c5 100644
--- a/tempest/api/identity/admin/v3/test_projects_negative.py
+++ b/tempest/api/identity/admin/v3/test_projects_negative.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.identity import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -20,12 +22,11 @@
 
 
 class ProjectsNegativeTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @test.attr(type=['negative', 'gate'])
     def test_list_projects_by_unauthorized_user(self):
         # Non-admin user should not be able to list projects
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.non_admin_client.list_projects)
 
     @test.attr(type=['negative', 'gate'])
@@ -36,14 +37,14 @@
         self.data.projects.append(project)
 
         self.assertRaises(
-            exceptions.Conflict, self.client.create_project, project_name)
+            lib_exc.Conflict, self.client.create_project, project_name)
 
     @test.attr(type=['negative', 'gate'])
     def test_create_project_by_unauthorized_user(self):
         # Non-admin user should not be authorized to create a project
         project_name = data_utils.rand_name('project-')
         self.assertRaises(
-            exceptions.Unauthorized, self.non_admin_client.create_project,
+            lib_exc.Unauthorized, self.non_admin_client.create_project,
             project_name)
 
     @test.attr(type=['negative', 'gate'])
@@ -66,11 +67,11 @@
         project = self.client.create_project(project_name)
         self.data.projects.append(project)
         self.assertRaises(
-            exceptions.Unauthorized, self.non_admin_client.delete_project,
+            lib_exc.Unauthorized, self.non_admin_client.delete_project,
             project['id'])
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_non_existent_project(self):
         # Attempt to delete a non existent project should fail
-        self.assertRaises(exceptions.NotFound, self.client.delete_project,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_project,
                           data_utils.rand_uuid_hex())
diff --git a/tempest/api/identity/admin/v3/test_regions.py b/tempest/api/identity/admin/v3/test_regions.py
index c71cbf3..359c0cf 100644
--- a/tempest/api/identity/admin/v3/test_regions.py
+++ b/tempest/api/identity/admin/v3/test_regions.py
@@ -13,14 +13,14 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.identity import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
 class RegionsTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -40,7 +40,7 @@
 
     def _delete_region(self, region_id):
         self.client.delete_region(region_id)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_region, region_id)
 
     @test.attr(type='gate')
diff --git a/tempest/api/identity/admin/v3/test_roles.py b/tempest/api/identity/admin/v3/test_roles.py
index b8b309d..15ca21e 100644
--- a/tempest/api/identity/admin/v3/test_roles.py
+++ b/tempest/api/identity/admin/v3/test_roles.py
@@ -19,7 +19,6 @@
 
 
 class RolesV3TestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/identity/admin/v3/test_services.py b/tempest/api/identity/admin/v3/test_services.py
index 9e45b50..13e6d66 100644
--- a/tempest/api/identity/admin/v3/test_services.py
+++ b/tempest/api/identity/admin/v3/test_services.py
@@ -13,20 +13,20 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.identity import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
 class ServicesTestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     def _del_service(self, service_id):
         # Used for deleting the services created in this class
         self.service_client.delete_service(service_id)
         # Checking whether service is deleted successfully
-        self.assertRaises(exceptions.NotFound, self.service_client.get_service,
+        self.assertRaises(lib_exc.NotFound, self.service_client.get_service,
                           service_id)
 
     @test.attr(type='smoke')
diff --git a/tempest/api/identity/admin/v3/test_tokens.py b/tempest/api/identity/admin/v3/test_tokens.py
index f0acfdf..36be098 100644
--- a/tempest/api/identity/admin/v3/test_tokens.py
+++ b/tempest/api/identity/admin/v3/test_tokens.py
@@ -13,14 +13,14 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.identity import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
 class TokensV3TestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @test.attr(type='smoke')
     def test_tokens(self):
@@ -44,7 +44,7 @@
         self.assertEqual(token_details['user']['name'], u_name)
         # Perform Delete Token
         self.client.delete_token(subject_token)
-        self.assertRaises(exceptions.NotFound, self.client.get_token,
+        self.assertRaises(lib_exc.NotFound, self.client.get_token,
                           subject_token)
 
     @test.attr(type='gate')
diff --git a/tempest/api/identity/admin/v3/test_trusts.py b/tempest/api/identity/admin/v3/test_trusts.py
index cd28e96..fd62004 100644
--- a/tempest/api/identity/admin/v3/test_trusts.py
+++ b/tempest/api/identity/admin/v3/test_trusts.py
@@ -13,9 +13,11 @@
 import datetime
 import re
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.identity import base
-from tempest import auth
 from tempest import clients
+from tempest.common import cred_provider
 from tempest.common.utils import data_utils
 from tempest import config
 from tempest import exceptions
@@ -87,13 +89,11 @@
         self.assertIsNotNone(self.trustee_user_id)
 
         # Initialize a new client with the trustor credentials
-        creds = auth.get_credentials(
+        creds = cred_provider.get_credentials(
             username=self.trustor_username,
             password=self.trustor_password,
             tenant_name=self.trustor_project_name)
-        os = clients.Manager(
-            credentials=creds,
-            interface=self._interface)
+        os = clients.Manager(credentials=creds)
         self.trustor_client = os.identity_v3_client
 
     def cleanup_user_and_roles(self):
@@ -166,26 +166,25 @@
             self.trust_id, self.delegated_role_id)
 
         # And that we don't find not_delegated_role
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.trustor_client.get_trust_role,
                           self.trust_id,
                           self.not_delegated_role_id)
 
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.trustor_client.check_trust_role,
                           self.trust_id,
                           self.not_delegated_role_id)
 
     def delete_trust(self):
         self.trustor_client.delete_trust(self.trust_id)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.trustor_client.get_trust,
                           self.trust_id)
         self.trust_id = None
 
 
 class TrustsV3TestJSON(BaseTrustsV3Test):
-    _interface = 'json'
 
     def setUp(self):
         super(TrustsV3TestJSON, self).setUp()
diff --git a/tempest/api/identity/admin/v3/test_users.py b/tempest/api/identity/admin/v3/test_users.py
index 4f3ec05..2481d9d 100644
--- a/tempest/api/identity/admin/v3/test_users.py
+++ b/tempest/api/identity/admin/v3/test_users.py
@@ -19,7 +19,6 @@
 
 
 class UsersV3TestJSON(base.BaseIdentityV3AdminTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_user_update(self):
diff --git a/tempest/api/identity/base.py b/tempest/api/identity/base.py
index 08bfd4f..8f07a6a 100644
--- a/tempest/api/identity/base.py
+++ b/tempest/api/identity/base.py
@@ -13,12 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 
-from tempest import auth
 from tempest import clients
+from tempest.common import cred_provider
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest.openstack.common import log as logging
 import tempest.test
 
@@ -31,8 +31,8 @@
     @classmethod
     def resource_setup(cls):
         super(BaseIdentityAdminTest, cls).resource_setup()
-        cls.os_adm = clients.AdminManager(interface=cls._interface)
-        cls.os = clients.Manager(interface=cls._interface)
+        cls.os_adm = clients.AdminManager()
+        cls.os = clients.Manager()
 
     @classmethod
     def disable_user(cls, user_name):
@@ -149,11 +149,11 @@
 
         @property
         def test_credentials(self):
-            return auth.get_credentials(username=self.test_user,
-                                        user_id=self.user['id'],
-                                        password=self.test_password,
-                                        tenant_name=self.test_tenant,
-                                        tenant_id=self.tenant['id'])
+            return cred_provider.get_credentials(username=self.test_user,
+                                                 user_id=self.user['id'],
+                                                 password=self.test_password,
+                                                 tenant_name=self.test_tenant,
+                                                 tenant_id=self.tenant['id'])
 
         def setup_test_user(self):
             """Set up a test user."""
@@ -226,7 +226,7 @@
                     func(item['id'], **kwargs)
                 else:
                     func(item['id'])
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
             except Exception:
                 LOG.exception("Unexpected exception occurred in %s deletion."
diff --git a/tempest/api/identity/test_extension.py b/tempest/api/identity/test_extension.py
index e3badfc..bbc4c13 100644
--- a/tempest/api/identity/test_extension.py
+++ b/tempest/api/identity/test_extension.py
@@ -18,7 +18,6 @@
 
 
 class ExtensionTestJSON(base.BaseIdentityV2AdminTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_list_extensions(self):
diff --git a/tempest/api/image/base.py b/tempest/api/image/base.py
index 12f3fdd..344742b 100644
--- a/tempest/api/image/base.py
+++ b/tempest/api/image/base.py
@@ -13,12 +13,12 @@
 #    under the License.
 
 import cStringIO as StringIO
+from tempest_lib import exceptions as lib_exc
 
 from tempest import clients
 from tempest.common import credentials
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest.openstack.common import log as logging
 import tempest.test
 
@@ -35,7 +35,6 @@
         cls.set_network_resources()
         super(BaseImageTest, cls).resource_setup()
         cls.created_images = []
-        cls._interface = 'json'
         cls.isolated_creds = credentials.get_isolated_credentials(
             cls.__name__, network_resources=cls.network_resources)
         if not CONF.service_available.glance:
@@ -48,7 +47,7 @@
         for image_id in cls.created_images:
             try:
                 cls.client.delete_image(image_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
 
         for image_id in cls.created_images:
diff --git a/tempest/api/image/v1/test_image_members_negative.py b/tempest/api/image/v1/test_image_members_negative.py
index aac63b4..1622791 100644
--- a/tempest/api/image/v1/test_image_members_negative.py
+++ b/tempest/api/image/v1/test_image_members_negative.py
@@ -12,10 +12,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.image import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -25,14 +25,14 @@
     def test_add_member_with_non_existing_image(self):
         # Add member with non existing image.
         non_exist_image = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.add_member,
+        self.assertRaises(lib_exc.NotFound, self.client.add_member,
                           self.alt_tenant_id, non_exist_image)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_member_with_non_existing_image(self):
         # Delete member with non existing image.
         non_exist_image = data_utils.rand_uuid()
-        self.assertRaises(exceptions.NotFound, self.client.delete_member,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_member,
                           self.alt_tenant_id, non_exist_image)
 
     @test.attr(type=['negative', 'gate'])
@@ -40,13 +40,13 @@
         # Delete member with non existing tenant.
         image_id = self._create_image()
         non_exist_tenant = data_utils.rand_uuid_hex()
-        self.assertRaises(exceptions.NotFound, self.client.delete_member,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_member,
                           non_exist_tenant, image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_image_without_membership(self):
         # Image is hidden from another tenants.
         image_id = self._create_image()
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.alt_img_cli.get_image,
                           image_id)
diff --git a/tempest/api/image/v1/test_images_negative.py b/tempest/api/image/v1/test_images_negative.py
index 66556e0..b144a83 100644
--- a/tempest/api/image/v1/test_images_negative.py
+++ b/tempest/api/image/v1/test_images_negative.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.image import base
 from tempest import exceptions
 from tempest import test
@@ -35,7 +37,7 @@
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_with_invalid_image_id(self):
         # An image should not be deleted with invalid image id
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           '!@$%^&*()')
 
     @test.attr(type=['negative', 'gate'])
@@ -43,28 +45,28 @@
         # Return an error while trying to delete a non-existent image
 
         non_existent_image_id = '11a22b9-12a9-5555-cc11-00ab112223fa'
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           non_existent_image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_blank_id(self):
         # Return an error while trying to delete an image with blank Id
-        self.assertRaises(exceptions.NotFound, self.client.delete_image, '')
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image, '')
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_non_hex_string_id(self):
         # Return an error while trying to delete an image with non hex id
         image_id = '11a22b9-120q-5555-cc11-00ab112223gj'
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_negative_image_id(self):
         # Return an error while trying to delete an image with negative id
-        self.assertRaises(exceptions.NotFound, self.client.delete_image, -1)
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image, -1)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_id_is_over_35_character_limit(self):
         # Return an error while trying to delete image with id over limit
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           '11a22b9-12a9-5555-cc11-00ab112223fa-3fac')
diff --git a/tempest/api/image/v2/test_images_member.py b/tempest/api/image/v2/test_images_member.py
index ec1cf14..956829e 100644
--- a/tempest/api/image/v2/test_images_member.py
+++ b/tempest/api/image/v2/test_images_member.py
@@ -15,7 +15,6 @@
 
 
 class ImagesMemberTest(base.BaseV2MemberImageTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_image_share_accept(self):
diff --git a/tempest/api/image/v2/test_images_member_negative.py b/tempest/api/image/v2/test_images_member_negative.py
index 1f8e3d0..4402af9 100644
--- a/tempest/api/image/v2/test_images_member_negative.py
+++ b/tempest/api/image/v2/test_images_member_negative.py
@@ -10,13 +10,14 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.image import base
 from tempest import exceptions
 from tempest import test
 
 
 class ImagesMemberNegativeTest(base.BaseV2MemberImageTest):
-    _interface = 'json'
 
     @test.attr(type=['negative', 'gate'])
     def test_image_share_invalid_status(self):
@@ -35,7 +36,7 @@
                                                self.alt_tenant_id)
         self.assertEqual(member['status'], 'pending')
         self.assertNotIn(image_id, self._list_image_ids_as_alt())
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.os_img_client.update_member_status,
                           image_id, self.alt_tenant_id, 'accepted')
         self.assertNotIn(image_id, self._list_image_ids_as_alt())
diff --git a/tempest/api/image/v2/test_images_negative.py b/tempest/api/image/v2/test_images_negative.py
index fc781b1..d32fc3b 100644
--- a/tempest/api/image/v2/test_images_negative.py
+++ b/tempest/api/image/v2/test_images_negative.py
@@ -16,6 +16,8 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.image import base
 from tempest import exceptions
 from tempest import test
@@ -39,14 +41,14 @@
     def test_get_non_existent_image(self):
         # get the non-existent image
         non_existent_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound, self.client.get_image,
+        self.assertRaises(lib_exc.NotFound, self.client.get_image,
                           non_existent_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_image_null_id(self):
         # get image with image_id = NULL
         image_id = ""
-        self.assertRaises(exceptions.NotFound, self.client.get_image, image_id)
+        self.assertRaises(lib_exc.NotFound, self.client.get_image, image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_delete_deleted_image(self):
@@ -60,24 +62,24 @@
         self.client.wait_for_resource_deletion(image_id)
 
         # get the deleted image
-        self.assertRaises(exceptions.NotFound, self.client.get_image, image_id)
+        self.assertRaises(lib_exc.NotFound, self.client.get_image, image_id)
 
         # delete the deleted image
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_non_existing_image(self):
         # delete non-existent image
         non_existent_image_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           non_existent_image_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_image_null_id(self):
         # delete image with image_id=NULL
         image_id = ""
-        self.assertRaises(exceptions.NotFound, self.client.delete_image,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           image_id)
 
     @test.attr(type=['negative', 'gate'])
diff --git a/tempest/api/image/v2/test_images_tags_negative.py b/tempest/api/image/v2/test_images_tags_negative.py
index aa0a214..5b18862 100644
--- a/tempest/api/image/v2/test_images_tags_negative.py
+++ b/tempest/api/image/v2/test_images_tags_negative.py
@@ -14,9 +14,10 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.image import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -27,7 +28,7 @@
         # Update tag with non existing image.
         tag = data_utils.rand_name('tag-')
         non_exist_image = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound, self.client.add_image_tag,
+        self.assertRaises(lib_exc.NotFound, self.client.add_image_tag,
                           non_exist_image, tag)
 
     @test.attr(type=['negative', 'gate'])
@@ -40,5 +41,5 @@
         image_id = body['id']
         tag = data_utils.rand_name('non-exist-tag-')
         self.addCleanup(self.client.delete_image, image_id)
-        self.assertRaises(exceptions.NotFound, self.client.delete_image_tag,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_image_tag,
                           image_id, tag)
diff --git a/tempest/api/messaging/test_claims.py b/tempest/api/messaging/test_claims.py
index 1aab8d2..c9064b0 100644
--- a/tempest/api/messaging/test_claims.py
+++ b/tempest/api/messaging/test_claims.py
@@ -29,7 +29,6 @@
 
 
 class TestClaims(base.BaseMessagingTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/messaging/test_messages.py b/tempest/api/messaging/test_messages.py
index 3c27ac2..dca95fc 100644
--- a/tempest/api/messaging/test_messages.py
+++ b/tempest/api/messaging/test_messages.py
@@ -26,7 +26,6 @@
 
 
 class TestMessages(base.BaseMessagingTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/messaging/test_queues.py b/tempest/api/messaging/test_queues.py
index accbd17..24656bf 100644
--- a/tempest/api/messaging/test_queues.py
+++ b/tempest/api/messaging/test_queues.py
@@ -16,11 +16,11 @@
 import logging
 
 from six import moves
+from tempest_lib import exceptions as lib_exc
 from testtools import matchers
 
 from tempest.api.messaging import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -42,13 +42,12 @@
         self.assertEqual('', body)
 
         self.delete_queue(queue_name)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.get_queue,
                           queue_name)
 
 
 class TestManageQueue(base.BaseMessagingTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/admin/test_agent_management.py b/tempest/api/network/admin/test_agent_management.py
index e7fd016..20948cc 100644
--- a/tempest/api/network/admin/test_agent_management.py
+++ b/tempest/api/network/admin/test_agent_management.py
@@ -18,7 +18,6 @@
 
 
 class AgentManagementTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/admin/test_dhcp_agent_scheduler.py b/tempest/api/network/admin/test_dhcp_agent_scheduler.py
index a89f25c..4eb6b87 100644
--- a/tempest/api/network/admin/test_dhcp_agent_scheduler.py
+++ b/tempest/api/network/admin/test_dhcp_agent_scheduler.py
@@ -17,7 +17,6 @@
 
 
 class DHCPAgentSchedulersTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/admin/test_external_network_extension.py b/tempest/api/network/admin/test_external_network_extension.py
index 06cce48..6e24f8e 100644
--- a/tempest/api/network/admin/test_external_network_extension.py
+++ b/tempest/api/network/admin/test_external_network_extension.py
@@ -15,7 +15,6 @@
 
 
 class ExternalNetworksTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/admin/test_external_networks_negative.py b/tempest/api/network/admin/test_external_networks_negative.py
index 7dbb347..aa8dd9a 100644
--- a/tempest/api/network/admin/test_external_networks_negative.py
+++ b/tempest/api/network/admin/test_external_networks_negative.py
@@ -13,16 +13,16 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
 
 
 class ExternalNetworksAdminNegativeTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     @test.attr(type=['negative'])
     def test_create_port_with_precreated_floatingip_as_fixed_ip(self):
@@ -47,7 +47,7 @@
         fixed_ips = [{'ip_address': floating_ip_address}]
 
         # create a port which will internally create an instance-ip
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           client.create_port,
                           network_id=CONF.network.public_network_id,
                           fixed_ips=fixed_ips)
diff --git a/tempest/api/network/admin/test_floating_ips_admin_actions.py b/tempest/api/network/admin/test_floating_ips_admin_actions.py
index 62ba1b3..ee3b0bb 100644
--- a/tempest/api/network/admin/test_floating_ips_admin_actions.py
+++ b/tempest/api/network/admin/test_floating_ips_admin_actions.py
@@ -22,7 +22,7 @@
 
 
 class FloatingIPAdminTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
+
     force_tenant_isolation = True
 
     @classmethod
diff --git a/tempest/api/network/admin/test_l3_agent_scheduler.py b/tempest/api/network/admin/test_l3_agent_scheduler.py
index a6de581..05a8e35 100644
--- a/tempest/api/network/admin/test_l3_agent_scheduler.py
+++ b/tempest/api/network/admin/test_l3_agent_scheduler.py
@@ -18,7 +18,6 @@
 
 
 class L3AgentSchedulerTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
diff --git a/tempest/api/network/admin/test_lbaas_agent_scheduler.py b/tempest/api/network/admin/test_lbaas_agent_scheduler.py
index da1af36..8cfd5c2 100644
--- a/tempest/api/network/admin/test_lbaas_agent_scheduler.py
+++ b/tempest/api/network/admin/test_lbaas_agent_scheduler.py
@@ -18,7 +18,6 @@
 
 
 class LBaaSAgentSchedulerTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
diff --git a/tempest/api/network/admin/test_load_balancer_admin_actions.py b/tempest/api/network/admin/test_load_balancer_admin_actions.py
index e81616b..2537b28 100644
--- a/tempest/api/network/admin/test_load_balancer_admin_actions.py
+++ b/tempest/api/network/admin/test_load_balancer_admin_actions.py
@@ -19,7 +19,6 @@
 
 
 class LoadBalancerAdminTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     """
     Test admin actions for load balancer.
diff --git a/tempest/api/network/admin/test_quotas.py b/tempest/api/network/admin/test_quotas.py
index f8dfca9..39850f5 100644
--- a/tempest/api/network/admin/test_quotas.py
+++ b/tempest/api/network/admin/test_quotas.py
@@ -20,7 +20,6 @@
 
 
 class QuotasTest(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
diff --git a/tempest/api/network/base.py b/tempest/api/network/base.py
index 10cda53..4cb1485 100644
--- a/tempest/api/network/base.py
+++ b/tempest/api/network/base.py
@@ -14,6 +14,7 @@
 #    under the License.
 
 import netaddr
+from tempest_lib import exceptions as lib_exc
 
 from tempest import clients
 from tempest.common.utils import data_utils
@@ -49,7 +50,6 @@
         neutron as True
     """
 
-    _interface = 'json'
     force_tenant_isolation = False
 
     # Default to ipv4.
@@ -177,7 +177,7 @@
         try:
             delete_callable(*args, **kwargs)
         # if resource is not found, this means it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     @classmethod
@@ -399,7 +399,7 @@
             try:
                 cls.client.remove_router_interface_with_subnet_id(
                     router['id'], i['fixed_ips'][0]['subnet_id'])
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
         cls.client.delete_router(router['id'])
 
@@ -420,8 +420,7 @@
 
         try:
             creds = cls.isolated_creds.get_admin_creds()
-            cls.os_adm = clients.Manager(
-                credentials=creds, interface=cls._interface)
+            cls.os_adm = clients.Manager(credentials=creds)
         except NotImplementedError:
             msg = ("Missing Administrative Network API credentials "
                    "in configuration.")
diff --git a/tempest/api/network/test_allowed_address_pair.py b/tempest/api/network/test_allowed_address_pair.py
index 57887ac..a4954af 100644
--- a/tempest/api/network/test_allowed_address_pair.py
+++ b/tempest/api/network/test_allowed_address_pair.py
@@ -23,7 +23,6 @@
 
 
 class AllowedAddressPairTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the Neutron Allowed Address Pair API extension using the Tempest
diff --git a/tempest/api/network/test_dhcp_ipv6.py b/tempest/api/network/test_dhcp_ipv6.py
index 1257699..f7a6fb7 100644
--- a/tempest/api/network/test_dhcp_ipv6.py
+++ b/tempest/api/network/test_dhcp_ipv6.py
@@ -16,6 +16,8 @@
 import netaddr
 import random
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -348,7 +350,7 @@
                          fixed_ips=[
                              {'subnet_id': subnet['id'],
                               'ip_address': ip}])
-        self.assertRaisesRegexp(exceptions.Conflict,
+        self.assertRaisesRegexp(lib_exc.Conflict,
                                 "object with that identifier already exists",
                                 self.create_port,
                                 self.network,
diff --git a/tempest/api/network/test_extensions.py b/tempest/api/network/test_extensions.py
index 54c3cb9..2b4ccaf 100644
--- a/tempest/api/network/test_extensions.py
+++ b/tempest/api/network/test_extensions.py
@@ -19,7 +19,6 @@
 
 
 class ExtensionsTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
diff --git a/tempest/api/network/test_extra_dhcp_options.py b/tempest/api/network/test_extra_dhcp_options.py
index bd70323..1faac58 100644
--- a/tempest/api/network/test_extra_dhcp_options.py
+++ b/tempest/api/network/test_extra_dhcp_options.py
@@ -19,7 +19,6 @@
 
 
 class ExtraDHCPOptionsTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations with the Extra DHCP Options Neutron API
diff --git a/tempest/api/network/test_floating_ips.py b/tempest/api/network/test_floating_ips.py
index 1151c5d..43b296c 100644
--- a/tempest/api/network/test_floating_ips.py
+++ b/tempest/api/network/test_floating_ips.py
@@ -24,7 +24,6 @@
 
 
 class FloatingIPTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Quantum API using the REST client for
diff --git a/tempest/api/network/test_floating_ips_negative.py b/tempest/api/network/test_floating_ips_negative.py
index 82f0519..81eedd4 100644
--- a/tempest/api/network/test_floating_ips_negative.py
+++ b/tempest/api/network/test_floating_ips_negative.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -24,7 +26,7 @@
 
 
 class FloatingIPNegativeTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
+
     """
     Test the following negative  operations for floating ips:
 
@@ -49,7 +51,7 @@
 
     @test.attr(type=['negative', 'smoke'])
     def test_create_floatingip_with_port_ext_net_unreachable(self):
-        self.assertRaises(exceptions.NotFound, self.client.create_floatingip,
+        self.assertRaises(lib_exc.NotFound, self.client.create_floatingip,
                           floating_network_id=self.ext_net_id,
                           port_id=self.port['id'],
                           fixed_ip_address=self.port['fixed_ips'][0]
@@ -72,7 +74,7 @@
         floating_ip = body['floatingip']
         self.addCleanup(self.client.delete_floatingip, floating_ip['id'])
         # Associate floating IP to the other port
-        self.assertRaises(exceptions.NotFound, self.client.update_floatingip,
+        self.assertRaises(lib_exc.NotFound, self.client.update_floatingip,
                           floating_ip['id'], port_id=self.port['id'],
                           fixed_ip_address=self.port['fixed_ips'][0]
                           ['ip_address'])
diff --git a/tempest/api/network/test_fwaas_extensions.py b/tempest/api/network/test_fwaas_extensions.py
index 8104567..280c5bb 100644
--- a/tempest/api/network/test_fwaas_extensions.py
+++ b/tempest/api/network/test_fwaas_extensions.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base
 from tempest.common.utils import data_utils
 from tempest import config
@@ -22,7 +24,6 @@
 
 
 class FWaaSExtensionTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
@@ -63,7 +64,7 @@
         try:
             self.client.delete_firewall_policy(policy_id)
         # if policy is not found, this means it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     def _try_delete_rule(self, rule_id):
@@ -71,7 +72,7 @@
         try:
             self.client.delete_firewall_rule(rule_id)
         # if rule is not found, this means it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     def _try_delete_firewall(self, fw_id):
@@ -79,7 +80,7 @@
         try:
             self.client.delete_firewall(fw_id)
         # if firewall is not found, this means it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
         self.client.wait_for_resource_deletion('firewall', fw_id)
diff --git a/tempest/api/network/test_load_balancer.py b/tempest/api/network/test_load_balancer.py
index df76757..107d8cd 100644
--- a/tempest/api/network/test_load_balancer.py
+++ b/tempest/api/network/test_load_balancer.py
@@ -21,7 +21,6 @@
 
 
 class LoadBalancerTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
diff --git a/tempest/api/network/test_metering_extensions.py b/tempest/api/network/test_metering_extensions.py
index 6ba1ea4..c80d0e9 100644
--- a/tempest/api/network/test_metering_extensions.py
+++ b/tempest/api/network/test_metering_extensions.py
@@ -24,7 +24,6 @@
 
 
 class MeteringTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
diff --git a/tempest/api/network/test_networks.py b/tempest/api/network/test_networks.py
index 65aeb24..0df455e 100644
--- a/tempest/api/network/test_networks.py
+++ b/tempest/api/network/test_networks.py
@@ -15,19 +15,18 @@
 import itertools
 
 import netaddr
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.network import base
 from tempest.common import custom_matchers
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
 
 
 class NetworksTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
@@ -280,7 +279,7 @@
         try:
             self.client.delete_network(net_id)
         # if network is not found, this means it was deleted in the test
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     @test.attr(type='smoke')
@@ -300,7 +299,7 @@
         body = self.client.delete_network(net_id)
 
         # Verify that the subnet got automatically deleted.
-        self.assertRaises(exceptions.NotFound, self.client.show_subnet,
+        self.assertRaises(lib_exc.NotFound, self.client.show_subnet,
                           subnet_id)
 
         # Since create_subnet adds the subnet to the delete list, and it is
@@ -399,7 +398,6 @@
 
 
 class BulkNetworkOpsTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
@@ -614,7 +612,7 @@
         self.assertNotIn(subnet_slaac['id'], subnet_ids,
                          "Subnet wasn't deleted")
         self.assertRaisesRegexp(
-            exceptions.Conflict,
+            lib_exc.Conflict,
             "There are one or more ports still in use on the network",
             self.client.delete_network,
             slaac_network['id'])
diff --git a/tempest/api/network/test_networks_negative.py b/tempest/api/network/test_networks_negative.py
index bc3ab68..09bd9c3 100644
--- a/tempest/api/network/test_networks_negative.py
+++ b/tempest/api/network/test_networks_negative.py
@@ -14,41 +14,41 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
 class NetworksNegativeTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     @test.attr(type=['negative', 'smoke'])
     def test_show_non_existent_network(self):
         non_exist_id = data_utils.rand_name('network')
-        self.assertRaises(exceptions.NotFound, self.client.show_network,
+        self.assertRaises(lib_exc.NotFound, self.client.show_network,
                           non_exist_id)
 
     @test.attr(type=['negative', 'smoke'])
     def test_show_non_existent_subnet(self):
         non_exist_id = data_utils.rand_name('subnet')
-        self.assertRaises(exceptions.NotFound, self.client.show_subnet,
+        self.assertRaises(lib_exc.NotFound, self.client.show_subnet,
                           non_exist_id)
 
     @test.attr(type=['negative', 'smoke'])
     def test_show_non_existent_port(self):
         non_exist_id = data_utils.rand_name('port')
-        self.assertRaises(exceptions.NotFound, self.client.show_port,
+        self.assertRaises(lib_exc.NotFound, self.client.show_port,
                           non_exist_id)
 
     @test.attr(type=['negative', 'smoke'])
     def test_update_non_existent_network(self):
         non_exist_id = data_utils.rand_name('network')
-        self.assertRaises(exceptions.NotFound, self.client.update_network,
+        self.assertRaises(lib_exc.NotFound, self.client.update_network,
                           non_exist_id, name="new_name")
 
     @test.attr(type=['negative', 'smoke'])
     def test_delete_non_existent_network(self):
         non_exist_id = data_utils.rand_name('network')
-        self.assertRaises(exceptions.NotFound, self.client.delete_network,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_network,
                           non_exist_id)
diff --git a/tempest/api/network/test_ports.py b/tempest/api/network/test_ports.py
index bf85e90..2460092 100644
--- a/tempest/api/network/test_ports.py
+++ b/tempest/api/network/test_ports.py
@@ -27,7 +27,6 @@
 
 
 class PortsTestJSON(sec_base.BaseSecGroupTest):
-    _interface = 'json'
 
     """
     Test the following operations for ports:
@@ -300,7 +299,6 @@
 
 
 class PortsAdminExtendedAttrsTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index 210a8af..b0ee00d 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -25,7 +25,6 @@
 
 
 class RoutersTest(base.BaseRouterTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/test_routers_negative.py b/tempest/api/network/test_routers_negative.py
index d571e92..655fa58 100644
--- a/tempest/api/network/test_routers_negative.py
+++ b/tempest/api/network/test_routers_negative.py
@@ -14,6 +14,7 @@
 #    under the License.
 
 import netaddr
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.network import base_routers as base
 from tempest.common.utils import data_utils
@@ -25,7 +26,6 @@
 
 
 class RoutersNegativeTest(base.BaseRouterTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -42,7 +42,7 @@
 
     @test.attr(type=['negative', 'smoke'])
     def test_router_add_gateway_invalid_network_returns_404(self):
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.update_router,
                           self.router['id'],
                           external_gateway_info={
@@ -79,26 +79,26 @@
     def test_router_remove_interface_in_use_returns_409(self):
         self.client.add_router_interface_with_subnet_id(
             self.router['id'], self.subnet['id'])
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.delete_router,
                           self.router['id'])
 
     @test.attr(type=['negative', 'smoke'])
     def test_show_non_existent_router_returns_404(self):
         router = data_utils.rand_name('non_exist_router')
-        self.assertRaises(exceptions.NotFound, self.client.show_router,
+        self.assertRaises(lib_exc.NotFound, self.client.show_router,
                           router)
 
     @test.attr(type=['negative', 'smoke'])
     def test_update_non_existent_router_returns_404(self):
         router = data_utils.rand_name('non_exist_router')
-        self.assertRaises(exceptions.NotFound, self.client.update_router,
+        self.assertRaises(lib_exc.NotFound, self.client.update_router,
                           router, name="new_name")
 
     @test.attr(type=['negative', 'smoke'])
     def test_delete_non_existent_router_returns_404(self):
         router = data_utils.rand_name('non_exist_router')
-        self.assertRaises(exceptions.NotFound, self.client.delete_router,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_router,
                           router)
 
 
diff --git a/tempest/api/network/test_security_groups.py b/tempest/api/network/test_security_groups.py
index 415dedd..3d26b48 100644
--- a/tempest/api/network/test_security_groups.py
+++ b/tempest/api/network/test_security_groups.py
@@ -24,7 +24,7 @@
 
 
 class SecGroupTest(base.BaseSecGroupTest):
-    _interface = 'json'
+
     _tenant_network_cidr = CONF.network.tenant_network_cidr
 
     @classmethod
diff --git a/tempest/api/network/test_security_groups_negative.py b/tempest/api/network/test_security_groups_negative.py
index fb51e30..47b218c 100644
--- a/tempest/api/network/test_security_groups_negative.py
+++ b/tempest/api/network/test_security_groups_negative.py
@@ -15,6 +15,8 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base_security_groups as base
 from tempest import config
 from tempest import exceptions
@@ -24,7 +26,7 @@
 
 
 class NegativeSecGroupTest(base.BaseSecGroupTest):
-    _interface = 'json'
+
     _tenant_network_cidr = CONF.network.tenant_network_cidr
 
     @classmethod
@@ -37,20 +39,20 @@
     @test.attr(type=['negative', 'gate'])
     def test_show_non_existent_security_group(self):
         non_exist_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound, self.client.show_security_group,
+        self.assertRaises(lib_exc.NotFound, self.client.show_security_group,
                           non_exist_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_show_non_existent_security_group_rule(self):
         non_exist_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.show_security_group_rule,
                           non_exist_id)
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_non_existent_security_group(self):
         non_exist_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_security_group,
                           non_exist_id
                           )
@@ -88,7 +90,7 @@
         group_ids = ['bad_group_id', non_exist_id]
         for remote_group_id in group_ids:
             self.assertRaises(
-                exceptions.NotFound, self.client.create_security_group_rule,
+                lib_exc.NotFound, self.client.create_security_group_rule,
                 security_group_id=group_create_body['security_group']['id'],
                 protocol='tcp', direction='ingress', ethertype=self.ethertype,
                 remote_group_id=remote_group_id)
@@ -152,7 +154,7 @@
     def test_create_additional_default_security_group_fails(self):
         # Create security group named 'default', it should be failed.
         name = 'default'
-        self.assertRaises(exceptions.Conflict,
+        self.assertRaises(lib_exc.Conflict,
                           self.client.create_security_group,
                           name=name)
 
@@ -175,7 +177,7 @@
 
         # Try creating the same security group rule, it should fail
         self.assertRaises(
-            exceptions.Conflict, self.client.create_security_group_rule,
+            lib_exc.Conflict, self.client.create_security_group_rule,
             security_group_id=body['security_group']['id'],
             protocol='tcp', direction='ingress', ethertype=self.ethertype,
             port_range_min=min_port, port_range_max=max_port)
@@ -184,7 +186,7 @@
     def test_create_security_group_rule_with_non_existent_security_group(self):
         # Create security group rules with not existing security group.
         non_existent_sg = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.create_security_group_rule,
                           security_group_id=non_existent_sg,
                           direction='ingress', ethertype=self.ethertype)
diff --git a/tempest/api/network/test_service_type_management.py b/tempest/api/network/test_service_type_management.py
index 0492fe3..e620ae6 100644
--- a/tempest/api/network/test_service_type_management.py
+++ b/tempest/api/network/test_service_type_management.py
@@ -17,7 +17,6 @@
 
 
 class ServiceTypeManagementTestJSON(base.BaseNetworkTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/network/test_vpnaas_extensions.py b/tempest/api/network/test_vpnaas_extensions.py
index 56e1a05..d869b55 100644
--- a/tempest/api/network/test_vpnaas_extensions.py
+++ b/tempest/api/network/test_vpnaas_extensions.py
@@ -13,17 +13,17 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.network import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
 
 
 class VPNaaSTestJSON(base.BaseAdminNetworkTest):
-    _interface = 'json'
 
     """
     Tests the following operations in the Neutron API using the REST client for
@@ -74,7 +74,7 @@
         try:
             self.client.delete_ipsecpolicy(ipsec_policy_id)
 
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             pass
 
     def _assertExpected(self, expected, actual):
@@ -304,7 +304,7 @@
         self._assertExpected(new_ipsec, updated_ipsec_policy)
         # Verification of ipsec policy delete
         self.client.delete_ipsecpolicy(ipsecpolicy['id'])
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.delete_ipsecpolicy, ipsecpolicy['id'])
 
     @test.attr(type='smoke')
diff --git a/tempest/api/object_storage/base.py b/tempest/api/object_storage/base.py
index 36c9f5a..79a1960 100644
--- a/tempest/api/object_storage/base.py
+++ b/tempest/api/object_storage/base.py
@@ -13,13 +13,13 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.identity import base
 from tempest import clients
 from tempest.common import credentials
 from tempest.common import custom_matchers
 from tempest import config
-from tempest import exceptions
 import tempest.test
 
 CONF = config.CONF
@@ -93,10 +93,10 @@
                 for obj in objlist:
                     try:
                         object_client.delete_object(cont, obj['name'])
-                    except exceptions.NotFound:
+                    except lib_exc.NotFound:
                         pass
                 container_client.delete_container(cont)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
 
     def assertHeaders(self, resp, target, method):
@@ -126,7 +126,7 @@
             return next(r['id'] for r in roles if r['name'] == role_name)
         except StopIteration:
             msg = "Role name '%s' is not found" % role_name
-            raise exceptions.NotFound(msg)
+            raise lib_exc.NotFound(msg)
 
     def _assign_role(self, role_id):
         self.client.assign_user_role(self.tenant['id'],
diff --git a/tempest/api/object_storage/test_account_quotas_negative.py b/tempest/api/object_storage/test_account_quotas_negative.py
index 5a0be54..0e136bf 100644
--- a/tempest/api/object_storage/test_account_quotas_negative.py
+++ b/tempest/api/object_storage/test_account_quotas_negative.py
@@ -15,12 +15,12 @@
 # under the License.
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 
 from tempest.api.object_storage import base
 from tempest import clients
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -85,12 +85,12 @@
         """
 
         # Not able to remove quota
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.account_client.create_account_metadata,
                           {"Quota-Bytes": ""})
 
         # Not able to modify quota
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.account_client.create_account_metadata,
                           {"Quota-Bytes": "100"})
 
@@ -100,6 +100,6 @@
     def test_upload_large_object(self):
         object_name = data_utils.rand_name(name="TestObject")
         data = data_utils.arbitrary_string(30)
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.object_client.create_object,
                           self.container_name, object_name, data)
diff --git a/tempest/api/object_storage/test_account_services_negative.py b/tempest/api/object_storage/test_account_services_negative.py
index ef04387..9acf668 100644
--- a/tempest/api/object_storage/test_account_services_negative.py
+++ b/tempest/api/object_storage/test_account_services_negative.py
@@ -14,9 +14,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest import clients
-from tempest import exceptions
 from tempest import test
 
 
@@ -44,6 +45,6 @@
 
         params = {'format': 'json'}
         # list containers with non-authorized user token
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.account_client.list_account_containers,
                           params=params)
diff --git a/tempest/api/object_storage/test_container_acl_negative.py b/tempest/api/object_storage/test_container_acl_negative.py
index 138d25a..7fe472c 100644
--- a/tempest/api/object_storage/test_container_acl_negative.py
+++ b/tempest/api/object_storage/test_container_acl_negative.py
@@ -14,10 +14,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest import clients
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -47,7 +48,7 @@
             request_part='headers',
             auth_data=None
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.create_object,
                           self.container_name, object_name, 'data', headers={})
 
@@ -63,7 +64,7 @@
             request_part='headers',
             auth_data=None
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.delete_object,
                           self.container_name, object_name)
 
@@ -77,7 +78,7 @@
             request_part='headers',
             auth_data=self.test_auth_data
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.create_object,
                           self.container_name, object_name, 'data', headers={})
 
@@ -94,7 +95,7 @@
             request_part='headers',
             auth_data=self.test_auth_data
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.get_object,
                           self.container_name, object_name)
 
@@ -111,7 +112,7 @@
             request_part='headers',
             auth_data=self.test_auth_data
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.delete_object,
                           self.container_name, object_name)
 
@@ -134,7 +135,7 @@
             request_part='headers',
             auth_data=self.test_auth_data
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.get_object,
                           self.container_name, object_name)
 
@@ -153,7 +154,7 @@
             auth_data=self.test_auth_data
         )
         object_name = data_utils.rand_name(name='Object')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.create_object,
                           self.container_name,
                           object_name, 'data', headers={})
@@ -175,7 +176,7 @@
             auth_data=self.test_auth_data
         )
         object_name = data_utils.rand_name(name='Object')
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.create_object,
                           self.container_name,
                           object_name, 'data', headers={})
@@ -201,7 +202,7 @@
             request_part='headers',
             auth_data=self.test_auth_data
         )
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.delete_object,
                           self.container_name,
                           object_name)
diff --git a/tempest/api/object_storage/test_container_quotas.py b/tempest/api/object_storage/test_container_quotas.py
index 46944ed..12ec6d2 100644
--- a/tempest/api/object_storage/test_container_quotas.py
+++ b/tempest/api/object_storage/test_container_quotas.py
@@ -13,10 +13,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -75,7 +76,7 @@
 
         nbefore = self._get_bytes_used()
 
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.object_client.create_object,
                           self.container_name, object_name, data)
 
@@ -93,7 +94,7 @@
         nbefore = self._get_object_count()
         self.assertEqual(nbefore, QUOTA_COUNT)
 
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.object_client.create_object,
                           self.container_name, "OverQuotaObject", "")
 
diff --git a/tempest/api/object_storage/test_container_staticweb.py b/tempest/api/object_storage/test_container_staticweb.py
index a8e5f9a..8a61911 100644
--- a/tempest/api/object_storage/test_container_staticweb.py
+++ b/tempest/api/object_storage/test_container_staticweb.py
@@ -14,10 +14,11 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -161,5 +162,5 @@
 
         # Request non-existing object
         self.assertRaises(
-            exceptions.NotFound, self.object_client.get_object,
+            lib_exc.NotFound, self.object_client.get_object,
             self.container_name, "notexisting")
diff --git a/tempest/api/object_storage/test_object_expiry.py b/tempest/api/object_storage/test_object_expiry.py
index 5fa209d..be5d50e 100644
--- a/tempest/api/object_storage/test_object_expiry.py
+++ b/tempest/api/object_storage/test_object_expiry.py
@@ -13,11 +13,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
 import time
 
 from tempest.api.object_storage import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -66,7 +66,7 @@
         time.sleep(sleepy_time + 3)
 
         # object should not be there anymore
-        self.assertRaises(exceptions.NotFound, self.object_client.get_object,
+        self.assertRaises(lib_exc.NotFound, self.object_client.get_object,
                           self.container_name, self.object_name)
 
     @test.attr(type='gate')
diff --git a/tempest/api/object_storage/test_object_formpost_negative.py b/tempest/api/object_storage/test_object_formpost_negative.py
index 32f5917..cdd9d2c 100644
--- a/tempest/api/object_storage/test_object_formpost_negative.py
+++ b/tempest/api/object_storage/test_object_formpost_negative.py
@@ -18,9 +18,10 @@
 import time
 import urlparse
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -117,7 +118,7 @@
 
         url = "%s/%s" % (self.container_name, self.object_name)
         exc = self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.object_client.post,
             url, body, headers=headers)
         self.assertIn('FormPost: Form Expired', str(exc))
@@ -133,7 +134,7 @@
 
         url = "%s/%s" % (self.container_name, self.object_name)
         exc = self.assertRaises(
-            exceptions.Unauthorized,
+            lib_exc.Unauthorized,
             self.object_client.post,
             url, body, headers=headers)
         self.assertIn('FormPost: Invalid Signature', str(exc))
diff --git a/tempest/api/object_storage/test_object_slo.py b/tempest/api/object_storage/test_object_slo.py
index 6622349..7b85201 100644
--- a/tempest/api/object_storage/test_object_slo.py
+++ b/tempest/api/object_storage/test_object_slo.py
@@ -15,10 +15,11 @@
 import hashlib
 import json
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 # Each segment, except for the final one, must be at least 1 megabyte
@@ -39,7 +40,7 @@
                 self.object_client.delete_object(
                     self.container_name,
                     obj)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
         self.container_client.delete_container(self.container_name)
         super(ObjectSloTest, self).tearDown()
diff --git a/tempest/api/object_storage/test_object_temp_url_negative.py b/tempest/api/object_storage/test_object_temp_url_negative.py
index b752348..ca34293 100644
--- a/tempest/api/object_storage/test_object_temp_url_negative.py
+++ b/tempest/api/object_storage/test_object_temp_url_negative.py
@@ -19,9 +19,10 @@
 import time
 import urlparse
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.object_storage import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
@@ -104,5 +105,5 @@
         # temp URL is valid for 1 seconds, let's wait 2
         time.sleep(2)
 
-        self.assertRaises(exceptions.Unauthorized,
+        self.assertRaises(lib_exc.Unauthorized,
                           self.object_client.get, url)
diff --git a/tempest/api/orchestration/base.py b/tempest/api/orchestration/base.py
index 97777db..6873756 100644
--- a/tempest/api/orchestration/base.py
+++ b/tempest/api/orchestration/base.py
@@ -12,12 +12,12 @@
 
 import os.path
 
+from tempest_lib import exceptions as lib_exc
 import yaml
 
 from tempest import clients
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest.openstack.common import log as logging
 import tempest.test
 
@@ -59,7 +59,7 @@
     @classmethod
     def _get_identity_admin_client(cls):
         """Returns an instance of the Identity Admin API client."""
-        manager = clients.AdminManager(interface=cls._interface)
+        manager = clients.AdminManager()
         admin_client = manager.identity_client
         return admin_client
 
@@ -84,14 +84,14 @@
         for stack_identifier in cls.stacks:
             try:
                 cls.client.delete_stack(stack_identifier)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
 
         for stack_identifier in cls.stacks:
             try:
                 cls.client.wait_for_stack_status(
                     stack_identifier, 'DELETE_COMPLETE')
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
 
     @classmethod
@@ -125,7 +125,7 @@
         for image_id in cls.images:
             try:
                 cls.images_v2_client.delete_image(image_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
 
     @classmethod
diff --git a/tempest/api/orchestration/stacks/test_soft_conf.py b/tempest/api/orchestration/stacks/test_soft_conf.py
index 8903d4c..220054e 100644
--- a/tempest/api/orchestration/stacks/test_soft_conf.py
+++ b/tempest/api/orchestration/stacks/test_soft_conf.py
@@ -10,10 +10,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.orchestration import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest.openstack.common import log as logging
 from tempest import test
 
@@ -70,14 +71,14 @@
         self.client.delete_software_deploy(deploy_id)
         # Testing that it is really gone
         self.assertRaises(
-            exceptions.NotFound, self.client.get_software_deploy,
+            lib_exc.NotFound, self.client.get_software_deploy,
             self.deployment_id)
 
     def _config_delete(self, config_id):
         self.client.delete_software_config(config_id)
         # Testing that it is really gone
         self.assertRaises(
-            exceptions.NotFound, self.client.get_software_config, config_id)
+            lib_exc.NotFound, self.client.get_software_config, config_id)
 
     @test.attr(type='smoke')
     def test_get_software_config(self):
diff --git a/tempest/api/orchestration/stacks/test_volumes.py b/tempest/api/orchestration/stacks/test_volumes.py
index 6fddb21..322bdf1 100644
--- a/tempest/api/orchestration/stacks/test_volumes.py
+++ b/tempest/api/orchestration/stacks/test_volumes.py
@@ -12,10 +12,11 @@
 
 import logging
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.orchestration import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 
@@ -73,7 +74,7 @@
         # Delete the stack and ensure the volume is gone
         self.client.delete_stack(stack_identifier)
         self.client.wait_for_stack_status(stack_identifier, 'DELETE_COMPLETE')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.volumes_client.get_volume,
                           volume_id)
 
diff --git a/tempest/api/telemetry/base.py b/tempest/api/telemetry/base.py
index 8885187..dc7a8f5 100644
--- a/tempest/api/telemetry/base.py
+++ b/tempest/api/telemetry/base.py
@@ -12,6 +12,8 @@
 
 import time
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common.utils import data_utils
 from tempest import config
 from tempest import exceptions
@@ -80,7 +82,7 @@
         for resource_id in list_of_ids:
             try:
                 method(resource_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
 
     @classmethod
diff --git a/tempest/api/telemetry/test_telemetry_alarming_api.py b/tempest/api/telemetry/test_telemetry_alarming_api.py
index 97eb4eb..05aed08 100644
--- a/tempest/api/telemetry/test_telemetry_alarming_api.py
+++ b/tempest/api/telemetry/test_telemetry_alarming_api.py
@@ -10,14 +10,14 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.telemetry import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest import test
 
 
 class TelemetryAlarmingAPITestJSON(base.BaseTelemetryTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -70,7 +70,7 @@
         self.assertDictContainsSubset(new_rule, body['threshold_rule'])
         # Delete alarm and verify if deleted
         self.telemetry_client.delete_alarm(alarm_id)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.telemetry_client.get_alarm, alarm_id)
 
     @test.attr(type="gate")
@@ -101,5 +101,5 @@
         self.assertDictContainsSubset(rule, body['combination_rule'])
         # Verify alarm delete
         self.telemetry_client.delete_alarm(alarm_id)
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.telemetry_client.get_alarm, alarm_id)
diff --git a/tempest/api/telemetry/test_telemetry_notification_api.py b/tempest/api/telemetry/test_telemetry_notification_api.py
index 7e5d6ee..147020e 100644
--- a/tempest/api/telemetry/test_telemetry_notification_api.py
+++ b/tempest/api/telemetry/test_telemetry_notification_api.py
@@ -21,7 +21,6 @@
 
 
 class TelemetryNotificationAPITestJSON(base.BaseTelemetryTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/admin/test_multi_backend.py b/tempest/api/volume/admin/test_multi_backend.py
index 65c4bd3..245161a 100644
--- a/tempest/api/volume/admin/test_multi_backend.py
+++ b/tempest/api/volume/admin/test_multi_backend.py
@@ -22,7 +22,6 @@
 
 
 class VolumeMultiBackendV2Test(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/admin/test_snapshots_actions.py b/tempest/api/volume/admin/test_snapshots_actions.py
index 6c64298..e7d9d7b 100644
--- a/tempest/api/volume/admin/test_snapshots_actions.py
+++ b/tempest/api/volume/admin/test_snapshots_actions.py
@@ -19,7 +19,6 @@
 
 
 class SnapshotsActionsV2Test(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/admin/test_volume_hosts.py b/tempest/api/volume/admin/test_volume_hosts.py
index a214edf..8189aab 100644
--- a/tempest/api/volume/admin/test_volume_hosts.py
+++ b/tempest/api/volume/admin/test_volume_hosts.py
@@ -18,7 +18,6 @@
 
 
 class VolumeHostsAdminV2TestsJSON(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     @test.attr(type='gate')
     def test_list_hosts(self):
diff --git a/tempest/api/volume/admin/test_volume_quotas.py b/tempest/api/volume/admin/test_volume_quotas.py
index 52f2d90..2a30b54 100644
--- a/tempest/api/volume/admin/test_volume_quotas.py
+++ b/tempest/api/volume/admin/test_volume_quotas.py
@@ -23,7 +23,6 @@
 
 
 class BaseVolumeQuotasAdminV2TestJSON(base.BaseVolumeAdminTest):
-    _interface = "json"
     force_tenant_isolation = True
 
     @classmethod
diff --git a/tempest/api/volume/admin/test_volume_quotas_negative.py b/tempest/api/volume/admin/test_volume_quotas_negative.py
index 5cf6af0..f972457 100644
--- a/tempest/api/volume/admin/test_volume_quotas_negative.py
+++ b/tempest/api/volume/admin/test_volume_quotas_negative.py
@@ -13,13 +13,13 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.volume import base
-from tempest import exceptions
 from tempest import test
 
 
 class BaseVolumeQuotasNegativeV2TestJSON(base.BaseVolumeAdminTest):
-    _interface = "json"
     force_tenant_isolation = True
 
     @classmethod
@@ -42,13 +42,13 @@
 
     @test.attr(type='negative')
     def test_quota_volumes(self):
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.volumes_client.create_volume,
                           size=1)
 
     @test.attr(type='negative')
     def test_quota_volume_snapshots(self):
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.snapshots_client.create_snapshot,
                           self.volume['id'])
 
@@ -65,7 +65,7 @@
         self.quotas_client.update_quota_set(
             self.demo_tenant_id,
             **new_quota_set)
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.volumes_client.create_volume,
                           size=1)
 
@@ -73,7 +73,7 @@
         self.quotas_client.update_quota_set(
             self.demo_tenant_id,
             **self.shared_quota_set)
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(lib_exc.OverLimit,
                           self.snapshots_client.create_snapshot,
                           self.volume['id'])
 
diff --git a/tempest/api/volume/admin/test_volume_services.py b/tempest/api/volume/admin/test_volume_services.py
index 46db70f..3bab185 100644
--- a/tempest/api/volume/admin/test_volume_services.py
+++ b/tempest/api/volume/admin/test_volume_services.py
@@ -22,7 +22,6 @@
     Tests Volume Services API.
     volume service list requires admin privileges.
     """
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 58f1551..f2c1dda 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -22,7 +22,6 @@
 
 
 class VolumeTypesV2Test(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     def _delete_volume(self, volume_id):
         self.volumes_client.delete_volume(volume_id)
diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs.py b/tempest/api/volume/admin/test_volume_types_extra_specs.py
index 460a6c3..1ce1402 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs.py
@@ -19,7 +19,6 @@
 
 
 class VolumeTypesExtraSpecsV2Test(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
index fff0199..2f3b382 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
@@ -15,6 +15,8 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.volume import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -22,7 +24,6 @@
 
 
 class ExtraSpecsNegativeV2Test(base.BaseVolumeAdminTest):
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -83,7 +84,7 @@
             # type id.
         extra_specs = {"spec2": "val1"}
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.volume_types_client.create_volume_type_extra_specs,
             str(uuid.uuid4()), extra_specs)
 
@@ -109,7 +110,7 @@
             # type id.
         extra_specs = {"spec1": "val1"}
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.volume_types_client.delete_volume_type_extra_specs,
             str(uuid.uuid4()), extra_specs.keys()[0])
 
@@ -117,7 +118,7 @@
     def test_list_nonexistent_volume_type_id(self):
         # Should not list volume type extra spec for nonexistent type id.
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.volume_types_client.list_volume_types_extra_specs,
             str(uuid.uuid4()))
 
@@ -126,7 +127,7 @@
         # Should not get volume type extra spec for nonexistent type id.
         extra_specs = {"spec1": "val1"}
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.volume_types_client.get_volume_type_extra_specs,
             str(uuid.uuid4()), extra_specs.keys()[0])
 
@@ -135,7 +136,7 @@
         # Should not get volume type extra spec for nonexistent extra spec
             # id.
         self.assertRaises(
-            exceptions.NotFound,
+            lib_exc.NotFound,
             self.volume_types_client.get_volume_type_extra_specs,
             self.volume_type['id'], str(uuid.uuid4()))
 
diff --git a/tempest/api/volume/admin/test_volume_types_negative.py b/tempest/api/volume/admin/test_volume_types_negative.py
index 4144270..77ca34c 100644
--- a/tempest/api/volume/admin/test_volume_types_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_negative.py
@@ -15,13 +15,14 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.volume import base
 from tempest import exceptions
 from tempest import test
 
 
 class VolumeTypesNegativeV2Test(base.BaseVolumeAdminTest):
-    _interface = 'json'
 
     @test.attr(type='gate')
     def test_create_with_nonexistent_volume_type(self):
@@ -29,7 +30,7 @@
         self.name_field = self.special_fields['name_field']
         params = {self.name_field: str(uuid.uuid4()),
                   'volume_type': str(uuid.uuid4())}
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.volumes_client.create_volume, size=1,
                           **params)
 
@@ -42,14 +43,14 @@
     @test.attr(type='gate')
     def test_get_nonexistent_type_id(self):
         # Should not be able to get volume type with nonexistent type id.
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.volume_types_client.get_volume_type,
                           str(uuid.uuid4()))
 
     @test.attr(type='gate')
     def test_delete_nonexistent_type_id(self):
         # Should not be able to delete volume type with nonexistent type id.
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.volume_types_client.delete_volume_type,
                           str(uuid.uuid4()))
 
diff --git a/tempest/api/volume/admin/test_volumes_actions.py b/tempest/api/volume/admin/test_volumes_actions.py
index 4feba73..439dd35 100644
--- a/tempest/api/volume/admin/test_volumes_actions.py
+++ b/tempest/api/volume/admin/test_volumes_actions.py
@@ -19,7 +19,6 @@
 
 
 class VolumesActionsV2Test(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/admin/test_volumes_backup.py b/tempest/api/volume/admin/test_volumes_backup.py
index 0739480..d572893 100644
--- a/tempest/api/volume/admin/test_volumes_backup.py
+++ b/tempest/api/volume/admin/test_volumes_backup.py
@@ -24,7 +24,6 @@
 
 
 class VolumesBackupsV2Test(base.BaseVolumeAdminTest):
-    _interface = "json"
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/volume/base.py b/tempest/api/volume/base.py
index 127a216..2489b79 100644
--- a/tempest/api/volume/base.py
+++ b/tempest/api/volume/base.py
@@ -13,6 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest import clients
 from tempest.common.utils import data_utils
 from tempest import config
@@ -29,7 +31,6 @@
     """Base test case class for all Cinder API tests."""
 
     _api_version = 2
-    _interface = 'json'
 
     @classmethod
     def resource_setup(cls):
@@ -153,8 +154,7 @@
 
         try:
             cls.adm_creds = cls.isolated_creds.get_admin_creds()
-            cls.os_adm = clients.Manager(
-                credentials=cls.adm_creds, interface=cls._interface)
+            cls.os_adm = clients.Manager(credentials=cls.adm_creds)
         except NotImplementedError:
             msg = "Missing Volume Admin API credentials in configuration."
             raise cls.skipException(msg)
@@ -208,13 +208,13 @@
         for qos_id in cls.qos_specs:
             try:
                 cls.volume_qos_client.delete_qos(qos_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # The qos_specs may have already been deleted which is OK.
                 pass
 
         for qos_id in cls.qos_specs:
             try:
                 cls.volume_qos_client.wait_for_resource_deletion(qos_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # The qos_specs may have already been deleted which is OK.
                 pass
diff --git a/tempest/api/volume/test_volume_transfers.py b/tempest/api/volume/test_volume_transfers.py
index b2961bd..7451050 100644
--- a/tempest/api/volume/test_volume_transfers.py
+++ b/tempest/api/volume/test_volume_transfers.py
@@ -30,13 +30,11 @@
         super(VolumesV2TransfersTest, cls).resource_setup()
 
         # Add another tenant to test volume-transfer
-        cls.os_alt = clients.Manager(cls.isolated_creds.get_alt_creds(),
-                                     interface=cls._interface)
+        cls.os_alt = clients.Manager(cls.isolated_creds.get_alt_creds())
         # Add admin tenant to cleanup resources
         try:
             creds = cls.isolated_creds.get_admin_creds()
-            cls.os_adm = clients.Manager(
-                credentials=creds, interface=cls._interface)
+            cls.os_adm = clients.Manager(credentials=creds)
         except NotImplementedError:
             msg = "Missing Volume Admin API credentials in configuration."
             raise cls.skipException(msg)
diff --git a/tempest/api/volume/test_volumes_get.py b/tempest/api/volume/test_volumes_get.py
index 6d9c438..2a49210 100644
--- a/tempest/api/volume/test_volumes_get.py
+++ b/tempest/api/volume/test_volumes_get.py
@@ -37,15 +37,6 @@
         self.client.delete_volume(volume_id)
         self.client.wait_for_resource_deletion(volume_id)
 
-    def _is_true(self, val):
-        # NOTE(jdg): Temporary conversion method to get cinder patch
-        # merged.  Then we'll make this strict again and
-        # specifically check "true" or "false"
-        if val in ['true', 'True', True]:
-            return True
-        else:
-            return False
-
     def _volume_create_get_update_delete(self, **kwargs):
         # Create a volume, Get it's details and Delete the volume
         volume = {}
@@ -79,13 +70,10 @@
                         'The fetched Volume metadata misses data '
                         'from the created Volume')
 
-        # NOTE(jdg): Revert back to strict true/false checking
-        # after fix for bug #1227837 merges
-        boot_flag = self._is_true(fetched_volume['bootable'])
         if 'imageRef' in kwargs:
-            self.assertEqual(boot_flag, True)
+            self.assertEqual('true', fetched_volume['bootable'])
         if 'imageRef' not in kwargs:
-            self.assertEqual(boot_flag, False)
+            self.assertEqual('false', fetched_volume['bootable'])
 
         # Update Volume
         # Test volume update when display_name is same with original value
@@ -125,13 +113,10 @@
                   self.descrip_field: volume[self.descrip_field]}
         self.client.update_volume(new_volume['id'], **params)
 
-        # NOTE(jdg): Revert back to strict true/false checking
-        # after fix for bug #1227837 merges
-        boot_flag = self._is_true(updated_volume['bootable'])
         if 'imageRef' in kwargs:
-            self.assertEqual(boot_flag, True)
+            self.assertEqual('true', updated_volume['bootable'])
         if 'imageRef' not in kwargs:
-            self.assertEqual(boot_flag, False)
+            self.assertEqual('false', updated_volume['bootable'])
 
     @test.attr(type='smoke')
     def test_volume_create_get_update_delete(self):
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index dc8d8e2..57fcaee 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -15,6 +15,8 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.volume import base
 from tempest.common.utils import data_utils
 from tempest import exceptions
@@ -37,13 +39,13 @@
     @test.attr(type=['negative', 'gate'])
     def test_volume_get_nonexistent_volume_id(self):
         # Should not be able to get a non-existent volume
-        self.assertRaises(exceptions.NotFound, self.client.get_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.get_volume,
                           str(uuid.uuid4()))
 
     @test.attr(type=['negative', 'gate'])
     def test_volume_delete_nonexistent_volume_id(self):
         # Should not be able to delete a non-existent Volume
-        self.assertRaises(exceptions.NotFound, self.client.delete_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_volume,
                           str(uuid.uuid4()))
 
     @test.attr(type=['negative', 'gate'])
@@ -85,7 +87,7 @@
         # Should not be able to create volume with non-existent volume type
         v_name = data_utils.rand_name('Volume-')
         metadata = {'Type': 'work'}
-        self.assertRaises(exceptions.NotFound, self.client.create_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.create_volume,
                           size='1', volume_type=str(uuid.uuid4()),
                           display_name=v_name, metadata=metadata)
 
@@ -94,7 +96,7 @@
         # Should not be able to create volume with non-existent snapshot
         v_name = data_utils.rand_name('Volume-')
         metadata = {'Type': 'work'}
-        self.assertRaises(exceptions.NotFound, self.client.create_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.create_volume,
                           size='1', snapshot_id=str(uuid.uuid4()),
                           display_name=v_name, metadata=metadata)
 
@@ -103,7 +105,7 @@
         # Should not be able to create volume with non-existent source volume
         v_name = data_utils.rand_name('Volume-')
         metadata = {'Type': 'work'}
-        self.assertRaises(exceptions.NotFound, self.client.create_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.create_volume,
                           size='1', source_volid=str(uuid.uuid4()),
                           display_name=v_name, metadata=metadata)
 
@@ -111,7 +113,7 @@
     def test_update_volume_with_nonexistent_volume_id(self):
         v_name = data_utils.rand_name('Volume-')
         metadata = {'Type': 'work'}
-        self.assertRaises(exceptions.NotFound, self.client.update_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.update_volume,
                           volume_id=str(uuid.uuid4()), display_name=v_name,
                           metadata=metadata)
 
@@ -119,7 +121,7 @@
     def test_update_volume_with_invalid_volume_id(self):
         v_name = data_utils.rand_name('Volume-')
         metadata = {'Type': 'work'}
-        self.assertRaises(exceptions.NotFound, self.client.update_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.update_volume,
                           volume_id='#$%%&^&^', display_name=v_name,
                           metadata=metadata)
 
@@ -127,31 +129,31 @@
     def test_update_volume_with_empty_volume_id(self):
         v_name = data_utils.rand_name('Volume-')
         metadata = {'Type': 'work'}
-        self.assertRaises(exceptions.NotFound, self.client.update_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.update_volume,
                           volume_id='', display_name=v_name,
                           metadata=metadata)
 
     @test.attr(type=['negative', 'gate'])
     def test_get_invalid_volume_id(self):
         # Should not be able to get volume with invalid id
-        self.assertRaises(exceptions.NotFound, self.client.get_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.get_volume,
                           '#$%%&^&^')
 
     @test.attr(type=['negative', 'gate'])
     def test_get_volume_without_passing_volume_id(self):
         # Should not be able to get volume when empty ID is passed
-        self.assertRaises(exceptions.NotFound, self.client.get_volume, '')
+        self.assertRaises(lib_exc.NotFound, self.client.get_volume, '')
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_invalid_volume_id(self):
         # Should not be able to delete volume when invalid ID is passed
-        self.assertRaises(exceptions.NotFound, self.client.delete_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.delete_volume,
                           '!@#$%^&*()')
 
     @test.attr(type=['negative', 'gate'])
     def test_delete_volume_without_passing_volume_id(self):
         # Should not be able to delete volume when empty ID is passed
-        self.assertRaises(exceptions.NotFound, self.client.delete_volume, '')
+        self.assertRaises(lib_exc.NotFound, self.client.delete_volume, '')
 
     @test.attr(type=['negative', 'gate'])
     @test.services('compute')
@@ -162,7 +164,7 @@
                                                          self.flavor_ref)
         self.addCleanup(self.servers_client.delete_server, server['id'])
         self.servers_client.wait_for_server_status(server['id'], 'ACTIVE')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.attach_volume,
                           str(uuid.uuid4()),
                           server['id'],
@@ -170,7 +172,7 @@
 
     @test.attr(type=['negative', 'gate'])
     def test_detach_volumes_with_invalid_volume_id(self):
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.detach_volume,
                           'xxx')
 
@@ -199,25 +201,25 @@
     def test_volume_extend_with_nonexistent_volume_id(self):
         # Extend volume size when volume is nonexistent.
         extend_size = int(self.volume['size']) + 1
-        self.assertRaises(exceptions.NotFound, self.client.extend_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.extend_volume,
                           str(uuid.uuid4()), extend_size)
 
     @test.attr(type=['negative', 'gate'])
     def test_volume_extend_without_passing_volume_id(self):
         # Extend volume size when passing volume id is None.
         extend_size = int(self.volume['size']) + 1
-        self.assertRaises(exceptions.NotFound, self.client.extend_volume,
+        self.assertRaises(lib_exc.NotFound, self.client.extend_volume,
                           None, extend_size)
 
     @test.attr(type=['negative', 'gate'])
     def test_reserve_volume_with_nonexistent_volume_id(self):
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.reserve_volume,
                           str(uuid.uuid4()))
 
     @test.attr(type=['negative', 'gate'])
     def test_unreserve_volume_with_nonexistent_volume_id(self):
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.client.unreserve_volume,
                           str(uuid.uuid4()))
 
diff --git a/tempest/api/volume/test_volumes_snapshots_negative.py b/tempest/api/volume/test_volumes_snapshots_negative.py
index 2d7b6de..8b68ea9 100644
--- a/tempest/api/volume/test_volumes_snapshots_negative.py
+++ b/tempest/api/volume/test_volumes_snapshots_negative.py
@@ -12,10 +12,11 @@
 
 import uuid
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api.volume import base
 from tempest.common.utils import data_utils
 from tempest import config
-from tempest import exceptions
 from tempest import test
 
 CONF = config.CONF
@@ -34,7 +35,7 @@
     def test_create_snapshot_with_nonexistent_volume_id(self):
         # Create a snapshot with nonexistent volume id
         s_name = data_utils.rand_name('snap')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.snapshots_client.create_snapshot,
                           str(uuid.uuid4()), display_name=s_name)
 
@@ -42,7 +43,7 @@
     def test_create_snapshot_without_passing_volume_id(self):
         # Create a snapshot without passing volume id
         s_name = data_utils.rand_name('snap')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(lib_exc.NotFound,
                           self.snapshots_client.create_snapshot,
                           None, display_name=s_name)
 
diff --git a/tempest/auth.py b/tempest/auth.py
index 6a92b5f..7e1928f 100644
--- a/tempest/auth.py
+++ b/tempest/auth.py
@@ -38,34 +38,21 @@
     Provide authentication
     """
 
-    def __init__(self, credentials, interface=None):
+    def __init__(self, credentials):
         """
         :param credentials: credentials for authentication
-        :param interface: 'json' or 'xml'. Applicable for tempest client only
-            (deprecated: only json now supported)
         """
-        credentials = self._convert_credentials(credentials)
         if self.check_credentials(credentials):
             self.credentials = credentials
         else:
             raise TypeError("Invalid credentials")
-        self.interface = 'json'
         self.cache = None
         self.alt_auth_data = None
         self.alt_part = None
 
-    def _convert_credentials(self, credentials):
-        # Support dict credentials for backwards compatibility
-        if isinstance(credentials, dict):
-            return get_credentials(**credentials)
-        else:
-            return credentials
-
     def __str__(self):
-        return "Creds :{creds}, interface: {interface}, " \
-               "cached auth data: {cache}".format(
-                   creds=self.credentials, interface=self.interface,
-                   cache=self.cache)
+        return "Creds :{creds}, cached auth data: {cache}".format(
+            creds=self.credentials, cache=self.cache)
 
     @abc.abstractmethod
     def _decorate_request(self, filters, method, url, headers=None, body=None,
@@ -201,8 +188,8 @@
 
     token_expiry_threshold = datetime.timedelta(seconds=60)
 
-    def __init__(self, credentials, interface=None):
-        super(KeystoneAuthProvider, self).__init__(credentials, interface)
+    def __init__(self, credentials):
+        super(KeystoneAuthProvider, self).__init__(credentials)
         self.auth_client = self._auth_client()
 
     def _decorate_request(self, filters, method, url, headers=None, body=None,
@@ -440,44 +427,38 @@
             datetime.datetime.utcnow()
 
 
-def get_default_credentials(credential_type, fill_in=True):
-    """
-    Returns configured credentials of the specified type
-    based on the configured auth_version
-    """
-    return get_credentials(fill_in=fill_in, credential_type=credential_type)
+def is_identity_version_supported(identity_version):
+    return identity_version in IDENTITY_VERSION
 
 
-def get_credentials(credential_type=None, fill_in=True, **kwargs):
+def get_credentials(fill_in=True, identity_version='v2', **kwargs):
     """
     Builds a credentials object based on the configured auth_version
 
-    :param credential_type (string): requests credentials from tempest
-           configuration file. Valid values are defined in
-           Credentials.TYPE.
-    :param kwargs (dict): take into account only if credential_type is
-           not specified or None. Dict of credential key/value pairs
+    :param fill_in (boolean): obtain a token and fill in all credential
+           details provided by the identity service. When fill_in is not
+           specified, credentials are not validated. Validation can be invoked
+           by invoking ``is_valid()``
+    :param identity_version (string): identity API version is used to
+           select the matching auth provider and credentials class
+    :param kwargs (dict): Dict of credential key/value pairs
 
     Examples:
 
         Returns credentials from the provided parameters:
         >>> get_credentials(username='foo', password='bar')
 
-        Returns credentials from tempest configuration:
-        >>> get_credentials(credential_type='user')
+        Returns credentials including IDs:
+        >>> get_credentials(username='foo', password='bar', fill_in=True)
     """
-    if CONF.identity.auth_version == 'v2':
-        credential_class = KeystoneV2Credentials
-        auth_provider_class = KeystoneV2AuthProvider
-    elif CONF.identity.auth_version == 'v3':
-        credential_class = KeystoneV3Credentials
-        auth_provider_class = KeystoneV3AuthProvider
-    else:
-        raise exceptions.InvalidConfiguration('Unsupported auth version')
-    if credential_type is not None:
-        creds = credential_class.get_default(credential_type)
-    else:
-        creds = credential_class(**kwargs)
+    if not is_identity_version_supported(identity_version):
+        raise exceptions.InvalidIdentityVersion(
+            identity_version=identity_version)
+
+    credential_class, auth_provider_class = IDENTITY_VERSION.get(
+        identity_version)
+
+    creds = credential_class(**kwargs)
     # Fill in the credentials fields that were not specified
     if fill_in:
         auth_provider = auth_provider_class(creds)
@@ -490,18 +471,9 @@
     Set of credentials for accessing OpenStack services
 
     ATTRIBUTES: list of valid class attributes representing credentials.
-
-    TYPES: types of credentials available in the configuration file.
-           For each key there's a tuple (section, prefix) to match the
-           configuration options.
     """
 
     ATTRIBUTES = []
-    TYPES = {
-        'identity_admin': ('identity', 'admin'),
-        'user': ('identity', None),
-        'alt_user': ('identity', 'alt')
-    }
 
     def __init__(self, **kwargs):
         """
@@ -554,21 +526,8 @@
         except AttributeError:
             return default
 
-    @classmethod
-    def get_default(cls, credentials_type):
-        if credentials_type not in cls.TYPES:
-            raise exceptions.InvalidCredentials()
-        creds = cls._get_default(credentials_type)
-        if not creds.is_valid():
-            msg = ("The %s credentials are incorrectly set in the config file."
-                   " Double check that all required values are assigned" %
-                   credentials_type)
-            raise exceptions.InvalidConfiguration(msg)
-        return creds
-
-    @classmethod
-    def _get_default(cls, credentials_type):
-        raise NotImplementedError
+    def get_init_attributes(self):
+        return self._initial.keys()
 
     def is_valid(self):
         raise NotImplementedError
@@ -584,21 +543,8 @@
 
 class KeystoneV2Credentials(Credentials):
 
-    CONF_ATTRIBUTES = ['username', 'password', 'tenant_name']
-    ATTRIBUTES = ['user_id', 'tenant_id']
-    ATTRIBUTES.extend(CONF_ATTRIBUTES)
-
-    @classmethod
-    def _get_default(cls, credentials_type='user'):
-        params = {}
-        section, prefix = cls.TYPES[credentials_type]
-        for attr in cls.CONF_ATTRIBUTES:
-            _section = getattr(CONF, section)
-            if prefix is None:
-                params[attr] = getattr(_section, attr)
-            else:
-                params[attr] = getattr(_section, prefix + "_" + attr)
-        return cls(**params)
+    ATTRIBUTES = ['username', 'password', 'tenant_name', 'user_id',
+                  'tenant_id']
 
     def is_valid(self):
         """
@@ -608,16 +554,15 @@
         return None not in (self.username, self.password)
 
 
-class KeystoneV3Credentials(KeystoneV2Credentials):
+class KeystoneV3Credentials(Credentials):
     """
     Credentials suitable for the Keystone Identity V3 API
     """
 
-    CONF_ATTRIBUTES = ['domain_name', 'password', 'tenant_name', 'username']
-    ATTRIBUTES = ['project_domain_id', 'project_domain_name', 'project_id',
+    ATTRIBUTES = ['domain_name', 'password', 'tenant_name', 'username',
+                  'project_domain_id', 'project_domain_name', 'project_id',
                   'project_name', 'tenant_id', 'tenant_name', 'user_domain_id',
                   'user_domain_name', 'user_id']
-    ATTRIBUTES.extend(CONF_ATTRIBUTES)
 
     def __init__(self, **kwargs):
         """
@@ -685,3 +630,7 @@
              self.project_id is not None,
              self.project_name is not None and valid_project_domain])
         return all([self.password is not None, valid_user, valid_project])
+
+
+IDENTITY_VERSION = {'v2': (KeystoneV2Credentials, KeystoneV2AuthProvider),
+                    'v3': (KeystoneV3Credentials, KeystoneV3AuthProvider)}
diff --git a/tempest/cli/simple_read_only/compute/__init__.py b/tempest/cli/simple_read_only/compute/__init__.py
deleted file mode 100644
index e69de29..0000000
--- a/tempest/cli/simple_read_only/compute/__init__.py
+++ /dev/null
diff --git a/tempest/cli/simple_read_only/compute/test_nova.py b/tempest/cli/simple_read_only/compute/test_nova.py
deleted file mode 100644
index aee92fa..0000000
--- a/tempest/cli/simple_read_only/compute/test_nova.py
+++ /dev/null
@@ -1,209 +0,0 @@
-# Copyright 2013 OpenStack Foundation
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from tempest_lib import decorators
-from tempest_lib import exceptions
-import testtools
-
-from tempest import cli
-from tempest import config
-from tempest.openstack.common import log as logging
-
-CONF = config.CONF
-
-LOG = logging.getLogger(__name__)
-
-
-class SimpleReadOnlyNovaClientTest(cli.ClientTestBase):
-
-    """
-    This is a first pass at a simple read only python-novaclient test. This
-    only exercises client commands that are read only.
-
-    This should test commands:
-    * as a regular user
-    * as a admin user
-    * with and without optional parameters
-    * initially just check return codes, and later test command outputs
-
-    """
-
-    @classmethod
-    def resource_setup(cls):
-        if not CONF.service_available.nova:
-            msg = ("%s skipped as Nova is not available" % cls.__name__)
-            raise cls.skipException(msg)
-        super(SimpleReadOnlyNovaClientTest, cls).resource_setup()
-
-    def nova(self, *args, **kwargs):
-        return self.clients.nova(*args,
-                                 endpoint_type=CONF.compute.endpoint_type,
-                                 **kwargs)
-
-    def test_admin_fake_action(self):
-        self.assertRaises(exceptions.CommandFailed,
-                          self.nova,
-                          'this-does-nova-exist')
-
-    # NOTE(jogo): Commands in order listed in 'nova help'
-
-    # Positional arguments:
-
-    def test_admin_absolute_limites(self):
-        self.nova('absolute-limits')
-        self.nova('absolute-limits', params='--reserved')
-
-    def test_admin_aggregate_list(self):
-        self.nova('aggregate-list')
-
-    def test_admin_availability_zone_list(self):
-        self.assertIn("internal", self.nova('availability-zone-list'))
-
-    def test_admin_cloudpipe_list(self):
-        self.nova('cloudpipe-list')
-
-    def test_admin_credentials(self):
-        self.nova('credentials')
-
-    @testtools.skipIf(CONF.service_available.neutron,
-                      "Neutron does not provide this feature")
-    def test_admin_dns_domains(self):
-        self.nova('dns-domains')
-
-    @decorators.skip_because(bug="1157349")
-    def test_admin_dns_list(self):
-        self.nova('dns-list')
-
-    def test_admin_endpoints(self):
-        self.nova('endpoints')
-
-    def test_admin_flavor_acces_list(self):
-        self.assertRaises(exceptions.CommandFailed,
-                          self.nova,
-                          'flavor-access-list')
-        # Failed to get access list for public flavor type
-        self.assertRaises(exceptions.CommandFailed,
-                          self.nova,
-                          'flavor-access-list',
-                          params='--flavor m1.tiny')
-
-    def test_admin_flavor_list(self):
-        self.assertIn("Memory_MB", self.nova('flavor-list'))
-
-    def test_admin_floating_ip_bulk_list(self):
-        self.nova('floating-ip-bulk-list')
-
-    def test_admin_floating_ip_list(self):
-        self.nova('floating-ip-list')
-
-    def test_admin_floating_ip_pool_list(self):
-        self.nova('floating-ip-pool-list')
-
-    def test_admin_host_list(self):
-        self.nova('host-list')
-
-    def test_admin_hypervisor_list(self):
-        self.nova('hypervisor-list')
-
-    def test_admin_image_list(self):
-        self.nova('image-list')
-
-    @decorators.skip_because(bug="1157349")
-    def test_admin_interface_list(self):
-        self.nova('interface-list')
-
-    def test_admin_keypair_list(self):
-        self.nova('keypair-list')
-
-    def test_admin_list(self):
-        self.nova('list')
-        self.nova('list', params='--all-tenants 1')
-        self.nova('list', params='--all-tenants 0')
-        self.assertRaises(exceptions.CommandFailed,
-                          self.nova,
-                          'list',
-                          params='--all-tenants bad')
-
-    def test_admin_network_list(self):
-        self.nova('network-list')
-
-    def test_admin_rate_limits(self):
-        self.nova('rate-limits')
-
-    def test_admin_secgroup_list(self):
-        self.nova('secgroup-list')
-
-    @decorators.skip_because(bug="1157349")
-    def test_admin_secgroup_list_rules(self):
-        self.nova('secgroup-list-rules')
-
-    @cli.min_client_version(client='nova', version='2.18')
-    def test_admin_server_group_list(self):
-        self.nova('server-group-list')
-
-    def test_admin_servce_list(self):
-        self.nova('service-list')
-
-    def test_admin_usage(self):
-        self.nova('usage')
-
-    def test_admin_usage_list(self):
-        self.nova('usage-list')
-
-    @testtools.skipIf(not CONF.service_available.cinder,
-                      "Skipped as Cinder is not available")
-    def test_admin_volume_list(self):
-        self.nova('volume-list')
-
-    @testtools.skipIf(not CONF.service_available.cinder,
-                      "Skipped as Cinder is not available")
-    def test_admin_volume_snapshot_list(self):
-        self.nova('volume-snapshot-list')
-
-    @testtools.skipIf(not CONF.service_available.cinder,
-                      "Skipped as Cinder is not available")
-    def test_admin_volume_type_list(self):
-        self.nova('volume-type-list')
-
-    def test_admin_help(self):
-        self.nova('help')
-
-    def test_admin_list_extensions(self):
-        self.nova('list-extensions')
-
-    def test_admin_net_list(self):
-        self.nova('net-list')
-
-    def test_agent_list(self):
-        self.nova('agent-list')
-        self.nova('agent-list', flags='--debug')
-
-    def test_migration_list(self):
-        self.nova('migration-list')
-        self.nova('migration-list', flags='--debug')
-
-    # Optional arguments:
-
-    def test_admin_version(self):
-        self.nova('', flags='--version')
-
-    def test_admin_debug_list(self):
-        self.nova('list', flags='--debug')
-
-    def test_admin_timeout(self):
-        self.nova('list', flags='--timeout %d' % CONF.cli.timeout)
-
-    def test_admin_timing(self):
-        self.nova('list', flags='--timing')
diff --git a/tempest/clients.py b/tempest/clients.py
index 03928ba..1836173 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -15,7 +15,7 @@
 
 import copy
 
-from tempest import auth
+from tempest.common import cred_provider
 from tempest.common import negative_rest_client
 from tempest import config
 from tempest import manager
@@ -155,10 +155,7 @@
     }
     default_params_with_timeout_values.update(default_params)
 
-    def __init__(self, credentials=None, interface='json', service=None):
-        # Set interface and client type first
-        self.interface = interface
-        # super cares for credentials validation
+    def __init__(self, credentials=None, service=None):
         super(Manager, self).__init__(credentials=credentials)
 
         self._set_compute_clients()
@@ -376,8 +373,8 @@
     managed client objects
     """
 
-    def __init__(self, interface='json', service=None):
+    def __init__(self, service=None):
         super(AdminManager, self).__init__(
-            credentials=auth.get_default_credentials('identity_admin'),
-            interface=interface,
+            credentials=cred_provider.get_configured_credentials(
+                'identity_admin'),
             service=service)
diff --git a/tempest/cmd/cleanup.py b/tempest/cmd/cleanup.py
index 28992b9..c52704a 100755
--- a/tempest/cmd/cleanup.py
+++ b/tempest/cmd/cleanup.py
@@ -54,9 +54,9 @@
 import json
 import sys
 
-from tempest import auth
 from tempest import clients
 from tempest.cmd import cleanup_service
+from tempest.common import cred_provider
 from tempest import config
 from tempest.openstack.common import log as logging
 
@@ -159,7 +159,8 @@
         kwargs = {"username": CONF.identity.admin_username,
                   "password": CONF.identity.admin_password,
                   "tenant_name": tenant['name']}
-        mgr = clients.Manager(credentials=auth.get_credentials(**kwargs))
+        mgr = clients.Manager(credentials=cred_provider.get_credentials(
+            **kwargs))
         kwargs = {'data': tenant_data,
                   'is_dry_run': is_dry_run,
                   'saved_state_json': None,
diff --git a/tempest/cmd/javelin.py b/tempest/cmd/javelin.py
index 889b2dd..4af2108 100755
--- a/tempest/cmd/javelin.py
+++ b/tempest/cmd/javelin.py
@@ -110,6 +110,7 @@
 import unittest
 
 import netaddr
+from tempest_lib import exceptions as lib_exc
 import yaml
 
 import tempest.auth
@@ -297,7 +298,7 @@
             USERS[user]['tenant_id'],
             USERS[user]['id'],
             role['id'])
-    except exceptions.Conflict:
+    except lib_exc.Conflict:
         # don't care if it's already assigned
         pass
 
@@ -313,14 +314,14 @@
     for u in users:
         try:
             tenant = admin.identity.get_tenant_by_name(u['tenant'])
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             LOG.error("Tenant: %s - not found" % u['tenant'])
             continue
         try:
             admin.identity.get_user_by_username(tenant['id'], u['name'])
             LOG.warn("User '%s' already exists in this environment"
                      % u['name'])
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             admin.identity.create_user(
                 u['name'], u['pass'], tenant['id'],
                 "%s@%s" % (u['name'], tenant['id']),
diff --git a/tempest/cmd/verify_tempest_config.py b/tempest/cmd/verify_tempest_config.py
index 65a3a95..87f5ca6 100755
--- a/tempest/cmd/verify_tempest_config.py
+++ b/tempest/cmd/verify_tempest_config.py
@@ -327,7 +327,7 @@
         CONF_PARSER = moves.configparser.SafeConfigParser()
         CONF_PARSER.optionxform = str
         CONF_PARSER.readfp(conf_file)
-    os = clients.AdminManager(interface='json')
+    os = clients.AdminManager()
     services = check_service_availability(os, update)
     results = {}
     for service in ['nova', 'cinder', 'neutron', 'swift']:
diff --git a/tempest/common/accounts.py b/tempest/common/accounts.py
index 66285e4..dd8d498 100644
--- a/tempest/common/accounts.py
+++ b/tempest/common/accounts.py
@@ -17,7 +17,6 @@
 
 import yaml
 
-from tempest import auth
 from tempest.common import cred_provider
 from tempest import config
 from tempest import exceptions
@@ -109,9 +108,9 @@
 
     def get_hash(self, creds):
         for _hash in self.hash_dict:
-            # Comparing on the attributes that are expected in the YAML
+            # Comparing on the attributes that were read from the YAML
             if all([getattr(creds, k) == self.hash_dict[_hash][k] for k in
-                    creds.CONF_ATTRIBUTES]):
+                    creds.get_init_attributes()]):
                 return _hash
         raise AttributeError('Invalid credentials %s' % creds)
 
@@ -123,7 +122,7 @@
         if self.isolated_creds.get('primary'):
             return self.isolated_creds.get('primary')
         creds = self._get_creds()
-        primary_credential = auth.get_credentials(**creds)
+        primary_credential = cred_provider.get_credentials(**creds)
         self.isolated_creds['primary'] = primary_credential
         return primary_credential
 
@@ -131,7 +130,7 @@
         if self.isolated_creds.get('alt'):
             return self.isolated_creds.get('alt')
         creds = self._get_creds()
-        alt_credential = auth.get_credentials(**creds)
+        alt_credential = cred_provider.get_credentials(**creds)
         self.isolated_creds['alt'] = alt_credential
         return alt_credential
 
@@ -189,9 +188,10 @@
             return self.isolated_creds.get('primary')
         if not self.use_default_creds:
             creds = self.get_creds(0)
-            primary_credential = auth.get_credentials(**creds)
+            primary_credential = cred_provider.get_credentials(**creds)
         else:
-            primary_credential = auth.get_default_credentials('user')
+            primary_credential = cred_provider.get_configured_credentials(
+                'user')
         self.isolated_creds['primary'] = primary_credential
         return primary_credential
 
@@ -200,9 +200,10 @@
             return self.isolated_creds.get('alt')
         if not self.use_default_creds:
             creds = self.get_creds(1)
-            alt_credential = auth.get_credentials(**creds)
+            alt_credential = cred_provider.get_credentials(**creds)
         else:
-            alt_credential = auth.get_default_credentials('alt_user')
+            alt_credential = cred_provider.get_configured_credentials(
+                'alt_user')
         self.isolated_creds['alt'] = alt_credential
         return alt_credential
 
@@ -210,4 +211,5 @@
         self.isolated_creds = {}
 
     def get_admin_creds(self):
-        return auth.get_default_credentials("identity_admin", fill_in=False)
+        return cred_provider.get_configured_credentials(
+            "identity_admin", fill_in=False)
diff --git a/tempest/common/cred_provider.py b/tempest/common/cred_provider.py
index c5be0c0..f40ed7a 100644
--- a/tempest/common/cred_provider.py
+++ b/tempest/common/cred_provider.py
@@ -16,17 +16,68 @@
 
 import six
 
+from tempest import auth
 from tempest import config
+from tempest import exceptions
 from tempest.openstack.common import log as logging
 
 CONF = config.CONF
 LOG = logging.getLogger(__name__)
 
+# Type of credentials available from configuration
+CREDENTIAL_TYPES = {
+    'identity_admin': ('identity', 'admin'),
+    'user': ('identity', None),
+    'alt_user': ('identity', 'alt')
+}
+
+
+# Read credentials from configuration, builds a Credentials object
+# based on the specified or configured version
+def get_configured_credentials(credential_type, fill_in=True,
+                               identity_version=None):
+    identity_version = identity_version or CONF.identity.auth_version
+    if identity_version not in ('v2', 'v3'):
+        raise exceptions.InvalidConfiguration(
+            'Unsupported auth version: %s' % identity_version)
+    if credential_type not in CREDENTIAL_TYPES:
+        raise exceptions.InvalidCredentials()
+    conf_attributes = ['username', 'password', 'tenant_name']
+    if identity_version == 'v3':
+        conf_attributes.append('domain_name')
+    # Read the parts of credentials from config
+    params = {}
+    section, prefix = CREDENTIAL_TYPES[credential_type]
+    for attr in conf_attributes:
+        _section = getattr(CONF, section)
+        if prefix is None:
+            params[attr] = getattr(_section, attr)
+        else:
+            params[attr] = getattr(_section, prefix + "_" + attr)
+    # Build and validate credentials. We are reading configured credentials,
+    # so validate them even if fill_in is False
+    credentials = get_credentials(fill_in=fill_in, **params)
+    if not fill_in:
+        if not credentials.is_valid():
+            msg = ("The %s credentials are incorrectly set in the config file."
+                   " Double check that all required values are assigned" %
+                   credential_type)
+            raise exceptions.InvalidConfiguration(msg)
+    return credentials
+
+
+# Wrapper around auth.get_credentials to use the configured identity version
+# is none is specified
+def get_credentials(fill_in=True, identity_version=None, **kwargs):
+    identity_version = identity_version or CONF.identity.auth_version
+    return auth.get_credentials(fill_in=fill_in,
+                                identity_version=identity_version,
+                                **kwargs)
+
 
 @six.add_metaclass(abc.ABCMeta)
 class CredentialProvider(object):
-    def __init__(self, name, interface='json', password='pass',
-                 network_resources=None):
+    def __init__(self, name, password='pass', network_resources=None):
         self.name = name
 
     @abc.abstractmethod
diff --git a/tempest/common/isolated_creds.py b/tempest/common/isolated_creds.py
index a663931..1cfb963 100644
--- a/tempest/common/isolated_creds.py
+++ b/tempest/common/isolated_creds.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 import netaddr
+from tempest_lib import exceptions as lib_exc
 
-from tempest import auth
 from tempest import clients
 from tempest.common import cred_provider
 from tempest.common.utils import data_utils
@@ -28,15 +28,12 @@
 
 class IsolatedCreds(cred_provider.CredentialProvider):
 
-    def __init__(self, name, interface='json', password='pass',
-                 network_resources=None):
-        super(IsolatedCreds, self).__init__(name, interface, password,
-                                            network_resources)
+    def __init__(self, name, password='pass', network_resources=None):
+        super(IsolatedCreds, self).__init__(name, password, network_resources)
         self.network_resources = network_resources
         self.isolated_creds = {}
         self.isolated_net_resources = {}
         self.ports = []
-        self.interface = interface
         self.password = password
         self.identity_admin_client, self.network_admin_client = (
             self._get_admin_clients())
@@ -48,7 +45,7 @@
             identity
             network
         """
-        os = clients.AdminManager(interface=self.interface)
+        os = clients.AdminManager()
         return os.identity_client, os.network_client
 
     def _create_tenant(self, name, description):
@@ -81,7 +78,7 @@
             role = next(r for r in roles if r['name'] == role_name)
         except StopIteration:
             msg = 'No "%s" role found' % role_name
-            raise exceptions.NotFound(msg)
+            raise lib_exc.NotFound(msg)
         self.identity_admin_client.assign_user_role(tenant['id'], user['id'],
                                                     role['id'])
 
@@ -129,7 +126,7 @@
         return self._get_credentials(user, tenant)
 
     def _get_credentials(self, user, tenant):
-        return auth.get_credentials(
+        return cred_provider.get_credentials(
             username=user['name'], user_id=user['id'],
             tenant_name=tenant['name'], tenant_id=tenant['id'],
             password=self.password)
@@ -282,7 +279,7 @@
         net_client = self.network_admin_client
         try:
             net_client.delete_router(router_id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             LOG.warn('router with name: %s not found for delete' %
                      router_name)
 
@@ -290,7 +287,7 @@
         net_client = self.network_admin_client
         try:
             net_client.delete_subnet(subnet_id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             LOG.warn('subnet with name: %s not found for delete' %
                      subnet_name)
 
@@ -298,7 +295,7 @@
         net_client = self.network_admin_client
         try:
             net_client.delete_network(network_id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             LOG.warn('network with name: %s not found for delete' %
                      network_name)
 
@@ -310,7 +307,7 @@
         for secgroup in secgroups_to_delete:
             try:
                 net_client.delete_security_group(secgroup['id'])
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 LOG.warn('Security group %s, id %s not found for clean-up' %
                          (secgroup['name'], secgroup['id']))
 
@@ -326,7 +323,7 @@
                 try:
                     net_client.remove_router_interface_with_subnet_id(
                         router['id'], subnet['id'])
-                except exceptions.NotFound:
+                except lib_exc.NotFound:
                     LOG.warn('router with name: %s not found for delete' %
                              router['name'])
                 self._clear_isolated_router(router['id'], router['name'])
@@ -344,12 +341,12 @@
         for creds in self.isolated_creds.itervalues():
             try:
                 self._delete_user(creds.user_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 LOG.warn("user with name: %s not found for delete" %
                          creds.username)
             try:
                 self._delete_tenant(creds.tenant_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 LOG.warn("tenant with name: %s not found for delete" %
                          creds.tenant_name)
 
diff --git a/tempest/common/service_client.py b/tempest/common/service_client.py
index 69e25e2..9aeb243 100644
--- a/tempest/common/service_client.py
+++ b/tempest/common/service_client.py
@@ -59,22 +59,14 @@
                 method, url,
                 extra_headers=extra_headers,
                 headers=headers, body=body)
-        except lib_exceptions.Unauthorized as ex:
-            raise exceptions.Unauthorized(ex)
-        except lib_exceptions.NotFound as ex:
-            raise exceptions.NotFound(ex)
         except lib_exceptions.BadRequest as ex:
             raise exceptions.BadRequest(ex)
-        except lib_exceptions.Conflict as ex:
-            raise exceptions.Conflict(ex)
-        except lib_exceptions.OverLimit as ex:
-            raise exceptions.OverLimit(ex)
         # TODO(oomichi): This is just a workaround for failing gate tests
         # when separating Forbidden from Unauthorized in tempest-lib.
         # We will need to remove this translation and replace negative tests
         # with lib_exceptions.Forbidden in the future.
         except lib_exceptions.Forbidden as ex:
-            raise exceptions.Unauthorized(ex)
+            raise lib_exceptions.Unauthorized(ex)
 
 
 class ResponseBody(dict):
diff --git a/tempest/config.py b/tempest/config.py
index c60434a..4588b20 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -455,7 +455,13 @@
     cfg.ListOpt('dns_servers',
                 default=["8.8.8.8", "8.8.4.4"],
                 help="List of dns servers which should be used"
-                     " for subnet creation")
+                     " for subnet creation"),
+    cfg.StrOpt('port_vnic_type',
+               choices=[None, 'normal', 'direct', 'macvtap'],
+               help="vnic_type to use when Launching instances"
+                    " with pre-configured ports."
+                    " Supported ports are:"
+                    " ['normal','direct','macvtap']"),
 ]
 
 network_feature_group = cfg.OptGroup(name='network-feature-enabled',
diff --git a/tempest/exceptions.py b/tempest/exceptions.py
index 7ddeeff..09f7016 100644
--- a/tempest/exceptions.py
+++ b/tempest/exceptions.py
@@ -63,6 +63,10 @@
     message = "Invalid service tag"
 
 
+class InvalidIdentityVersion(TempestException):
+    message = "Invalid version %(identity_version) of the identity service"
+
+
 class TimeoutException(TempestException):
     message = "Request timed out"
 
@@ -151,26 +155,10 @@
     message = "The success code is different than the expected one"
 
 
-class NotFound(RestClientException):
-    message = "Object not found"
-
-
-class Unauthorized(RestClientException):
-    message = 'Unauthorized'
-
-
 class BadRequest(RestClientException):
     message = "Bad request"
 
 
-class OverLimit(RestClientException):
-    message = "Quota exceeded"
-
-
-class Conflict(RestClientException):
-    message = "An object with that identifier already exists"
-
-
 class ResponseWithNonEmptyBody(RFCViolation):
     message = ("RFC Violation! Response with %(status)d HTTP Status Code "
                "MUST NOT have a body")
diff --git a/tempest/manager.py b/tempest/manager.py
index 538b619..421d2de 100644
--- a/tempest/manager.py
+++ b/tempest/manager.py
@@ -14,6 +14,7 @@
 #    under the License.
 
 from tempest import auth
+from tempest.common import cred_provider
 from tempest import config
 from tempest import exceptions
 
@@ -39,7 +40,7 @@
         """
         self.auth_version = CONF.identity.auth_version
         if credentials is None:
-            self.credentials = auth.get_default_credentials('user')
+            self.credentials = cred_provider.get_configured_credentials('user')
         else:
             self.credentials = credentials
         # Check if passed or default credentials are valid
@@ -63,5 +64,4 @@
                 'Credentials must be specified')
         auth_provider_class = self.get_auth_provider_class(credentials)
         return auth_provider_class(
-            interface=getattr(self, 'interface', None),
             credentials=credentials)
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index 8e9f3ea..7da7b12 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -19,9 +19,10 @@
 
 import netaddr
 import six
+from tempest_lib import exceptions as lib_exc
 
-from tempest import auth
 from tempest import clients
+from tempest.common import cred_provider
 from tempest.common import credentials
 from tempest.common.utils import data_utils
 from tempest.common.utils.linux import remote_client
@@ -110,7 +111,7 @@
             # Tempest clients return dicts, so there is no common delete
             # method available. Using a callable instead
             delete_thing(*args, **kwargs)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             # If the resource is already missing, mission accomplished.
             pass
 
@@ -628,7 +629,7 @@
             try:
                 result = client.create_subnet(**subnet)
                 break
-            except exceptions.Conflict as e:
+            except lib_exc.Conflict as e:
                 is_overlapping_cidr = 'overlaps with another subnet' in str(e)
                 if not is_overlapping_cidr:
                     raise
@@ -639,14 +640,15 @@
         self.addCleanup(self.delete_wrapper, subnet.delete)
         return subnet
 
-    def _create_port(self, network, client=None, namestart='port-quotatest'):
+    def _create_port(self, network_id, client=None, namestart='port-quotatest',
+                     **kwargs):
         if not client:
             client = self.network_client
         name = data_utils.rand_name(namestart)
         result = client.create_port(
             name=name,
-            network_id=network.id,
-            tenant_id=network.tenant_id)
+            network_id=network_id,
+            **kwargs)
         self.assertIsNotNone(result, 'Unable to allocate port')
         port = net_resources.DeletablePort(client=client,
                                            **result['port'])
@@ -915,7 +917,7 @@
                 try:
                     sg_rule = self._create_security_group_rule(
                         client=client, secgroup=secgroup, **ruleset)
-                except exceptions.Conflict as ex:
+                except lib_exc.Conflict as ex:
                     # if rule already exist - skip rule and continue
                     msg = 'Security group rule already exists'
                     if msg not in ex._error_string:
@@ -1047,6 +1049,66 @@
             subnet.add_to_router(router.id)
         return network, subnet, router
 
+    def create_server(self, name=None, image=None, flavor=None,
+                      wait_on_boot=True, wait_on_delete=True,
+                      create_kwargs=None):
+        vnic_type = CONF.network.port_vnic_type
+
+        # If vnic_type is configured create port for
+        # every network
+        if vnic_type:
+            ports = []
+            networks = []
+            create_port_body = {'binding:vnic_type': vnic_type,
+                                'namestart': 'port-smoke'}
+            if create_kwargs:
+                net_client = create_kwargs.get("network_client",
+                                               self.network_client)
+
+                # Convert security group names to security group ids
+                # to pass to create_port
+                if create_kwargs.get('security_groups'):
+                    security_groups = net_client.list_security_groups().get(
+                        'security_groups')
+                    sec_dict = dict([(s['name'], s['id'])
+                                    for s in security_groups])
+
+                    sec_groups_names = [s['name'] for s in create_kwargs[
+                        'security_groups']]
+                    security_groups_ids = [sec_dict[s]
+                                           for s in sec_groups_names]
+
+                    if security_groups_ids:
+                        create_port_body[
+                            'security_groups'] = security_groups_ids
+                networks = create_kwargs.get('networks')
+            else:
+                net_client = self.network_client
+            # If there are no networks passed to us we look up
+            # for the tenant's private networks and create a port
+            # if there is only one private network. The same behaviour
+            # as we would expect when passing the call to the clients
+            # with no networks
+            if not networks:
+                networks = net_client.list_networks(filters={
+                    'router:external': False})
+                self.assertEqual(1, len(networks),
+                                 "There is more than one"
+                                 " network for the tenant")
+            for net in networks:
+                net_id = net['uuid']
+                port = self._create_port(network_id=net_id,
+                                         client=net_client,
+                                         **create_port_body)
+                ports.append({'port': port.id})
+            if ports:
+                create_kwargs['networks'] = ports
+
+        return super(NetworkScenarioTest, self).create_server(
+            name=name, image=image, flavor=flavor,
+            wait_on_boot=wait_on_boot, wait_on_delete=wait_on_delete,
+            create_kwargs=create_kwargs)
+
 
 # power/provision states as of icehouse
 class BaremetalPowerStates(object):
@@ -1124,7 +1186,7 @@
             node = None
             try:
                 node = self.get_node(instance_id=instance_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
             return node is not None
 
@@ -1259,8 +1321,9 @@
 
     @classmethod
     def credentials(cls):
-        admin_creds = auth.get_default_credentials('identity_admin')
-        creds = auth.get_default_credentials('user')
+        admin_creds = cred_provider.get_configured_credentials(
+            'identity_admin')
+        creds = cred_provider.get_configured_credentials('user')
         admin_creds.tenant_name = creds.tenant_name
         return admin_creds
 
diff --git a/tempest/scenario/test_large_ops.py b/tempest/scenario/test_large_ops.py
index 99a2023..ac766ea 100644
--- a/tempest/scenario/test_large_ops.py
+++ b/tempest/scenario/test_large_ops.py
@@ -12,7 +12,7 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-from tempest_lib import exceptions
+from tempest_lib import exceptions as lib_exc
 
 from tempest.common.utils import data_utils
 from tempest import config
@@ -54,7 +54,7 @@
             function, args, kwargs = cls._cleanup_resources.pop(-1)
             try:
                 function(*args, **kwargs)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
         super(TestLargeOpsScenario, cls).resource_cleanup()
 
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index fc174cd..ae326c4 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -381,6 +381,9 @@
 
     @testtools.skipUnless(CONF.compute_feature_enabled.interface_attach,
                           'NIC hotplug not available')
+    @testtools.skipIf(CONF.network.port_vnic_type in ['direct', 'macvtap'],
+                      'NIC hotplug not supported for '
+                      'vnic_type direct or macvtap')
     @test.attr(type='smoke')
     @test.services('compute', 'network')
     def test_hotplug_nic(self):
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 83739fd..55ab18f 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -238,7 +238,8 @@
             ],
             'key_name': tenant.keypair['name'],
             'security_groups': security_groups_names,
-            'tenant_id': tenant.creds.tenant_id
+            'tenant_id': tenant.creds.tenant_id,
+            'network_client': tenant.manager.network_client
         }
         server = self.create_server(name=name, create_kwargs=create_kwargs)
         self.assertEqual(
diff --git a/tempest/scenario/test_stamp_pattern.py b/tempest/scenario/test_stamp_pattern.py
index 9efd55b..e97f089 100644
--- a/tempest/scenario/test_stamp_pattern.py
+++ b/tempest/scenario/test_stamp_pattern.py
@@ -16,6 +16,7 @@
 import time
 
 from tempest_lib import decorators
+from tempest_lib import exceptions as lib_exc
 import testtools
 
 from tempest.common.utils import data_utils
@@ -85,7 +86,7 @@
             try:
                 while self.snapshots_client.get_snapshot(snapshot['id']):
                     time.sleep(1)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 pass
         self.addCleanup(cleaner)
         self._wait_for_volume_status(volume, 'available')
diff --git a/tempest/scenario/utils.py b/tempest/scenario/utils.py
index f997a65..061f5c8 100644
--- a/tempest/scenario/utils.py
+++ b/tempest/scenario/utils.py
@@ -21,8 +21,8 @@
 import testscenarios
 import testtools
 
-from tempest import auth
 from tempest import clients
+from tempest.common import cred_provider
 from tempest.common.utils import misc
 from tempest import config
 from tempest import exceptions
@@ -101,7 +101,7 @@
 
     def __init__(self):
         os = clients.Manager(
-            auth.get_default_credentials('user', fill_in=False))
+            cred_provider.get_configured_credentials('user', fill_in=False))
         self.images_client = os.images_client
         self.flavors_client = os.flavors_client
         self.image_pattern = CONF.input_scenario.image_regex
diff --git a/tempest/services/botoclients.py b/tempest/services/botoclients.py
index f581e89..50d0779 100644
--- a/tempest/services/botoclients.py
+++ b/tempest/services/botoclients.py
@@ -15,6 +15,7 @@
 
 import ConfigParser
 import contextlib
+from tempest_lib import exceptions as lib_exc
 import types
 import urlparse
 
@@ -65,7 +66,7 @@
             ec2_cred = keystone.ec2.create(keystone.auth_user_id,
                                            keystone.auth_tenant_id)
         if not all((ec2_cred, ec2_cred.access, ec2_cred.secret)):
-            raise exceptions.NotFound("Unable to get access and secret keys")
+            raise lib_exc.NotFound("Unable to get access and secret keys")
         return ec2_cred
 
     def _config_boto_timeout(self, timeout, retries):
diff --git a/tempest/services/compute/json/aggregates_client.py b/tempest/services/compute/json/aggregates_client.py
index 94ea713..10955fd 100644
--- a/tempest/services/compute/json/aggregates_client.py
+++ b/tempest/services/compute/json/aggregates_client.py
@@ -15,10 +15,11 @@
 
 import json
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api_schema.response.compute import aggregates as schema
 from tempest.api_schema.response.compute.v2 import aggregates as v2_schema
 from tempest.common import service_client
-from tempest import exceptions
 
 
 class AggregatesClientJSON(service_client.ServiceClient):
@@ -68,7 +69,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_aggregate(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/compute/json/floating_ips_client.py b/tempest/services/compute/json/floating_ips_client.py
index 9c586e3..d06386e 100644
--- a/tempest/services/compute/json/floating_ips_client.py
+++ b/tempest/services/compute/json/floating_ips_client.py
@@ -16,9 +16,10 @@
 import json
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api_schema.response.compute.v2 import floating_ips as schema
 from tempest.common import service_client
-from tempest import exceptions
 
 
 class FloatingIPsClientJSON(service_client.ServiceClient):
@@ -40,7 +41,7 @@
         resp, body = self.get(url)
         body = json.loads(body)
         if resp.status == 404:
-            raise exceptions.NotFound(body)
+            raise lib_exc.NotFound(body)
         self.validate_response(schema.floating_ip, resp, body)
         return resp, body['floating_ip']
 
@@ -92,7 +93,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_floating_ip_details(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/compute/json/images_client.py b/tempest/services/compute/json/images_client.py
index a5755da..0ceb6d1 100644
--- a/tempest/services/compute/json/images_client.py
+++ b/tempest/services/compute/json/images_client.py
@@ -16,10 +16,11 @@
 import json
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api_schema.response.compute.v2 import images as schema
 from tempest.common import service_client
 from tempest.common import waiters
-from tempest import exceptions
 
 
 class ImagesClientJSON(service_client.ServiceClient):
@@ -131,7 +132,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_image(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/compute/json/security_groups_client.py b/tempest/services/compute/json/security_groups_client.py
index 410ad60..5aefa7b 100644
--- a/tempest/services/compute/json/security_groups_client.py
+++ b/tempest/services/compute/json/security_groups_client.py
@@ -16,9 +16,10 @@
 import json
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api_schema.response.compute.v2 import security_groups as schema
 from tempest.common import service_client
-from tempest import exceptions
 
 
 class SecurityGroupsClientJSON(service_client.ServiceClient):
@@ -128,12 +129,12 @@
         for sg in body['security_groups']:
             if sg['id'] == security_group_id:
                 return service_client.ResponseBodyList(resp, sg['rules'])
-        raise exceptions.NotFound('No such Security Group')
+        raise lib_exc.NotFound('No such Security Group')
 
     def is_resource_deleted(self, id):
         try:
             self.get_security_group(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/compute/json/servers_client.py b/tempest/services/compute/json/servers_client.py
index be23b78..fe3d02b 100644
--- a/tempest/services/compute/json/servers_client.py
+++ b/tempest/services/compute/json/servers_client.py
@@ -18,6 +18,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api_schema.response.compute import servers as common_schema
 from tempest.api_schema.response.compute.v2 import servers as schema
 from tempest.common import service_client
@@ -183,7 +185,7 @@
         while True:
             try:
                 resp, body = self.get_server(server_id)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 return
 
             server_status = body['status']
diff --git a/tempest/services/compute/json/volumes_extensions_client.py b/tempest/services/compute/json/volumes_extensions_client.py
index 2e3e49c..a9cada8 100644
--- a/tempest/services/compute/json/volumes_extensions_client.py
+++ b/tempest/services/compute/json/volumes_extensions_client.py
@@ -17,6 +17,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.api_schema.response.compute.v2 import volumes as schema
 from tempest.common import service_client
 from tempest import exceptions
@@ -102,7 +104,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_volume(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/database/json/limits_client.py b/tempest/services/database/json/limits_client.py
index 4daf028..6168bfd 100644
--- a/tempest/services/database/json/limits_client.py
+++ b/tempest/services/database/json/limits_client.py
@@ -15,11 +15,8 @@
 
 import urllib
 
-from tempest import config
 from tempest_lib.common import rest_client
 
-CONF = config.CONF
-
 
 class DatabaseLimitsClientJSON(rest_client.RestClient):
 
diff --git a/tempest/services/identity/json/identity_client.py b/tempest/services/identity/json/identity_client.py
index d4f57e0..6fbb3a9 100644
--- a/tempest/services/identity/json/identity_client.py
+++ b/tempest/services/identity/json/identity_client.py
@@ -11,10 +11,10 @@
 #    under the License.
 
 import json
+from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
 from tempest import config
-from tempest import exceptions
 
 CONF = config.CONF
 
@@ -134,7 +134,7 @@
         for tenant in tenants:
             if tenant['name'] == tenant_name:
                 return tenant
-        raise exceptions.NotFound('No such tenant')
+        raise lib_exc.NotFound('No such tenant')
 
     def update_tenant(self, tenant_id, **kwargs):
         """Updates a tenant."""
@@ -227,7 +227,7 @@
         for user in users:
             if user['name'] == username:
                 return user
-        raise exceptions.NotFound('No such user')
+        raise lib_exc.NotFound('No such user')
 
     def create_service(self, name, type, **kwargs):
         """Create a service."""
diff --git a/tempest/services/identity/json/token_client.py b/tempest/services/identity/json/token_client.py
index 93936bc..1e8b31e 100644
--- a/tempest/services/identity/json/token_client.py
+++ b/tempest/services/identity/json/token_client.py
@@ -13,6 +13,7 @@
 #    under the License.
 
 import json
+from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
 from tempest import config
@@ -87,7 +88,7 @@
 
         if resp.status in [401, 403]:
             resp_body = json.loads(resp_body)
-            raise exceptions.Unauthorized(resp_body['error']['message'])
+            raise lib_exc.Unauthorized(resp_body['error']['message'])
         elif resp.status not in [200, 201]:
             raise exceptions.IdentityError(
                 'Unexpected status code {0}'.format(resp.status))
diff --git a/tempest/services/identity/v3/json/identity_client.py b/tempest/services/identity/v3/json/identity_client.py
index f3d9d2d..95c52bf 100644
--- a/tempest/services/identity/v3/json/identity_client.py
+++ b/tempest/services/identity/v3/json/identity_client.py
@@ -17,11 +17,8 @@
 import urllib
 
 from tempest.common import service_client
-from tempest import config
 from tempest.services.identity.v3.json import base
 
-CONF = config.CONF
-
 
 class IdentityV3ClientJSON(base.IdentityV3Client):
 
diff --git a/tempest/services/identity/v3/json/token_client.py b/tempest/services/identity/v3/json/token_client.py
index 14c4a0a..1467d7c 100644
--- a/tempest/services/identity/v3/json/token_client.py
+++ b/tempest/services/identity/v3/json/token_client.py
@@ -13,6 +13,7 @@
 #    under the License.
 
 import json
+from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
 from tempest import config
@@ -112,7 +113,7 @@
 
         if resp.status in [401, 403]:
             resp_body = json.loads(resp_body)
-            raise exceptions.Unauthorized(resp_body['error']['message'])
+            raise lib_exc.Unauthorized(resp_body['error']['message'])
         elif resp.status not in [200, 201, 204]:
             raise exceptions.IdentityError(
                 'Unexpected status code {0}'.format(resp.status))
diff --git a/tempest/services/image/v1/json/image_client.py b/tempest/services/image/v1/json/image_client.py
index a7b8f63..0c05118 100644
--- a/tempest/services/image/v1/json/image_client.py
+++ b/tempest/services/image/v1/json/image_client.py
@@ -20,6 +20,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import glance_http
 from tempest.common import service_client
 from tempest.common.utils import misc as misc_utils
@@ -243,7 +245,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_image_meta(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/image/v2/json/image_client.py b/tempest/services/image/v2/json/image_client.py
index 4b1d52d..4cddc59 100644
--- a/tempest/services/image/v2/json/image_client.py
+++ b/tempest/services/image/v2/json/image_client.py
@@ -17,11 +17,11 @@
 import urllib
 
 import jsonschema
+from tempest_lib import exceptions as lib_exc
 
 from tempest.common import glance_http
 from tempest.common import service_client
 from tempest import config
-from tempest import exceptions
 
 CONF = config.CONF
 
@@ -120,7 +120,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_image(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/network/json/network_client.py b/tempest/services/network/json/network_client.py
index e92708c..5106225 100644
--- a/tempest/services/network/json/network_client.py
+++ b/tempest/services/network/json/network_client.py
@@ -14,6 +14,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import service_client
 from tempest.common.utils import misc
 from tempest import exceptions
@@ -211,7 +213,7 @@
             getattr(self, method)(id)
         except AttributeError:
             raise Exception("Unknown resource type %s " % resource_type)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/orchestration/json/orchestration_client.py b/tempest/services/orchestration/json/orchestration_client.py
index c813977..1a4c5d9 100644
--- a/tempest/services/orchestration/json/orchestration_client.py
+++ b/tempest/services/orchestration/json/orchestration_client.py
@@ -18,6 +18,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import service_client
 from tempest import exceptions
 
@@ -159,7 +161,7 @@
             try:
                 body = self.get_resource(
                     stack_identifier, resource_name)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 # ignore this, as the resource may not have
                 # been created yet
                 pass
@@ -194,7 +196,7 @@
         while True:
             try:
                 body = self.get_stack(stack_identifier)
-            except exceptions.NotFound:
+            except lib_exc.NotFound:
                 if status == 'DELETE_COMPLETE':
                     return
             stack_name = body['stack_name']
diff --git a/tempest/services/volume/json/admin/volume_types_client.py b/tempest/services/volume/json/admin/volume_types_client.py
index 6049eb6..c905155 100644
--- a/tempest/services/volume/json/admin/volume_types_client.py
+++ b/tempest/services/volume/json/admin/volume_types_client.py
@@ -19,7 +19,6 @@
 from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
-from tempest import exceptions
 
 
 class BaseVolumeTypesClientJSON(service_client.ServiceClient):
@@ -42,7 +41,7 @@
             else:
                 msg = (" resource value is either not defined or incorrect.")
                 raise lib_exc.UnprocessableEntity(msg)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/volume/json/qos_client.py b/tempest/services/volume/json/qos_client.py
index 6aa56f7..14ff506 100644
--- a/tempest/services/volume/json/qos_client.py
+++ b/tempest/services/volume/json/qos_client.py
@@ -27,7 +27,7 @@
     def is_resource_deleted(self, qos_id):
         try:
             self.get_qos(qos_id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/volume/json/snapshots_client.py b/tempest/services/volume/json/snapshots_client.py
index 100b34c..8430b63 100644
--- a/tempest/services/volume/json/snapshots_client.py
+++ b/tempest/services/volume/json/snapshots_client.py
@@ -14,6 +14,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import service_client
 from tempest import exceptions
 from tempest.openstack.common import log as logging
@@ -127,7 +129,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_snapshot(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/services/volume/json/volumes_client.py b/tempest/services/volume/json/volumes_client.py
index d834905..b906cec 100644
--- a/tempest/services/volume/json/volumes_client.py
+++ b/tempest/services/volume/json/volumes_client.py
@@ -17,6 +17,8 @@
 import time
 import urllib
 
+from tempest_lib import exceptions as lib_exc
+
 from tempest.common import service_client
 from tempest import config
 from tempest import exceptions
@@ -181,7 +183,7 @@
     def is_resource_deleted(self, id):
         try:
             self.get_volume(id)
-        except exceptions.NotFound:
+        except lib_exc.NotFound:
             return True
         return False
 
diff --git a/tempest/stress/driver.py b/tempest/stress/driver.py
index 49fac3d..1c27815 100644
--- a/tempest/stress/driver.py
+++ b/tempest/stress/driver.py
@@ -19,8 +19,8 @@
 
 from six import moves
 
-from tempest import auth
 from tempest import clients
+from tempest.common import cred_provider
 from tempest.common import ssh
 from tempest.common.utils import data_utils
 from tempest import config
@@ -148,9 +148,9 @@
                                             password,
                                             tenant['id'],
                                             "email")
-                creds = auth.get_credentials(username=username,
-                                             password=password,
-                                             tenant_name=tenant_name)
+                creds = cred_provider.get_credentials(username=username,
+                                                      password=password,
+                                                      tenant_name=tenant_name)
                 manager = clients.Manager(credentials=creds)
 
             test_obj = importutils.import_class(test['action'])
diff --git a/tempest/test.py b/tempest/test.py
index 28e1e2c..0c9cbfd 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -359,7 +359,7 @@
                                                    level=None))
 
     @classmethod
-    def get_client_manager(cls, interface=None):
+    def get_client_manager(cls):
         """
         Returns an OpenStack client manager
         """
@@ -373,12 +373,7 @@
             )
 
         creds = cls.isolated_creds.get_primary_creds()
-        params = dict(credentials=creds, service=cls._service)
-        if getattr(cls, '_interface', None):
-            interface = cls._interface
-        if interface:
-            params['interface'] = interface
-        os = clients.Manager(**params)
+        os = clients.Manager(credentials=creds, service=cls._service)
         return os
 
     @classmethod
@@ -394,8 +389,7 @@
         """
         Returns an instance of the Identity Admin API client
         """
-        os = clients.AdminManager(interface=cls._interface,
-                                  service=cls._service)
+        os = clients.AdminManager(service=cls._service)
         admin_client = os.identity_client
         return admin_client
 
@@ -436,8 +430,7 @@
         super(NegativeAutoTest, cls).setUpClass()
         os = cls.get_client_manager()
         cls.client = os.negative_client
-        os_admin = clients.AdminManager(interface=cls._interface,
-                                        service=cls._service)
+        os_admin = clients.AdminManager(service=cls._service)
         cls.admin_client = os_admin.negative_client
 
     @staticmethod
diff --git a/tempest/tests/common/test_cred_provider.py b/tempest/tests/common/test_cred_provider.py
new file mode 100644
index 0000000..160ecaa
--- /dev/null
+++ b/tempest/tests/common/test_cred_provider.py
@@ -0,0 +1,97 @@
+# Copyright 2015 Hewlett-Packard Development Company, L.P.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo.config import cfg
+
+from tempest import auth
+from tempest.common import cred_provider
+from tempest.common import tempest_fixtures as fixtures
+from tempest.services.identity.json import token_client as v2_client
+from tempest.services.identity.v3.json import token_client as v3_client
+from tempest.tests import fake_identity
+# Note: eventually the auth module will move to tempest-lib, and so wil its
+# unit tests. *CredentialsTests will be imported from tempest-lib then.
+from tempest.tests import test_credentials as test_creds
+
+
+class ConfiguredV2CredentialsTests(test_creds.CredentialsTests):
+    attributes = {
+        'username': 'fake_username',
+        'password': 'fake_password',
+        'tenant_name': 'fake_tenant_name'
+    }
+
+    identity_response = fake_identity._fake_v2_response
+    credentials_class = auth.KeystoneV2Credentials
+    tokenclient_class = v2_client.TokenClientJSON
+    identity_version = 'v2'
+
+    def setUp(self):
+        super(ConfiguredV2CredentialsTests, self).setUp()
+        self.stubs.Set(self.tokenclient_class, 'raw_request',
+                       self.identity_response)
+
+    def _verify_credentials(self, credentials_class, filled=True,
+                            identity_version=None):
+        for ctype in cred_provider.CREDENTIAL_TYPES:
+            if identity_version is None:
+                creds = cred_provider.get_configured_credentials(
+                    credential_type=ctype, fill_in=filled)
+            else:
+                creds = cred_provider.get_configured_credentials(
+                    credential_type=ctype, fill_in=filled,
+                    identity_version=identity_version)
+            self._check(creds, credentials_class, filled)
+
+    def test_get_configured_credentials(self):
+        self.useFixture(fixtures.LockFixture('auth_version'))
+        self._verify_credentials(credentials_class=self.credentials_class)
+
+    def test_get_configured_credentials_unfilled(self):
+        self.useFixture(fixtures.LockFixture('auth_version'))
+        self._verify_credentials(credentials_class=self.credentials_class,
+                                 filled=False)
+
+    def test_get_configured_credentials_version(self):
+        # version specified and not loaded from config
+        self.useFixture(fixtures.LockFixture('auth_version'))
+        self._verify_credentials(credentials_class=self.credentials_class,
+                                 identity_version=self.identity_version)
+
+    def test_is_valid(self):
+        creds = self._get_credentials()
+        self.assertTrue(creds.is_valid())
+
+
+class ConfiguredV3CredentialsTests(ConfiguredV2CredentialsTests):
+    attributes = {
+        'username': 'fake_username',
+        'password': 'fake_password',
+        'project_name': 'fake_project_name',
+        'user_domain_name': 'fake_domain_name'
+    }
+
+    credentials_class = auth.KeystoneV3Credentials
+    identity_response = fake_identity._fake_v3_response
+    tokenclient_class = v3_client.V3TokenClientJSON
+    identity_version = 'v3'
+
+    def setUp(self):
+        super(ConfiguredV3CredentialsTests, self).setUp()
+        # Additional config items reset by cfg fixture after each test
+        cfg.CONF.set_default('auth_version', 'v3', group='identity')
+        # Identity group items
+        for prefix in ['', 'alt_', 'admin_']:
+            cfg.CONF.set_default(prefix + 'domain_name', 'fake_domain_name',
+                                 group='identity')
diff --git a/tempest/tests/negative/test_negative_auto_test.py b/tempest/tests/negative/test_negative_auto_test.py
index fb1da43..7a127cd 100644
--- a/tempest/tests/negative/test_negative_auto_test.py
+++ b/tempest/tests/negative/test_negative_auto_test.py
@@ -21,7 +21,6 @@
 
 class TestNegativeAutoTest(base.TestCase):
     # Fake entries
-    _interface = 'json'
     _service = 'compute'
 
     fake_input_desc = {"name": "list-flavors-with-detail",
diff --git a/tempest/tests/test_auth.py b/tempest/tests/test_auth.py
index 90bb8a7..0317ad6 100644
--- a/tempest/tests/test_auth.py
+++ b/tempest/tests/test_auth.py
@@ -30,11 +30,7 @@
 from tempest.tests import fake_identity
 
 
-def fake_get_default_credentials(credential_type, fill_in=True):
-    return fake_credentials.FakeCredentials()
-
-
-def fake_get_credentials(credential_type=None, fill_in=True, **kwargs):
+def fake_get_credentials(fill_in=True, identity_version='v2', **kwargs):
     return fake_credentials.FakeCredentials()
 
 
@@ -54,8 +50,6 @@
         self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
         self.fake_http = fake_http.fake_httplib2(return_type=200)
         self.stubs.Set(auth, 'get_credentials', fake_get_credentials)
-        self.stubs.Set(auth, 'get_default_credentials',
-                       fake_get_default_credentials)
         self.auth_provider = self._auth(self.credentials)
 
 
@@ -87,11 +81,6 @@
     def test_check_credentials_bad_type(self):
         self.assertFalse(self.auth_provider.check_credentials([]))
 
-    def test_instantiate_with_dict(self):
-        # Dict credentials are only supported for backward compatibility
-        auth_provider = self._auth(credentials={})
-        self.assertIsInstance(auth_provider.credentials, auth.Credentials)
-
     def test_auth_data_property_when_cache_exists(self):
         self.auth_provider.cache = 'foo'
         self.useFixture(mockpatch.PatchObject(self.auth_provider,
diff --git a/tempest/tests/test_credentials.py b/tempest/tests/test_credentials.py
index 6e447d6..7621f6e 100644
--- a/tempest/tests/test_credentials.py
+++ b/tempest/tests/test_credentials.py
@@ -15,8 +15,6 @@
 
 import copy
 
-from oslo.config import cfg
-
 from tempest import auth
 from tempest.common import tempest_fixtures as fixtures
 from tempest import config
@@ -37,6 +35,18 @@
             attributes = self.attributes
         return self.credentials_class(**attributes)
 
+    def _check(self, credentials, credentials_class, filled):
+        # Check the right version of credentials has been returned
+        self.assertIsInstance(credentials, credentials_class)
+        # Check the id attributes are filled in
+        attributes = [x for x in credentials.ATTRIBUTES if (
+            '_id' in x and x != 'domain_id')]
+        for attr in attributes:
+            if filled:
+                self.assertIsNotNone(getattr(credentials, attr))
+            else:
+                self.assertIsNone(getattr(credentials, attr))
+
     def setUp(self):
         super(CredentialsTests, self).setUp()
         self.useFixture(fake_config.ConfigFixture())
@@ -51,18 +61,6 @@
                           self._get_credentials,
                           attributes=dict(invalid='fake'))
 
-    def test_default(self):
-        self.useFixture(fixtures.LockFixture('auth_version'))
-        for ctype in self.credentials_class.TYPES:
-            self.assertRaises(NotImplementedError,
-                              self.credentials_class.get_default,
-                              credentials_type=ctype)
-
-    def test_invalid_default(self):
-        self.assertRaises(exceptions.InvalidCredentials,
-                          auth.Credentials.get_default,
-                          credentials_type='invalid_type')
-
     def test_is_valid(self):
         creds = self._get_credentials()
         self.assertRaises(NotImplementedError, creds.is_valid)
@@ -78,39 +76,18 @@
     identity_response = fake_identity._fake_v2_response
     credentials_class = auth.KeystoneV2Credentials
     tokenclient_class = v2_client.TokenClientJSON
+    identity_version = 'v2'
 
     def setUp(self):
         super(KeystoneV2CredentialsTests, self).setUp()
         self.stubs.Set(self.tokenclient_class, 'raw_request',
                        self.identity_response)
 
-    def _verify_credentials(self, credentials_class, filled=True,
-                            creds_dict=None):
-
-        def _check(credentials):
-            # Check the right version of credentials has been returned
-            self.assertIsInstance(credentials, credentials_class)
-            # Check the id attributes are filled in
-            attributes = [x for x in credentials.ATTRIBUTES if (
-                '_id' in x and x != 'domain_id')]
-            for attr in attributes:
-                if filled:
-                    self.assertIsNotNone(getattr(credentials, attr))
-                else:
-                    self.assertIsNone(getattr(credentials, attr))
-
-        if creds_dict is None:
-            for ctype in auth.Credentials.TYPES:
-                creds = auth.get_default_credentials(credential_type=ctype,
-                                                     fill_in=filled)
-                _check(creds)
-        else:
-            creds = auth.get_credentials(fill_in=filled, **creds_dict)
-            _check(creds)
-
-    def test_get_default_credentials(self):
-        self.useFixture(fixtures.LockFixture('auth_version'))
-        self._verify_credentials(credentials_class=self.credentials_class)
+    def _verify_credentials(self, credentials_class, creds_dict, filled=True):
+        creds = auth.get_credentials(fill_in=filled,
+                                     identity_version=self.identity_version,
+                                     **creds_dict)
+        self._check(creds, credentials_class, filled)
 
     def test_get_credentials(self):
         self.useFixture(fixtures.LockFixture('auth_version'))
@@ -120,8 +97,8 @@
     def test_get_credentials_not_filled(self):
         self.useFixture(fixtures.LockFixture('auth_version'))
         self._verify_credentials(credentials_class=self.credentials_class,
-                                 filled=False,
-                                 creds_dict=self.attributes)
+                                 creds_dict=self.attributes,
+                                 filled=False)
 
     def test_is_valid(self):
         creds = self._get_credentials()
@@ -144,15 +121,6 @@
         # credential requirements
         self._test_is_not_valid('tenant_name')
 
-    def test_default(self):
-        self.useFixture(fixtures.LockFixture('auth_version'))
-        for ctype in self.credentials_class.TYPES:
-            creds = self.credentials_class.get_default(credentials_type=ctype)
-            for attr in self.attributes.keys():
-                # Default configuration values related to credentials
-                # are defined as fake_* in fake_config.py
-                self.assertEqual(getattr(creds, attr), 'fake_' + attr)
-
     def test_reset_all_attributes(self):
         creds = self._get_credentials()
         initial_creds = copy.deepcopy(creds)
@@ -189,28 +157,7 @@
     credentials_class = auth.KeystoneV3Credentials
     identity_response = fake_identity._fake_v3_response
     tokenclient_class = v3_client.V3TokenClientJSON
-
-    def setUp(self):
-        super(KeystoneV3CredentialsTests, self).setUp()
-        # Additional config items reset by cfg fixture after each test
-        cfg.CONF.set_default('auth_version', 'v3', group='identity')
-        # Identity group items
-        for prefix in ['', 'alt_', 'admin_']:
-            cfg.CONF.set_default(prefix + 'domain_name', 'fake_domain_name',
-                                 group='identity')
-
-    def test_default(self):
-        self.useFixture(fixtures.LockFixture('auth_version'))
-        for ctype in self.credentials_class.TYPES:
-            creds = self.credentials_class.get_default(credentials_type=ctype)
-            for attr in self.attributes.keys():
-                if attr == 'project_name':
-                    config_value = 'fake_tenant_name'
-                elif attr == 'user_domain_name':
-                    config_value = 'fake_domain_name'
-                else:
-                    config_value = 'fake_' + attr
-                self.assertEqual(getattr(creds, attr), config_value)
+    identity_version = 'v3'
 
     def test_is_not_valid(self):
         # NOTE(mtreinish) For a Keystone V3 credential object a project name