diff --git a/requirements.txt b/requirements.txt
index 370bb65..ffe6f26 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,11 +13,11 @@
 testrepository>=0.0.18
 pyOpenSSL>=0.14
 oslo.concurrency>=2.3.0 # Apache-2.0
-oslo.config>=2.6.0 # Apache-2.0
+oslo.config>=2.7.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
 oslo.log>=1.12.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
-oslo.utils!=2.6.0,>=2.4.0 # Apache-2.0
+oslo.utils>=2.8.0 # Apache-2.0
 six>=1.9.0
 iso8601>=0.1.9
 fixtures>=1.3.1
diff --git a/tempest/api/baremetal/admin/base.py b/tempest/api/baremetal/admin/base.py
index d7d2efe..80b69b9 100644
--- a/tempest/api/baremetal/admin/base.py
+++ b/tempest/api/baremetal/admin/base.py
@@ -98,8 +98,7 @@
     @classmethod
     @creates('chassis')
     def create_chassis(cls, description=None, expect_errors=False):
-        """
-        Wrapper utility for creating test chassis.
+        """Wrapper utility for creating test chassis.
 
         :param description: A description of the chassis. if not supplied,
             a random value will be generated.
@@ -114,8 +113,7 @@
     @creates('node')
     def create_node(cls, chassis_id, cpu_arch='x86', cpus=8, local_gb=10,
                     memory_mb=4096):
-        """
-        Wrapper utility for creating test baremetal nodes.
+        """Wrapper utility for creating test baremetal nodes.
 
         :param cpu_arch: CPU architecture of the node. Default: x86.
         :param cpus: Number of CPUs. Default: 8.
@@ -134,8 +132,7 @@
     @classmethod
     @creates('port')
     def create_port(cls, node_id, address, extra=None, uuid=None):
-        """
-        Wrapper utility for creating test ports.
+        """Wrapper utility for creating test ports.
 
         :param address: MAC address of the port.
         :param extra: Meta data of the port. If not supplied, an empty
@@ -152,8 +149,7 @@
 
     @classmethod
     def delete_chassis(cls, chassis_id):
-        """
-        Deletes a chassis having the specified UUID.
+        """Deletes a chassis having the specified UUID.
 
         :param uuid: The unique identifier of the chassis.
         :return: Server response.
@@ -169,8 +165,7 @@
 
     @classmethod
     def delete_node(cls, node_id):
-        """
-        Deletes a node having the specified UUID.
+        """Deletes a node having the specified UUID.
 
         :param uuid: The unique identifier of the node.
         :return: Server response.
@@ -186,8 +181,7 @@
 
     @classmethod
     def delete_port(cls, port_id):
-        """
-        Deletes a port having the specified UUID.
+        """Deletes a port having the specified UUID.
 
         :param uuid: The unique identifier of the port.
         :return: Server response.
diff --git a/tempest/api/compute/admin/test_agents.py b/tempest/api/compute/admin/test_agents.py
index 38f5fb7..d2b3a81 100644
--- a/tempest/api/compute/admin/test_agents.py
+++ b/tempest/api/compute/admin/test_agents.py
@@ -23,9 +23,7 @@
 
 
 class AgentsAdminTestJSON(base.BaseV2ComputeAdminTest):
-    """
-    Tests Agents API
-    """
+    """Tests Agents API"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_aggregates.py b/tempest/api/compute/admin/test_aggregates.py
index 4d05ff7..ddd9aa0 100644
--- a/tempest/api/compute/admin/test_aggregates.py
+++ b/tempest/api/compute/admin/test_aggregates.py
@@ -22,10 +22,7 @@
 
 
 class AggregatesAdminTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Aggregates API that require admin privileges
-    """
+    """Tests Aggregates API that require admin privileges"""
 
     _host_key = 'OS-EXT-SRV-ATTR:host'
 
diff --git a/tempest/api/compute/admin/test_aggregates_negative.py b/tempest/api/compute/admin/test_aggregates_negative.py
index bc1a854..181533b 100644
--- a/tempest/api/compute/admin/test_aggregates_negative.py
+++ b/tempest/api/compute/admin/test_aggregates_negative.py
@@ -22,10 +22,7 @@
 
 
 class AggregatesAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Aggregates API that require admin privileges
-    """
+    """Tests Aggregates API that require admin privileges"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_availability_zone.py b/tempest/api/compute/admin/test_availability_zone.py
index 5b02761..5befa53 100644
--- a/tempest/api/compute/admin/test_availability_zone.py
+++ b/tempest/api/compute/admin/test_availability_zone.py
@@ -18,9 +18,7 @@
 
 
 class AZAdminV2TestJSON(base.BaseV2ComputeAdminTest):
-    """
-    Tests Availability Zone API List
-    """
+    """Tests Availability Zone API List"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_availability_zone_negative.py b/tempest/api/compute/admin/test_availability_zone_negative.py
index be1c289..fe979d4 100644
--- a/tempest/api/compute/admin/test_availability_zone_negative.py
+++ b/tempest/api/compute/admin/test_availability_zone_negative.py
@@ -19,10 +19,7 @@
 
 
 class AZAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Availability Zone API List
-    """
+    """Tests Availability Zone API List"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_baremetal_nodes.py b/tempest/api/compute/admin/test_baremetal_nodes.py
index 2599d86..b764483 100644
--- a/tempest/api/compute/admin/test_baremetal_nodes.py
+++ b/tempest/api/compute/admin/test_baremetal_nodes.py
@@ -20,9 +20,7 @@
 
 
 class BaremetalNodesAdminTestJSON(base.BaseV2ComputeAdminTest):
-    """
-    Tests Baremetal API
-    """
+    """Tests Baremetal API"""
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/compute/admin/test_flavors.py b/tempest/api/compute/admin/test_flavors.py
index 085916e..1ef8f67 100644
--- a/tempest/api/compute/admin/test_flavors.py
+++ b/tempest/api/compute/admin/test_flavors.py
@@ -23,10 +23,7 @@
 
 
 class FlavorsAdminTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Flavors API Create and Delete that require admin privileges
-    """
+    """Tests Flavors API Create and Delete that require admin privileges"""
 
     @classmethod
     def skip_checks(cls):
diff --git a/tempest/api/compute/admin/test_flavors_access.py b/tempest/api/compute/admin/test_flavors_access.py
index 0a11d52..2063267 100644
--- a/tempest/api/compute/admin/test_flavors_access.py
+++ b/tempest/api/compute/admin/test_flavors_access.py
@@ -19,9 +19,8 @@
 
 
 class FlavorsAccessTestJSON(base.BaseV2ComputeAdminTest):
+    """Tests Flavor Access API extension.
 
-    """
-    Tests Flavor Access API extension.
     Add and remove Flavor Access require admin privileges.
     """
 
diff --git a/tempest/api/compute/admin/test_flavors_access_negative.py b/tempest/api/compute/admin/test_flavors_access_negative.py
index 89ae1b5..5070fd7 100644
--- a/tempest/api/compute/admin/test_flavors_access_negative.py
+++ b/tempest/api/compute/admin/test_flavors_access_negative.py
@@ -23,9 +23,8 @@
 
 
 class FlavorsAccessNegativeTestJSON(base.BaseV2ComputeAdminTest):
+    """Tests Flavor Access API extension.
 
-    """
-    Tests Flavor Access API extension.
     Add and remove Flavor Access require admin privileges.
     """
 
diff --git a/tempest/api/compute/admin/test_flavors_extra_specs.py b/tempest/api/compute/admin/test_flavors_extra_specs.py
index 25dce6a..661cd18 100644
--- a/tempest/api/compute/admin/test_flavors_extra_specs.py
+++ b/tempest/api/compute/admin/test_flavors_extra_specs.py
@@ -19,9 +19,8 @@
 
 
 class FlavorsExtraSpecsTestJSON(base.BaseV2ComputeAdminTest):
+    """Tests Flavor Extra Spec API extension.
 
-    """
-    Tests Flavor Extra Spec API extension.
     SET, UNSET, UPDATE Flavor Extra specs require admin privileges.
     GET Flavor Extra specs can be performed even by without admin privileges.
     """
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 aa95454..14646e8 100644
--- a/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
+++ b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
@@ -22,9 +22,8 @@
 
 
 class FlavorsExtraSpecsNegativeTestJSON(base.BaseV2ComputeAdminTest):
+    """Negative Tests Flavor Extra Spec API extension.
 
-    """
-    Negative Tests Flavor Extra Spec API extension.
     SET, UNSET, UPDATE Flavor Extra specs require admin privileges.
     """
 
diff --git a/tempest/api/compute/admin/test_floating_ips_bulk.py b/tempest/api/compute/admin/test_floating_ips_bulk.py
index e979616..fe05ddb 100644
--- a/tempest/api/compute/admin/test_floating_ips_bulk.py
+++ b/tempest/api/compute/admin/test_floating_ips_bulk.py
@@ -24,9 +24,8 @@
 
 
 class FloatingIPsBulkAdminTestJSON(base.BaseV2ComputeAdminTest):
-    """
-    Tests Floating IPs Bulk APIs Create, List and  Delete that
-    require admin privileges.
+    """Tests Floating IPs Bulk APIs that require admin privileges.
+
     API documentation - http://docs.openstack.org/api/openstack-compute/2/
     content/ext-os-floating-ips-bulk.html
     """
diff --git a/tempest/api/compute/admin/test_hosts.py b/tempest/api/compute/admin/test_hosts.py
index 6d8788f..f6ea3a4 100644
--- a/tempest/api/compute/admin/test_hosts.py
+++ b/tempest/api/compute/admin/test_hosts.py
@@ -18,10 +18,7 @@
 
 
 class HostsAdminTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests hosts API using admin privileges.
-    """
+    """Tests hosts API using admin privileges."""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_hosts_negative.py b/tempest/api/compute/admin/test_hosts_negative.py
index 4c8d8a2..65ada4d 100644
--- a/tempest/api/compute/admin/test_hosts_negative.py
+++ b/tempest/api/compute/admin/test_hosts_negative.py
@@ -20,10 +20,7 @@
 
 
 class HostsAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests hosts API using admin privileges.
-    """
+    """Tests hosts API using admin privileges."""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_hypervisor.py b/tempest/api/compute/admin/test_hypervisor.py
index 186867e..113ec40 100644
--- a/tempest/api/compute/admin/test_hypervisor.py
+++ b/tempest/api/compute/admin/test_hypervisor.py
@@ -18,10 +18,7 @@
 
 
 class HypervisorAdminTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Hypervisors API that require admin privileges
-    """
+    """Tests Hypervisors API that require admin privileges"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_hypervisor_negative.py b/tempest/api/compute/admin/test_hypervisor_negative.py
index ca4a691..0e8012a 100644
--- a/tempest/api/compute/admin/test_hypervisor_negative.py
+++ b/tempest/api/compute/admin/test_hypervisor_negative.py
@@ -23,10 +23,7 @@
 
 
 class HypervisorAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Hypervisors API that require admin privileges
-    """
+    """Tests Hypervisors API that require admin privileges"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_live_migration.py b/tempest/api/compute/admin/test_live_migration.py
index cfae772..7c4c30c 100644
--- a/tempest/api/compute/admin/test_live_migration.py
+++ b/tempest/api/compute/admin/test_live_migration.py
@@ -36,7 +36,7 @@
                         "not available" % cls.__name__)
             raise cls.skipException(skip_msg)
         if CONF.compute.min_compute_nodes < 2:
-            raise cls.skipTest(
+            raise cls.skipException(
                 "Less than 2 compute nodes, skipping migration test.")
 
     @classmethod
diff --git a/tempest/api/compute/admin/test_networks.py b/tempest/api/compute/admin/test_networks.py
index c4aa81b..e5c8790 100644
--- a/tempest/api/compute/admin/test_networks.py
+++ b/tempest/api/compute/admin/test_networks.py
@@ -21,9 +21,8 @@
 
 
 class NetworksTest(base.BaseV2ComputeAdminTest):
+    """Tests Nova Networks API that usually requires admin privileges.
 
-    """
-    Tests Nova Networks API that usually requires admin privileges.
     API docs:
     http://developer.openstack.org/api-ref-compute-v2-ext.html#ext-os-networks
     """
diff --git a/tempest/api/compute/admin/test_quotas.py b/tempest/api/compute/admin/test_quotas.py
index dbca6bb..fa1c666 100644
--- a/tempest/api/compute/admin/test_quotas.py
+++ b/tempest/api/compute/admin/test_quotas.py
@@ -151,8 +151,7 @@
 
 
 class QuotaClassesAdminTestJSON(base.BaseV2ComputeAdminTest):
-    """Tests the os-quota-class-sets API to update default quotas.
-    """
+    """Tests the os-quota-class-sets API to update default quotas."""
 
     def setUp(self):
         # All test cases in this class need to externally lock on doing
diff --git a/tempest/api/compute/admin/test_servers.py b/tempest/api/compute/admin/test_servers.py
index dfaa5d5..993d39e 100644
--- a/tempest/api/compute/admin/test_servers.py
+++ b/tempest/api/compute/admin/test_servers.py
@@ -22,10 +22,7 @@
 
 
 class ServersAdminTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Servers API using admin privileges
-    """
+    """Tests Servers API using admin privileges"""
 
     _host_key = 'OS-EXT-SRV-ATTR:host'
 
diff --git a/tempest/api/compute/admin/test_servers_negative.py b/tempest/api/compute/admin/test_servers_negative.py
index c2dc94c..3d0ce35 100644
--- a/tempest/api/compute/admin/test_servers_negative.py
+++ b/tempest/api/compute/admin/test_servers_negative.py
@@ -28,10 +28,7 @@
 
 
 class ServersAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Servers API using admin privileges
-    """
+    """Tests Servers API using admin privileges"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_services.py b/tempest/api/compute/admin/test_services.py
index 4d7dea5..8648b9f 100644
--- a/tempest/api/compute/admin/test_services.py
+++ b/tempest/api/compute/admin/test_services.py
@@ -19,10 +19,7 @@
 
 
 class ServicesAdminTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Services API. List and Enable/Disable require admin privileges.
-    """
+    """Tests Services API. List and Enable/Disable require admin privileges."""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/admin/test_services_negative.py b/tempest/api/compute/admin/test_services_negative.py
index 0c81ccb..e57401a 100644
--- a/tempest/api/compute/admin/test_services_negative.py
+++ b/tempest/api/compute/admin/test_services_negative.py
@@ -19,10 +19,7 @@
 
 
 class ServicesAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
-
-    """
-    Tests Services API. List and Enable/Disable require admin privileges.
-    """
+    """Tests Services API. List and Enable/Disable require admin privileges."""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index b006fc0..a5c0600 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -138,6 +138,7 @@
     @classmethod
     def server_check_teardown(cls):
         """Checks is the shared server clean enough for subsequent test.
+
            Method will delete the server when it's dirty.
            The setUp method is responsible for creating a new server.
            Exceptions raised in tearDown class are fails the test case,
diff --git a/tempest/api/compute/servers/test_availability_zone.py b/tempest/api/compute/servers/test_availability_zone.py
index 8f1f360..76da317 100644
--- a/tempest/api/compute/servers/test_availability_zone.py
+++ b/tempest/api/compute/servers/test_availability_zone.py
@@ -18,9 +18,7 @@
 
 
 class AZV2TestJSON(base.BaseV2ComputeTest):
-    """
-    Tests Availability Zone API List
-    """
+    """Tests Availability Zone API List"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/compute/servers/test_multiple_create.py b/tempest/api/compute/servers/test_multiple_create.py
index a945411..eb1beb1 100644
--- a/tempest/api/compute/servers/test_multiple_create.py
+++ b/tempest/api/compute/servers/test_multiple_create.py
@@ -25,10 +25,9 @@
         return data_utils.rand_name(self._name)
 
     def _create_multiple_servers(self, name=None, wait_until=None, **kwargs):
-        """
-        This is the right way to create_multiple servers and manage to get the
-        created servers into the servers list to be cleaned up after all.
-        """
+        # NOTE: This is the right way to create_multiple servers and manage to
+        # get the created servers into the servers list to be cleaned up after
+        # all.
         kwargs['name'] = name if name else self._generate_name()
         if wait_until:
             kwargs['wait_until'] = wait_until
diff --git a/tempest/api/compute/servers/test_multiple_create_negative.py b/tempest/api/compute/servers/test_multiple_create_negative.py
index 8135768..3d8a732 100644
--- a/tempest/api/compute/servers/test_multiple_create_negative.py
+++ b/tempest/api/compute/servers/test_multiple_create_negative.py
@@ -27,10 +27,8 @@
         return data_utils.rand_name(self._name)
 
     def _create_multiple_servers(self, name=None, wait_until=None, **kwargs):
-        """
-        This is the right way to create_multiple servers and manage to get the
-        created servers into the servers list to be cleaned up after all.
-        """
+        # This is the right way to create_multiple servers and manage to get
+        # the created servers into the servers list to be cleaned up after all.
         kwargs['name'] = kwargs.get('name', self._generate_name())
         body = self.create_test_server(**kwargs)
 
diff --git a/tempest/api/compute/servers/test_server_group.py b/tempest/api/compute/servers/test_server_group.py
index 9a04556..c23b365 100644
--- a/tempest/api/compute/servers/test_server_group.py
+++ b/tempest/api/compute/servers/test_server_group.py
@@ -21,8 +21,8 @@
 
 
 class ServerGroupTestJSON(base.BaseV2ComputeTest):
-    """
-    These tests check for the server-group APIs
+    """These tests check for the server-group APIs
+
     They create/delete server-groups with different policies.
     policies = affinity/anti-affinity
     It also adds the tests for list and get details of server-groups
diff --git a/tempest/api/compute/volumes/test_volumes_list.py b/tempest/api/compute/volumes/test_volumes_list.py
index f0ed141..990e429 100644
--- a/tempest/api/compute/volumes/test_volumes_list.py
+++ b/tempest/api/compute/volumes/test_volumes_list.py
@@ -23,14 +23,11 @@
 
 
 class VolumesTestJSON(base.BaseV2ComputeTest):
-
-    """
-    This test creates a number of 1G volumes. To run successfully,
-    ensure that the backing file for the volume group that Nova uses
-    has space for at least 3 1G volumes!
-    If you are running a Devstack environment, ensure that the
-    VOLUME_BACKING_FILE_SIZE is atleast 4G in your localrc
-    """
+    # NOTE: This test creates a number of 1G volumes. To run successfully,
+    # ensure that the backing file for the volume group that Nova uses
+    # has space for at least 3 1G volumes!
+    # If you are running a Devstack environment, ensure that the
+    # VOLUME_BACKING_FILE_SIZE is atleast 4G in your localrc
 
     @classmethod
     def skip_checks(cls):
diff --git a/tempest/api/data_processing/base.py b/tempest/api/data_processing/base.py
index 5d78539..4e88f65 100644
--- a/tempest/api/data_processing/base.py
+++ b/tempest/api/data_processing/base.py
@@ -399,6 +399,7 @@
     @classmethod
     def _get_default_version(cls):
         """Returns the default plugin version used for testing.
+
         This is gathered separately from the plugin to allow
         the usage of plugin name in skip_checks. This method is
         rather invoked into resource_setup, which allows API calls
@@ -439,6 +440,7 @@
     @classmethod
     def get_cluster_template(cls, node_group_template_ids=None):
         """Returns a cluster template for the default plugin.
+
         node_group_template_defined contains the type and ID of pre-defined
         node group templates that have to be used in the cluster template
         (instead of dynamically defining them with 'node_processes').
diff --git a/tempest/api/data_processing/test_cluster_templates.py b/tempest/api/data_processing/test_cluster_templates.py
index 42cbd14..dfd8e27 100644
--- a/tempest/api/data_processing/test_cluster_templates.py
+++ b/tempest/api/data_processing/test_cluster_templates.py
@@ -19,9 +19,9 @@
 
 
 class ClusterTemplateTest(dp_base.BaseDataProcessingTest):
-    """Link to the API documentation is http://docs.openstack.org/developer/
-    sahara/restapi/rest_api_v1.0.html#cluster-templates
-    """
+    # Link to the API documentation is http://docs.openstack.org/developer/
+    # sahara/restapi/rest_api_v1.0.html#cluster-templates
+
     @classmethod
     def skip_checks(cls):
         super(ClusterTemplateTest, cls).skip_checks()
diff --git a/tempest/api/data_processing/test_job_binaries.py b/tempest/api/data_processing/test_job_binaries.py
index 98b7e24..a47ddbc 100644
--- a/tempest/api/data_processing/test_job_binaries.py
+++ b/tempest/api/data_processing/test_job_binaries.py
@@ -18,9 +18,9 @@
 
 
 class JobBinaryTest(dp_base.BaseDataProcessingTest):
-    """Link to the API documentation is http://docs.openstack.org/developer/
-    sahara/restapi/rest_api_v1.1_EDP.html#job-binaries
-    """
+    # Link to the API documentation is http://docs.openstack.org/developer/
+    # sahara/restapi/rest_api_v1.1_EDP.html#job-binaries
+
     @classmethod
     def resource_setup(cls):
         super(JobBinaryTest, cls).resource_setup()
diff --git a/tempest/api/data_processing/test_job_binary_internals.py b/tempest/api/data_processing/test_job_binary_internals.py
index 6919fa5..b4f0769 100644
--- a/tempest/api/data_processing/test_job_binary_internals.py
+++ b/tempest/api/data_processing/test_job_binary_internals.py
@@ -18,9 +18,9 @@
 
 
 class JobBinaryInternalTest(dp_base.BaseDataProcessingTest):
-    """Link to the API documentation is http://docs.openstack.org/developer/
-    sahara/restapi/rest_api_v1.1_EDP.html#job-binary-internals
-    """
+    # Link to the API documentation is http://docs.openstack.org/developer/
+    # sahara/restapi/rest_api_v1.1_EDP.html#job-binary-internals
+
     @classmethod
     def resource_setup(cls):
         super(JobBinaryInternalTest, cls).resource_setup()
diff --git a/tempest/api/data_processing/test_jobs.py b/tempest/api/data_processing/test_jobs.py
index 7798056..8503320 100644
--- a/tempest/api/data_processing/test_jobs.py
+++ b/tempest/api/data_processing/test_jobs.py
@@ -18,9 +18,9 @@
 
 
 class JobTest(dp_base.BaseDataProcessingTest):
-    """Link to the API documentation is http://docs.openstack.org/developer/
-    sahara/restapi/rest_api_v1.1_EDP.html#jobs
-    """
+    # NOTE: Link to the API documentation: http://docs.openstack.org/developer/
+    # sahara/restapi/rest_api_v1.1_EDP.html#jobs
+
     @classmethod
     def resource_setup(cls):
         super(JobTest, cls).resource_setup()
diff --git a/tempest/api/identity/admin/v2/test_tokens.py b/tempest/api/identity/admin/v2/test_tokens.py
index e808990..0e7a480 100644
--- a/tempest/api/identity/admin/v2/test_tokens.py
+++ b/tempest/api/identity/admin/v2/test_tokens.py
@@ -52,8 +52,9 @@
 
     @test.idempotent_id('25ba82ee-8a32-4ceb-8f50-8b8c71e8765e')
     def test_rescope_token(self):
-        """An unscoped token can be requested, that token can be used to
-           request a scoped token.
+        """An unscoped token can be requested
+
+        That token can be used to request a scoped token.
         """
 
         # Create a user.
diff --git a/tempest/api/identity/admin/v3/test_domains_negative.py b/tempest/api/identity/admin/v3/test_domains_negative.py
index 910fe5f..9eb3149 100644
--- a/tempest/api/identity/admin/v3/test_domains_negative.py
+++ b/tempest/api/identity/admin/v3/test_domains_negative.py
@@ -52,3 +52,21 @@
         d_name = 'a' * 65
         self.assertRaises(lib_exc.BadRequest, self.client.create_domain,
                           d_name)
+
+    @test.attr(type=['negative'])
+    @test.idempotent_id('43781c07-764f-4cf2-a405-953c1916f605')
+    def test_delete_non_existent_domain(self):
+        # Attempt to delete a non existent domain should fail
+        self.assertRaises(lib_exc.NotFound, self.client.delete_domain,
+                          data_utils.rand_uuid_hex())
+
+    @test.attr(type=['negative'])
+    @test.idempotent_id('e6f9e4a2-4f36-4be8-bdbc-4e199ae29427')
+    def test_domain_create_duplicate(self):
+        domain_name = data_utils.rand_name('domain-dup')
+        domain = self.client.create_domain(domain_name)['domain']
+        domain_id = domain['id']
+        self.addCleanup(self.delete_domain, domain_id)
+        # Domain name should be unique
+        self.assertRaises(
+            lib_exc.Conflict, self.client.create_domain, domain_name)
diff --git a/tempest/api/identity/base.py b/tempest/api/identity/base.py
index 05ef325..c56f4fb 100644
--- a/tempest/api/identity/base.py
+++ b/tempest/api/identity/base.py
@@ -120,11 +120,6 @@
         super(BaseIdentityV3Test, cls).setup_clients()
         cls.non_admin_client = cls.os.identity_v3_client
         cls.non_admin_token = cls.os.token_v3_client
-        cls.non_admin_endpoints_client = cls.os.endpoints_client
-        cls.non_admin_region_client = cls.os.region_client
-        cls.non_admin_service_client = cls.os.service_client
-        cls.non_admin_policy_client = cls.os.policy_client
-        cls.non_admin_creds_client = cls.os.credentials_client
 
     @classmethod
     def resource_cleanup(cls):
diff --git a/tempest/api/image/admin/v2/test_images.py b/tempest/api/image/admin/v2/test_images.py
index 09877ba..01838b6 100644
--- a/tempest/api/image/admin/v2/test_images.py
+++ b/tempest/api/image/admin/v2/test_images.py
@@ -26,10 +26,8 @@
 
 
 class BasicAdminOperationsImagesTest(base.BaseV2ImageAdminTest):
+    """Here we test admin operations of images"""
 
-    """
-    Here we test admin operations of images
-    """
     @testtools.skipUnless(CONF.image_feature_enabled.deactivate_image,
                           'deactivate-image is not available.')
     @test.idempotent_id('951ebe01-969f-4ea9-9898-8a3f1f442ab0')
diff --git a/tempest/api/image/v1/test_images.py b/tempest/api/image/v1/test_images.py
index d4dbfcd..64f3174 100644
--- a/tempest/api/image/v1/test_images.py
+++ b/tempest/api/image/v1/test_images.py
@@ -100,10 +100,7 @@
 
 
 class ListImagesTest(base.BaseV1ImageTest):
-
-    """
-    Here we test the listing of image information
-    """
+    """Here we test the listing of image information"""
 
     @classmethod
     def resource_setup(cls):
@@ -131,10 +128,8 @@
 
     @classmethod
     def _create_remote_image(cls, name, container_format, disk_format):
-        """
-        Create a new remote image and return the ID of the newly-registered
-        image
-        """
+        """Create a new remote image and return newly-registered image-id"""
+
         name = 'New Remote Image %s' % name
         location = CONF.image.http_image
         image = cls.create_image(name=name,
@@ -148,9 +143,9 @@
     @classmethod
     def _create_standard_image(cls, name, container_format,
                                disk_format, size):
-        """
-        Create a new standard image and return the ID of the newly-registered
-        image. Note that the size of the new image is a random number between
+        """Create a new standard image and return newly-registered image-id
+
+        Note that the size of the new image is a random number between
         1024 and 4096
         """
         image_file = moves.cStringIO(data_utils.random_bytes(size))
@@ -241,10 +236,8 @@
     @classmethod
     def _create_standard_image(cls, name, container_format,
                                disk_format, size):
-        """
-        Create a new standard image and return the ID of the newly-registered
-        image.
-        """
+        """Create a new standard image and return newly-registered image-id"""
+
         image_file = moves.cStringIO(data_utils.random_bytes(size))
         name = 'New Standard Image %s' % name
         image = cls.create_image(name=name,
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index bacf211..936eadf 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -29,17 +29,15 @@
 
 
 class BasicOperationsImagesTest(base.BaseV2ImageTest):
-    """
-    Here we test the basic operations of images
-    """
+    """Here we test the basic operations of images"""
 
     @test.attr(type='smoke')
     @test.idempotent_id('139b765e-7f3d-4b3d-8b37-3ca3876ee318')
     def test_register_upload_get_image_file(self):
+        """Here we test these functionalities
 
-        """
-        Here we test these functionalities - Register image,
-        upload the image file, get image and get image file api's
+        Register image, upload the image file, get image and get image
+        file api's
         """
 
         uuid = '00000000-1111-2222-3333-444455556666'
@@ -135,9 +133,7 @@
 
 
 class ListImagesTest(base.BaseV2ImageTest):
-    """
-    Here we test the listing of image information
-    """
+    """Here we test the listing of image information"""
 
     @classmethod
     def resource_setup(cls):
@@ -158,9 +154,9 @@
 
     @classmethod
     def _create_standard_image(cls, container_format, disk_format):
-        """
-        Create a new standard image and return the ID of the newly-registered
-        image. Note that the size of the new image is a random number between
+        """Create a new standard image and return the newly-registered image-id
+
+        Note that the size of the new image is a random number between
         1024 and 4096
         """
         size = random.randint(1024, 4096)
@@ -176,9 +172,8 @@
         return image_id
 
     def _list_by_param_value_and_assert(self, params):
-        """
-        Perform list action with given params and validates result.
-        """
+        """Perform list action with given params and validates result."""
+
         images_list = self.client.list_images(params=params)['images']
         # Validating params of fetched images
         for image in images_list:
diff --git a/tempest/api/image/v2/test_images_metadefs_namespaces.py b/tempest/api/image/v2/test_images_metadefs_namespaces.py
index 21247b1..d089c84 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespaces.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespaces.py
@@ -20,9 +20,8 @@
 
 
 class MetadataNamespacesTest(base.BaseV2ImageTest):
-    """
-    Here we will test the Metadata definition Namespaces basic functionality.
-    """
+    """Test the Metadata definition Namespaces basic functionality"""
+
     @test.idempotent_id('319b765e-7f3d-4b3d-8b37-3ca3876ee768')
     def test_basic_metadata_definition_namespaces(self):
         # get the available resource types and use one resource_type
diff --git a/tempest/api/image/v2/test_images_negative.py b/tempest/api/image/v2/test_images_negative.py
index c5c5e8b..71c8c7a 100644
--- a/tempest/api/image/v2/test_images_negative.py
+++ b/tempest/api/image/v2/test_images_negative.py
@@ -24,8 +24,7 @@
 
 class ImagesNegativeTest(base.BaseV2ImageTest):
 
-    """
-    here we have -ve tests for show_image and delete_image api
+    """here we have -ve tests for show_image and delete_image api
 
     Tests
         ** get non-existent image
diff --git a/tempest/api/messaging/base.py b/tempest/api/messaging/base.py
index 64a7fd5..39dc7c3 100644
--- a/tempest/api/messaging/base.py
+++ b/tempest/api/messaging/base.py
@@ -26,8 +26,7 @@
 
 class BaseMessagingTest(test.BaseTestCase):
 
-    """
-    Base class for the Messaging tests that use the Tempest Zaqar REST client
+    """Base class for the Messaging (Zaqar) tests
 
     It is assumed that the following option is defined in the
     [service_available] section of etc/tempest.conf
diff --git a/tempest/api/network/admin/test_agent_management.py b/tempest/api/network/admin/test_agent_management.py
index 128398b..c5d0d57 100644
--- a/tempest/api/network/admin/test_agent_management.py
+++ b/tempest/api/network/admin/test_agent_management.py
@@ -79,9 +79,8 @@
         self.assertEqual(updated_description, description)
 
     def _restore_agent(self):
-        """
-        Restore the agent description after update test.
-        """
+        """Restore the agent description after update test"""
+
         description = self.agent['description'] or ''
         origin_agent = {'description': description}
         self.admin_client.update_agent(agent_id=self.agent['id'],
diff --git a/tempest/api/network/admin/test_external_network_extension.py b/tempest/api/network/admin/test_external_network_extension.py
index ac53587..a32bfbc 100644
--- a/tempest/api/network/admin/test_external_network_extension.py
+++ b/tempest/api/network/admin/test_external_network_extension.py
@@ -91,12 +91,9 @@
 
     @test.idempotent_id('82068503-2cf2-4ed4-b3be-ecb89432e4bb')
     def test_delete_external_networks_with_floating_ip(self):
-        """Verifies external network can be deleted while still holding
-        (unassociated) floating IPs
+        # Verifies external network can be deleted while still holding
+        # (unassociated) floating IPs
 
-        """
-        # Set cls.client to admin to use base.create_subnet()
-        client = self.admin_client
         body = self.admin_networks_client.create_network(
             **{'router:external': True})
         external_network = body['network']
@@ -106,19 +103,19 @@
         subnet = self.create_subnet(
             external_network, client=self.admin_subnets_client,
             enable_dhcp=False)
-        body = client.create_floatingip(
+        body = self.admin_floating_ips_client.create_floatingip(
             floating_network_id=external_network['id'])
         created_floating_ip = body['floatingip']
         self.addCleanup(self._try_delete_resource,
-                        client.delete_floatingip,
+                        self.admin_floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
-        floatingip_list = client.list_floatingips(
+        floatingip_list = self.admin_floating_ips_client.list_floatingips(
             network=external_network['id'])
         self.assertIn(created_floating_ip['id'],
                       (f['id'] for f in floatingip_list['floatingips']))
         self.admin_networks_client.delete_network(external_network['id'])
         # Verifies floating ip is deleted
-        floatingip_list = client.list_floatingips()
+        floatingip_list = self.admin_floating_ips_client.list_floatingips()
         self.assertNotIn(created_floating_ip['id'],
                          (f['id'] for f in floatingip_list['floatingips']))
         # Verifies subnet is deleted
diff --git a/tempest/api/network/admin/test_external_networks_negative.py b/tempest/api/network/admin/test_external_networks_negative.py
index 8dfce24..d031108 100644
--- a/tempest/api/network/admin/test_external_networks_negative.py
+++ b/tempest/api/network/admin/test_external_networks_negative.py
@@ -27,19 +27,16 @@
     @test.attr(type=['negative'])
     @test.idempotent_id('d402ae6c-0be0-4d8e-833b-a738895d98d0')
     def test_create_port_with_precreated_floatingip_as_fixed_ip(self):
-        """
-        External networks can be used to create both floating-ip as well
-        as instance-ip. So, creating an instance-ip with a value of a
-        pre-created floating-ip should be denied.
-        """
+        # NOTE: External networks can be used to create both floating-ip as
+        # well as instance-ip. So, creating an instance-ip with a value of a
+        # pre-created floating-ip should be denied.
 
         # create a floating ip
-        client = self.admin_client
-        body = client.create_floatingip(
+        body = self.admin_floating_ips_client.create_floatingip(
             floating_network_id=CONF.network.public_network_id)
         created_floating_ip = body['floatingip']
         self.addCleanup(self._try_delete_resource,
-                        client.delete_floatingip,
+                        self.admin_floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
         floating_ip_address = created_floating_ip['floating_ip_address']
         self.assertIsNotNone(floating_ip_address)
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 dfe7307..6ad374b 100644
--- a/tempest/api/network/admin/test_floating_ips_admin_actions.py
+++ b/tempest/api/network/admin/test_floating_ips_admin_actions.py
@@ -29,6 +29,7 @@
     def setup_clients(cls):
         super(FloatingIPAdminTestJSON, cls).setup_clients()
         cls.alt_client = cls.alt_manager.network_client
+        cls.alt_floating_ips_client = cls.alt_manager.floating_ips_client
 
     @classmethod
     def resource_setup(cls):
@@ -45,18 +46,18 @@
     @test.idempotent_id('64f2100b-5471-4ded-b46c-ddeeeb4f231b')
     def test_list_floating_ips_from_admin_and_nonadmin(self):
         # Create floating ip from admin user
-        floating_ip_admin = self.admin_client.create_floatingip(
+        floating_ip_admin = self.admin_floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id)
-        self.addCleanup(self.admin_client.delete_floatingip,
+        self.addCleanup(self.admin_floating_ips_client.delete_floatingip,
                         floating_ip_admin['floatingip']['id'])
         # Create floating ip from alt user
-        body = self.alt_client.create_floatingip(
+        body = self.alt_floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id)
         floating_ip_alt = body['floatingip']
-        self.addCleanup(self.alt_client.delete_floatingip,
+        self.addCleanup(self.alt_floating_ips_client.delete_floatingip,
                         floating_ip_alt['id'])
         # List floating ips from admin
-        body = self.admin_client.list_floatingips()
+        body = self.admin_floating_ips_client.list_floatingips()
         floating_ip_ids_admin = [f['id'] for f in body['floatingips']]
         # Check that admin sees all floating ips
         self.assertIn(self.floating_ip['id'], floating_ip_ids_admin)
@@ -64,7 +65,7 @@
                       floating_ip_ids_admin)
         self.assertIn(floating_ip_alt['id'], floating_ip_ids_admin)
         # List floating ips from nonadmin
-        body = self.client.list_floatingips()
+        body = self.floating_ips_client.list_floatingips()
         floating_ip_ids = [f['id'] for f in body['floatingips']]
         # Check that nonadmin user doesn't see floating ip created from admin
         # and floating ip that is created in another tenant (alt user)
@@ -76,12 +77,12 @@
     @test.idempotent_id('32727cc3-abe2-4485-a16e-48f2d54c14f2')
     def test_create_list_show_floating_ip_with_tenant_id_by_admin(self):
         # Creates a floating IP
-        body = self.admin_client.create_floatingip(
+        body = self.admin_floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id,
             tenant_id=self.network['tenant_id'],
             port_id=self.port['id'])
         created_floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip,
+        self.addCleanup(self.floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
         self.assertIsNotNone(created_floating_ip['id'])
         self.assertIsNotNone(created_floating_ip['tenant_id'])
@@ -93,7 +94,7 @@
         self.assertEqual(created_floating_ip['fixed_ip_address'],
                          port[0]['ip_address'])
         # Verifies the details of a floating_ip
-        floating_ip = self.admin_client.show_floatingip(
+        floating_ip = self.admin_floating_ips_client.show_floatingip(
             created_floating_ip['id'])
         shown_floating_ip = floating_ip['floatingip']
         self.assertEqual(shown_floating_ip['id'], created_floating_ip['id'])
@@ -105,6 +106,6 @@
                          created_floating_ip['floating_ip_address'])
         self.assertEqual(shown_floating_ip['port_id'], self.port['id'])
         # Verify the floating ip exists in the list of all floating_ips
-        floating_ips = self.admin_client.list_floatingips()
+        floating_ips = self.admin_floating_ips_client.list_floatingips()
         floatingip_id_list = [f['id'] for f in floating_ips['floatingips']]
         self.assertIn(created_floating_ip['id'], floatingip_id_list)
diff --git a/tempest/api/network/admin/test_quotas.py b/tempest/api/network/admin/test_quotas.py
index f5c5784..4a25206 100644
--- a/tempest/api/network/admin/test_quotas.py
+++ b/tempest/api/network/admin/test_quotas.py
@@ -21,9 +21,7 @@
 
 
 class QuotasTest(base.BaseAdminNetworkTest):
-    """
-    Tests the following operations in the Neutron API using the REST client for
-    Neutron:
+    """Tests the following operations in the Neutron API:
 
         list quotas for tenants who have non-default quota values
         show quotas for a specified tenant
diff --git a/tempest/api/network/admin/test_routers_dvr.py b/tempest/api/network/admin/test_routers_dvr.py
index 365698d..3e787af 100644
--- a/tempest/api/network/admin/test_routers_dvr.py
+++ b/tempest/api/network/admin/test_routers_dvr.py
@@ -42,7 +42,8 @@
 
     @test.idempotent_id('08a2a0a8-f1e4-4b34-8e30-e522e836c44e')
     def test_distributed_router_creation(self):
-        """
+        """Test distributed router creation
+
         Test uses administrative credentials to creates a
         DVR (Distributed Virtual Routing) router using the
         distributed=True.
@@ -59,7 +60,8 @@
 
     @test.idempotent_id('8a0a72b4-7290-4677-afeb-b4ffe37bc352')
     def test_centralized_router_creation(self):
-        """
+        """Test centralized router creation
+
         Test uses administrative credentials to creates a
         CVR (Centralized Virtual Routing) router using the
         distributed=False.
@@ -77,10 +79,11 @@
 
     @test.idempotent_id('acd43596-c1fb-439d-ada8-31ad48ae3c2e')
     def test_centralized_router_update_to_dvr(self):
-        """
+        """Test centralized router update
+
         Test uses administrative credentials to creates a
         CVR (Centralized Virtual Routing) router using the
-        distributed=False.Then it will "update" the router
+        distributed=False. Then it will "update" the router
         distributed attribute to True
 
         Acceptance
diff --git a/tempest/api/network/base.py b/tempest/api/network/base.py
index 5198ae8..b798cb2 100644
--- a/tempest/api/network/base.py
+++ b/tempest/api/network/base.py
@@ -28,9 +28,7 @@
 
 
 class BaseNetworkTest(tempest.test.BaseTestCase):
-
-    """
-    Base class for the Neutron tests that use the Tempest Neutron REST client
+    """Base class for the Neutron tests
 
     Per the Neutron API Guide, API v1.x was removed from the source code tree
     (docs.openstack.org/api/openstack-network/2.0/content/Overview-d1e71.html)
@@ -76,6 +74,7 @@
         cls.networks_client = cls.os.networks_client
         cls.subnets_client = cls.os.subnets_client
         cls.ports_client = cls.os.ports_client
+        cls.floating_ips_client = cls.os.floating_ips_client
 
     @classmethod
     def resource_setup(cls):
@@ -94,8 +93,9 @@
         if CONF.service_available.neutron:
             # Clean up floating IPs
             for floating_ip in cls.floating_ips:
-                cls._try_delete_resource(cls.client.delete_floatingip,
-                                         floating_ip['id'])
+                cls._try_delete_resource(
+                    cls.floating_ips_client.delete_floatingip,
+                    floating_ip['id'])
 
             # Clean up metering label rules
             for metering_label_rule in cls.metering_label_rules:
@@ -234,7 +234,7 @@
     @classmethod
     def create_floatingip(cls, external_network_id):
         """Wrapper utility that returns a test floating IP."""
-        body = cls.client.create_floatingip(
+        body = cls.floating_ips_client.create_floatingip(
             floating_network_id=external_network_id)
         fip = body['floatingip']
         cls.floating_ips.append(fip)
@@ -271,6 +271,7 @@
         cls.admin_networks_client = cls.os_adm.networks_client
         cls.admin_subnets_client = cls.os_adm.subnets_client
         cls.admin_ports_client = cls.os_adm.ports_client
+        cls.admin_floating_ips_client = cls.os_adm.floating_ips_client
 
     @classmethod
     def create_metering_label(cls, name, description):
diff --git a/tempest/api/network/test_allowed_address_pair.py b/tempest/api/network/test_allowed_address_pair.py
index 41714aa..394aec1 100644
--- a/tempest/api/network/test_allowed_address_pair.py
+++ b/tempest/api/network/test_allowed_address_pair.py
@@ -23,9 +23,9 @@
 
 
 class AllowedAddressPairTestJSON(base.BaseNetworkTest):
-    """
-    Tests the Neutron Allowed Address Pair API extension using the Tempest
-    ReST client. The following API operations are tested with this extension:
+    """Tests the Neutron Allowed Address Pair API extension
+
+    The following API operations are tested with this extension:
 
         create port
         list ports
diff --git a/tempest/api/network/test_dhcp_ipv6.py b/tempest/api/network/test_dhcp_ipv6.py
index 27713a2..ceb7906 100644
--- a/tempest/api/network/test_dhcp_ipv6.py
+++ b/tempest/api/network/test_dhcp_ipv6.py
@@ -99,10 +99,9 @@
 
     @test.idempotent_id('e5517e62-6f16-430d-a672-f80875493d4c')
     def test_dhcpv6_stateless_eui64(self):
-        """When subnets configured with RAs SLAAC (AOM=100) and DHCP stateless
-        (AOM=110) both for radvd and dnsmasq, port shall receive IP address
-        calculated from its MAC.
-        """
+        # NOTE: When subnets configured with RAs SLAAC (AOM=100) and DHCP
+        # stateless (AOM=110) both for radvd and dnsmasq, port shall receive
+        # IP address calculated from its MAC.
         for ra_mode, add_mode in (
                 ('slaac', 'slaac'),
                 ('dhcpv6-stateless', 'dhcpv6-stateless'),
@@ -118,10 +117,9 @@
 
     @test.idempotent_id('ae2f4a5d-03ff-4c42-a3b0-ce2fcb7ea832')
     def test_dhcpv6_stateless_no_ra(self):
-        """When subnets configured with dnsmasq SLAAC and DHCP stateless
-        and there is no radvd, port shall receive IP address calculated
-        from its MAC and mask of subnet.
-        """
+        # NOTE: When subnets configured with dnsmasq SLAAC and DHCP stateless
+        # and there is no radvd, port shall receive IP address calculated
+        # from its MAC and mask of subnet.
         for ra_mode, add_mode in (
                 (None, 'slaac'),
                 (None, 'dhcpv6-stateless'),
@@ -158,9 +156,8 @@
 
     @test.idempotent_id('21635b6f-165a-4d42-bf49-7d195e47342f')
     def test_dhcpv6_stateless_no_ra_no_dhcp(self):
-        """If no radvd option and no dnsmasq option is configured
-        port shall receive IP from fixed IPs list of subnet.
-        """
+        # NOTE: If no radvd option and no dnsmasq option is configured
+        # port shall receive IP from fixed IPs list of subnet.
         real_ip, eui_ip = self._get_ips_from_subnet()
         self._clean_network()
         self.assertNotEqual(eui_ip, real_ip,
@@ -171,11 +168,10 @@
 
     @test.idempotent_id('4544adf7-bb5f-4bdc-b769-b3e77026cef2')
     def test_dhcpv6_two_subnets(self):
-        """When one IPv6 subnet configured with dnsmasq SLAAC or DHCP stateless
-        and other IPv6 is with DHCP stateful, port shall receive EUI-64 IP
-        addresses from first subnet and DHCP address from second one.
-        Order of subnet creating should be unimportant.
-        """
+        # NOTE: When one IPv6 subnet configured with dnsmasq SLAAC or DHCP
+        # stateless and other IPv6 is with DHCP stateful, port shall receive
+        # EUI-64 IP addresses from first subnet and DHCP address from second
+        # one. Order of subnet creating should be unimportant.
         for order in ("slaac_first", "dhcp_first"):
             for ra_mode, add_mode in (
                     ('slaac', 'slaac'),
@@ -221,11 +217,10 @@
 
     @test.idempotent_id('4256c61d-c538-41ea-9147-3c450c36669e')
     def test_dhcpv6_64_subnets(self):
-        """When one IPv6 subnet configured with dnsmasq SLAAC or DHCP stateless
-        and other IPv4 is with DHCP of IPv4, port shall receive EUI-64 IP
-        addresses from first subnet and IPv4 DHCP address from second one.
-        Order of subnet creating should be unimportant.
-        """
+        # NOTE: When one IPv6 subnet configured with dnsmasq SLAAC or DHCP
+        # stateless and other IPv4 is with DHCP of IPv4, port shall receive
+        # EUI-64 IP addresses from first subnet and IPv4 DHCP address from
+        # second one. Order of subnet creating should be unimportant.
         for order in ("slaac_first", "dhcp_first"):
             for ra_mode, add_mode in (
                     ('slaac', 'slaac'),
@@ -265,9 +260,8 @@
 
     @test.idempotent_id('4ab211a0-276f-4552-9070-51e27f58fecf')
     def test_dhcp_stateful(self):
-        """With all options below, DHCPv6 shall allocate address
-        from subnet pool to port.
-        """
+        # NOTE: With all options below, DHCPv6 shall allocate address from
+        # subnet pool to port.
         for ra_mode, add_mode in (
                 ('dhcpv6-stateful', 'dhcpv6-stateful'),
                 ('dhcpv6-stateful', None),
@@ -287,10 +281,9 @@
 
     @test.idempotent_id('51a5e97f-f02e-4e4e-9a17-a69811d300e3')
     def test_dhcp_stateful_fixedips(self):
-        """With all options below, port shall be able to get
-        requested IP from fixed IP range not depending on
-        DHCP stateful (not SLAAC!) settings configured.
-        """
+        # NOTE: With all options below, port shall be able to get
+        # requested IP from fixed IP range not depending on
+        # DHCP stateful (not SLAAC!) settings configured.
         for ra_mode, add_mode in (
                 ('dhcpv6-stateful', 'dhcpv6-stateful'),
                 ('dhcpv6-stateful', None),
@@ -316,9 +309,8 @@
 
     @test.idempotent_id('98244d88-d990-4570-91d4-6b25d70d08af')
     def test_dhcp_stateful_fixedips_outrange(self):
-        """When port gets IP address from fixed IP range it
-        shall be checked if it's from subnets range.
-        """
+        # NOTE: When port gets IP address from fixed IP range it
+        # shall be checked if it's from subnets range.
         kwargs = {'ipv6_ra_mode': 'dhcpv6-stateful',
                   'ipv6_address_mode': 'dhcpv6-stateful'}
         subnet = self.create_subnet(self.network, **kwargs)
@@ -334,9 +326,8 @@
 
     @test.idempotent_id('57b8302b-cba9-4fbb-8835-9168df029051')
     def test_dhcp_stateful_fixedips_duplicate(self):
-        """When port gets IP address from fixed IP range it
-        shall be checked if it's not duplicate.
-        """
+        # NOTE: When port gets IP address from fixed IP range it
+        # shall be checked if it's not duplicate.
         kwargs = {'ipv6_ra_mode': 'dhcpv6-stateful',
                   'ipv6_address_mode': 'dhcpv6-stateful'}
         subnet = self.create_subnet(self.network, **kwargs)
@@ -367,9 +358,8 @@
 
     @test.idempotent_id('e98f65db-68f4-4330-9fea-abd8c5192d4d')
     def test_dhcp_stateful_router(self):
-        """With all options below the router interface shall
-        receive DHCPv6 IP address from allocation pool.
-        """
+        # NOTE: With all options below the router interface shall
+        # receive DHCPv6 IP address from allocation pool.
         for ra_mode, add_mode in (
                 ('dhcpv6-stateful', 'dhcpv6-stateful'),
                 ('dhcpv6-stateful', None),
diff --git a/tempest/api/network/test_extensions.py b/tempest/api/network/test_extensions.py
index d6b03eb..b83d2b0 100644
--- a/tempest/api/network/test_extensions.py
+++ b/tempest/api/network/test_extensions.py
@@ -19,10 +19,7 @@
 
 
 class ExtensionsTestJSON(base.BaseNetworkTest):
-
-    """
-    Tests the following operations in the Neutron API using the REST client for
-    Neutron:
+    """Tests the following operations in the Neutron API:
 
         List all available extensions
 
diff --git a/tempest/api/network/test_extra_dhcp_options.py b/tempest/api/network/test_extra_dhcp_options.py
index 7924f38..062bc69 100644
--- a/tempest/api/network/test_extra_dhcp_options.py
+++ b/tempest/api/network/test_extra_dhcp_options.py
@@ -19,9 +19,7 @@
 
 
 class ExtraDHCPOptionsTestJSON(base.BaseNetworkTest):
-    """
-    Tests the following operations with the Extra DHCP Options Neutron API
-    extension:
+    """Tests the following operations with the Extra DHCP Options:
 
         port create
         port list
diff --git a/tempest/api/network/test_floating_ips.py b/tempest/api/network/test_floating_ips.py
index b796311..ce9c4be 100644
--- a/tempest/api/network/test_floating_ips.py
+++ b/tempest/api/network/test_floating_ips.py
@@ -24,9 +24,7 @@
 
 
 class FloatingIPTestJSON(base.BaseNetworkTest):
-    """
-    Tests the following operations in the Neutron API using the REST client for
-    Neutron:
+    """Tests the following operations in the Neutron API:
 
         Create a Floating IP
         Update a Floating IP
@@ -70,11 +68,11 @@
     @test.idempotent_id('62595970-ab1c-4b7f-8fcc-fddfe55e8718')
     def test_create_list_show_update_delete_floating_ip(self):
         # Creates a floating IP
-        body = self.client.create_floatingip(
+        body = self.floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id,
             port_id=self.ports[0]['id'])
         created_floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip,
+        self.addCleanup(self.floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
         self.assertIsNotNone(created_floating_ip['id'])
         self.assertIsNotNone(created_floating_ip['tenant_id'])
@@ -85,7 +83,8 @@
         self.assertIn(created_floating_ip['fixed_ip_address'],
                       [ip['ip_address'] for ip in self.ports[0]['fixed_ips']])
         # Verifies the details of a floating_ip
-        floating_ip = self.client.show_floatingip(created_floating_ip['id'])
+        floating_ip = self.floating_ips_client.show_floatingip(
+            created_floating_ip['id'])
         shown_floating_ip = floating_ip['floatingip']
         self.assertEqual(shown_floating_ip['id'], created_floating_ip['id'])
         self.assertEqual(shown_floating_ip['floating_network_id'],
@@ -97,13 +96,13 @@
         self.assertEqual(shown_floating_ip['port_id'], self.ports[0]['id'])
 
         # Verify the floating ip exists in the list of all floating_ips
-        floating_ips = self.client.list_floatingips()
+        floating_ips = self.floating_ips_client.list_floatingips()
         floatingip_id_list = list()
         for f in floating_ips['floatingips']:
             floatingip_id_list.append(f['id'])
         self.assertIn(created_floating_ip['id'], floatingip_id_list)
         # Associate floating IP to the other port
-        floating_ip = self.client.update_floatingip(
+        floating_ip = self.floating_ips_client.update_floatingip(
             created_floating_ip['id'],
             port_id=self.ports[1]['id'])
         updated_floating_ip = floating_ip['floatingip']
@@ -113,7 +112,7 @@
         self.assertEqual(updated_floating_ip['router_id'], self.router['id'])
 
         # Disassociate floating IP from the port
-        floating_ip = self.client.update_floatingip(
+        floating_ip = self.floating_ips_client.update_floatingip(
             created_floating_ip['id'],
             port_id=None)
         updated_floating_ip = floating_ip['floatingip']
@@ -124,21 +123,22 @@
     @test.idempotent_id('e1f6bffd-442f-4668-b30e-df13f2705e77')
     def test_floating_ip_delete_port(self):
         # Create a floating IP
-        body = self.client.create_floatingip(
+        body = self.floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id)
         created_floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip,
+        self.addCleanup(self.floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
         # Create a port
         port = self.ports_client.create_port(network_id=self.network['id'])
         created_port = port['port']
-        floating_ip = self.client.update_floatingip(
+        floating_ip = self.floating_ips_client.update_floatingip(
             created_floating_ip['id'],
             port_id=created_port['id'])
         # Delete port
         self.ports_client.delete_port(created_port['id'])
         # Verifies the details of the floating_ip
-        floating_ip = self.client.show_floatingip(created_floating_ip['id'])
+        floating_ip = self.floating_ips_client.show_floatingip(
+            created_floating_ip['id'])
         shown_floating_ip = floating_ip['floatingip']
         # Confirm the fields are back to None
         self.assertEqual(shown_floating_ip['id'], created_floating_ip['id'])
@@ -149,11 +149,11 @@
     @test.idempotent_id('1bb2f731-fe5a-4b8c-8409-799ade1bed4d')
     def test_floating_ip_update_different_router(self):
         # Associate a floating IP to a port on a router
-        body = self.client.create_floatingip(
+        body = self.floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id,
             port_id=self.ports[1]['id'])
         created_floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip,
+        self.addCleanup(self.floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
         self.assertEqual(created_floating_ip['router_id'], self.router['id'])
         network2 = self.create_network()
@@ -163,7 +163,7 @@
         self.create_router_interface(router2['id'], subnet2['id'])
         port_other_router = self.create_port(network2)
         # Associate floating IP to the other port on another router
-        floating_ip = self.client.update_floatingip(
+        floating_ip = self.floating_ips_client.update_floatingip(
             created_floating_ip['id'],
             port_id=port_other_router['id'])
         updated_floating_ip = floating_ip['floatingip']
@@ -175,17 +175,17 @@
     @test.attr(type='smoke')
     @test.idempotent_id('36de4bd0-f09c-43e3-a8e1-1decc1ffd3a5')
     def test_create_floating_ip_specifying_a_fixed_ip_address(self):
-        body = self.client.create_floatingip(
+        body = self.floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id,
             port_id=self.ports[1]['id'],
             fixed_ip_address=self.ports[1]['fixed_ips'][0]['ip_address'])
         created_floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip,
+        self.addCleanup(self.floating_ips_client.delete_floatingip,
                         created_floating_ip['id'])
         self.assertIsNotNone(created_floating_ip['id'])
         self.assertEqual(created_floating_ip['fixed_ip_address'],
                          self.ports[1]['fixed_ips'][0]['ip_address'])
-        floating_ip = self.client.update_floatingip(
+        floating_ip = self.floating_ips_client.update_floatingip(
             created_floating_ip['id'],
             port_id=None)
         self.assertIsNone(floating_ip['floatingip']['port_id'])
@@ -202,18 +202,19 @@
         port = body['port']
         self.addCleanup(self.ports_client.delete_port, port['id'])
         # Create floating ip
-        body = self.client.create_floatingip(
+        body = self.floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id,
             port_id=port['id'],
             fixed_ip_address=list_ips[0])
         floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip, floating_ip['id'])
+        self.addCleanup(self.floating_ips_client.delete_floatingip,
+                        floating_ip['id'])
         self.assertIsNotNone(floating_ip['id'])
         self.assertEqual(floating_ip['fixed_ip_address'], list_ips[0])
         # Update floating ip
-        body = self.client.update_floatingip(floating_ip['id'],
-                                             port_id=port['id'],
-                                             fixed_ip_address=list_ips[1])
+        body = self.floating_ips_client.update_floatingip(
+            floating_ip['id'], port_id=port['id'],
+            fixed_ip_address=list_ips[1])
         update_floating_ip = body['floatingip']
         self.assertEqual(update_floating_ip['fixed_ip_address'],
                          list_ips[1])
diff --git a/tempest/api/network/test_floating_ips_negative.py b/tempest/api/network/test_floating_ips_negative.py
index e8624d8..f915615 100644
--- a/tempest/api/network/test_floating_ips_negative.py
+++ b/tempest/api/network/test_floating_ips_negative.py
@@ -25,8 +25,7 @@
 
 
 class FloatingIPNegativeTestJSON(base.BaseNetworkTest):
-    """
-    Test the following negative  operations for floating ips:
+    """Test the following negative operations for floating ips:
 
         Create floatingip with a port that is unreachable to external network
         Create floatingip in private network
@@ -54,17 +53,17 @@
     @test.attr(type=['negative'])
     @test.idempotent_id('22996ea8-4a81-4b27-b6e1-fa5df92fa5e8')
     def test_create_floatingip_with_port_ext_net_unreachable(self):
-        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]
-                                                    ['ip_address'])
+        self.assertRaises(
+            lib_exc.NotFound, self.floating_ips_client.create_floatingip,
+            floating_network_id=self.ext_net_id, port_id=self.port['id'],
+            fixed_ip_address=self.port['fixed_ips'][0]
+                                      ['ip_address'])
 
     @test.attr(type=['negative'])
     @test.idempotent_id('50b9aeb4-9f0b-48ee-aa31-fa955a48ff54')
     def test_create_floatingip_in_private_network(self):
         self.assertRaises(lib_exc.BadRequest,
-                          self.client.create_floatingip,
+                          self.floating_ips_client.create_floatingip,
                           floating_network_id=self.network['id'],
                           port_id=self.port['id'],
                           fixed_ip_address=self.port['fixed_ips'][0]
@@ -74,12 +73,13 @@
     @test.idempotent_id('6b3b8797-6d43-4191-985c-c48b773eb429')
     def test_associate_floatingip_port_ext_net_unreachable(self):
         # Create floating ip
-        body = self.client.create_floatingip(
+        body = self.floating_ips_client.create_floatingip(
             floating_network_id=self.ext_net_id)
         floating_ip = body['floatingip']
-        self.addCleanup(self.client.delete_floatingip, floating_ip['id'])
+        self.addCleanup(
+            self.floating_ips_client.delete_floatingip, floating_ip['id'])
         # Associate floating IP to the other port
-        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'])
+        self.assertRaises(
+            lib_exc.NotFound, self.floating_ips_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_metering_extensions.py b/tempest/api/network/test_metering_extensions.py
index ee0dcb0..a213f92 100644
--- a/tempest/api/network/test_metering_extensions.py
+++ b/tempest/api/network/test_metering_extensions.py
@@ -23,9 +23,7 @@
 
 
 class MeteringTestJSON(base.BaseAdminNetworkTest):
-    """
-    Tests the following operations in the Neutron API using the REST client for
-    Neutron:
+    """Tests the following operations in the Neutron API:
 
         List, Show, Create, Delete Metering labels
         List, Show, Create, Delete Metering labels rules
diff --git a/tempest/api/network/test_networks.py b/tempest/api/network/test_networks.py
index 5039a69..a266142 100644
--- a/tempest/api/network/test_networks.py
+++ b/tempest/api/network/test_networks.py
@@ -28,9 +28,7 @@
 
 
 class NetworksTest(base.BaseNetworkTest):
-    """
-    Tests the following operations in the Neutron API using the REST client for
-    Neutron:
+    """Tests the following operations in the Neutron API:
 
         create a network for a tenant
         list tenant's networks
@@ -95,9 +93,8 @@
 
     @classmethod
     def _create_subnet_with_last_subnet_block(cls, network, ip_version):
-        """Derive last subnet CIDR block from tenant CIDR and
-           create the subnet with that derived CIDR
-        """
+        # Derive last subnet CIDR block from tenant CIDR and
+        # create the subnet with that derived CIDR
         if ip_version == 4:
             cidr = netaddr.IPNetwork(CONF.network.tenant_network_cidr)
             mask_bits = CONF.network.tenant_network_mask_bits
@@ -133,9 +130,8 @@
         return [{'start': str(gateway + 2), 'end': str(gateway + 3)}]
 
     def subnet_dict(self, include_keys):
-        """Return a subnet dict which has include_keys and their corresponding
-           value from self._subnet_data
-        """
+        # Return a subnet dict which has include_keys and their corresponding
+        # value from self._subnet_data
         return dict((key, self._subnet_data[self._ip_version][key])
                     for key in include_keys)
 
@@ -405,9 +401,7 @@
 
 
 class BulkNetworkOpsTestJSON(base.BaseNetworkTest):
-    """
-    Tests the following operations in the Neutron API using the REST client for
-    Neutron:
+    """Tests the following operations in the Neutron API:
 
         bulk network creation
         bulk subnet creation
diff --git a/tempest/api/network/test_ports.py b/tempest/api/network/test_ports.py
index d0ed1f2..43da1c4 100644
--- a/tempest/api/network/test_ports.py
+++ b/tempest/api/network/test_ports.py
@@ -28,8 +28,7 @@
 
 
 class PortsTestJSON(sec_base.BaseSecGroupTest):
-    """
-    Test the following operations for ports:
+    """Test the following operations for ports:
 
         port create
         port delete
diff --git a/tempest/api/network/test_subnetpools_extensions.py b/tempest/api/network/test_subnetpools_extensions.py
index 09478ca..8a61ff8 100644
--- a/tempest/api/network/test_subnetpools_extensions.py
+++ b/tempest/api/network/test_subnetpools_extensions.py
@@ -22,9 +22,7 @@
 
 
 class SubnetPoolsTestJSON(base.BaseNetworkTest):
-    """
-    Tests the following operations in the subnetpools API using the REST client
-    for Neutron:
+    """Tests the following operations in the subnetpools API:
 
         Create a subnet pool.
         Update a subnet pool.
diff --git a/tempest/api/object_storage/base.py b/tempest/api/object_storage/base.py
index 41a7d65..2621581 100644
--- a/tempest/api/object_storage/base.py
+++ b/tempest/api/object_storage/base.py
@@ -90,10 +90,8 @@
                 pass
 
     def assertHeaders(self, resp, target, method):
-        """
-        Common method to check the existence and the format of common response
-        headers
-        """
+        """Check the existence and the format of response headers"""
+
         self.assertThat(resp, custom_matchers.ExistsAllResponseHeaders(
                         target, method))
         self.assertThat(resp, custom_matchers.AreAllWellFormatted())
diff --git a/tempest/api/object_storage/test_account_quotas.py b/tempest/api/object_storage/test_account_quotas.py
index 78707d8..0f6a330 100644
--- a/tempest/api/object_storage/test_account_quotas.py
+++ b/tempest/api/object_storage/test_account_quotas.py
@@ -92,8 +92,7 @@
     @test.idempotent_id('63f51f9f-5f1d-4fc6-b5be-d454d70949d6')
     @test.requires_ext(extension='account_quotas', service='object')
     def test_admin_modify_quota(self):
-        """Test that the ResellerAdmin is able to modify and remove the quota
-        on a user's account.
+        """Test ResellerAdmin can modify/remove the quota on a user's account
 
         Using the account client, the test modifies the quota
         successively to:
diff --git a/tempest/api/object_storage/test_account_quotas_negative.py b/tempest/api/object_storage/test_account_quotas_negative.py
index 2bf331a..aee17d3 100644
--- a/tempest/api/object_storage/test_account_quotas_negative.py
+++ b/tempest/api/object_storage/test_account_quotas_negative.py
@@ -83,9 +83,7 @@
     @test.idempotent_id('d1dc5076-555e-4e6d-9697-28f1fe976324')
     @test.requires_ext(extension='account_quotas', service='object')
     def test_user_modify_quota(self):
-        """Test that a user is not able to modify or remove a quota on
-        its account.
-        """
+        """Test that a user cannot modify or remove a quota on its account."""
 
         # Not able to remove quota
         self.assertRaises(lib_exc.Forbidden,
diff --git a/tempest/api/orchestration/stacks/test_neutron_resources.py b/tempest/api/orchestration/stacks/test_neutron_resources.py
index e2ac455..a614c76 100644
--- a/tempest/api/orchestration/stacks/test_neutron_resources.py
+++ b/tempest/api/orchestration/stacks/test_neutron_resources.py
@@ -45,6 +45,7 @@
         super(NeutronResourcesTestJSON, cls).setup_clients()
         cls.network_client = cls.os.network_client
         cls.subnets_client = cls.os.subnets_client
+        cls.ports_client = cls.os.ports_client
 
     @classmethod
     def resource_setup(cls):
diff --git a/tempest/api/orchestration/stacks/test_non_empty_stack.py b/tempest/api/orchestration/stacks/test_non_empty_stack.py
index e37587c..4bc2c17 100644
--- a/tempest/api/orchestration/stacks/test_non_empty_stack.py
+++ b/tempest/api/orchestration/stacks/test_non_empty_stack.py
@@ -91,8 +91,7 @@
 
     @test.idempotent_id('c951d55e-7cce-4c1f-83a0-bad735437fa6')
     def test_list_resources(self):
-        """Getting list of created resources for the stack should be possible.
-        """
+        """Get list of created resources for the stack should be possible."""
         resources = self.list_resources(self.stack_identifier)
         self.assertEqual({self.resource_name: self.resource_type}, resources)
 
diff --git a/tempest/api/telemetry/base.py b/tempest/api/telemetry/base.py
index 8f07614..81f00ec 100644
--- a/tempest/api/telemetry/base.py
+++ b/tempest/api/telemetry/base.py
@@ -112,8 +112,8 @@
         super(BaseTelemetryTest, cls).resource_cleanup()
 
     def await_samples(self, metric, query):
-        """
-        This method is to wait for sample to add it to database.
+        """This method is to wait for sample to add it to database.
+
         There are long time delays when using Postgresql (or Mysql)
         database as ceilometer backend
         """
diff --git a/tempest/api/telemetry/test_alarming_api_negative.py b/tempest/api/telemetry/test_alarming_api_negative.py
index 7d5a0bf..06753b0 100644
--- a/tempest/api/telemetry/test_alarming_api_negative.py
+++ b/tempest/api/telemetry/test_alarming_api_negative.py
@@ -21,8 +21,8 @@
 
 
 class TelemetryAlarmingNegativeTest(base.BaseTelemetryTest):
-    """here we have negative tests for show_alarm, update_alarm, show_alarm_history
-       Tests
+    """Negative tests for show_alarm, update_alarm, show_alarm_history tests
+
         ** show non-existent alarm
         ** show the deleted alarm
         ** delete deleted alarm
diff --git a/tempest/api/volume/admin/test_volume_services.py b/tempest/api/volume/admin/test_volume_services.py
index 74fffb9..6692594 100644
--- a/tempest/api/volume/admin/test_volume_services.py
+++ b/tempest/api/volume/admin/test_volume_services.py
@@ -18,8 +18,8 @@
 
 
 class VolumesServicesV2TestJSON(base.BaseVolumeAdminTest):
-    """
-    Tests Volume Services API.
+    """Tests Volume Services API.
+
     volume service list requires admin privileges.
     """
 
diff --git a/tempest/api/volume/test_availability_zone.py b/tempest/api/volume/test_availability_zone.py
index 366b8d2..fe51375 100644
--- a/tempest/api/volume/test_availability_zone.py
+++ b/tempest/api/volume/test_availability_zone.py
@@ -18,10 +18,7 @@
 
 
 class AvailabilityZoneV2TestJSON(base.BaseVolumeTest):
-
-    """
-    Tests Availability Zone V2 API List
-    """
+    """Tests Availability Zone V2 API List"""
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/api/volume/test_volumes_list.py b/tempest/api/volume/test_volumes_list.py
index 620366a..b776494 100644
--- a/tempest/api/volume/test_volumes_list.py
+++ b/tempest/api/volume/test_volumes_list.py
@@ -26,14 +26,11 @@
 
 
 class VolumesV2ListTestJSON(base.BaseVolumeTest):
-
-    """
-    This test creates a number of 1G volumes. To run successfully,
-    ensure that the backing file for the volume group that Nova uses
-    has space for at least 3 1G volumes!
-    If you are running a Devstack environment, ensure that the
-    VOLUME_BACKING_FILE_SIZE is at least 4G in your localrc
-    """
+    # NOTE: This test creates a number of 1G volumes. To run successfully,
+    # ensure that the backing file for the volume group that Nova uses
+    # has space for at least 3 1G volumes!
+    # If you are running a Devstack environment, ensure that the
+    # VOLUME_BACKING_FILE_SIZE is at least 4G in your localrc
 
     VOLUME_FIELDS = ('id', 'name')
 
@@ -83,10 +80,7 @@
         super(VolumesV2ListTestJSON, cls).resource_cleanup()
 
     def _list_by_param_value_and_assert(self, params, with_detail=False):
-        """
-        Perform list or list_details action with given params
-        and validates result.
-        """
+        """list or list_details with given params and validates result"""
         if with_detail:
             fetched_vol_list = \
                 self.client.list_volumes(detail=True, params=params)['volumes']
diff --git a/tempest/api/volume/test_volumes_snapshots.py b/tempest/api/volume/test_volumes_snapshots.py
index 9866da3..856adcc 100644
--- a/tempest/api/volume/test_volumes_snapshots.py
+++ b/tempest/api/volume/test_volumes_snapshots.py
@@ -43,10 +43,8 @@
         self.volumes_client.wait_for_volume_status(volume_id, 'available')
 
     def _list_by_param_values_and_assert(self, params, with_detail=False):
-        """
-        Perform list or list_details action with given params
-        and validates result.
-        """
+        """list or list_details with given params and validates result."""
+
         if with_detail:
             fetched_snap_list = self.snapshots_client.list_snapshots(
                 detail=True, params=params)['snapshots']
diff --git a/tempest/api/volume/v2/test_volumes_list.py b/tempest/api/volume/v2/test_volumes_list.py
index 94a9d16..6568627 100644
--- a/tempest/api/volume/v2/test_volumes_list.py
+++ b/tempest/api/volume/v2/test_volumes_list.py
@@ -21,9 +21,7 @@
 
 
 class VolumesV2ListTestJSON(base.BaseVolumeTest):
-
-    """
-    volumes v2 specific tests.
+    """volumes v2 specific tests.
 
     This test creates a number of 1G volumes. To run successfully,
     ensure that the backing file for the volume group that Nova uses
diff --git a/tempest/clients.py b/tempest/clients.py
index d34ed8c..e82a159 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -105,6 +105,7 @@
 from tempest.services.image.v2.json.image_client import ImageClientV2
 from tempest.services.messaging.json.messaging_client import \
     MessagingClient
+from tempest.services.network.json.floating_ips_client import FloatingIPsClient
 from tempest.services.network.json.network_client import NetworkClient
 from tempest.services.network.json.networks_client import NetworksClient
 from tempest.services.network.json.ports_client import PortsClient
@@ -155,10 +156,7 @@
 
 
 class Manager(manager.Manager):
-
-    """
-    Top level manager for OpenStack tempest clients
-    """
+    """Top level manager for OpenStack tempest clients"""
 
     default_params = {
         'disable_ssl_certificate_validation':
@@ -222,6 +220,14 @@
             build_interval=CONF.network.build_interval,
             build_timeout=CONF.network.build_timeout,
             **self.default_params)
+        self.floating_ips_client = FloatingIPsClient(
+            self.auth_provider,
+            CONF.network.catalog_type,
+            CONF.network.region or CONF.identity.region,
+            endpoint_type=CONF.network.endpoint_type,
+            build_interval=CONF.network.build_interval,
+            build_timeout=CONF.network.build_timeout,
+            **self.default_params)
         self.messaging_client = MessagingClient(
             self.auth_provider,
             CONF.messaging.catalog_type,
diff --git a/tempest/cmd/account_generator.py b/tempest/cmd/account_generator.py
index a90b0ce..c23b668 100755
--- a/tempest/cmd/account_generator.py
+++ b/tempest/cmd/account_generator.py
@@ -89,6 +89,7 @@
 from oslo_log import log as logging
 import yaml
 
+from tempest.common import identity
 from tempest import config
 from tempest import exceptions as exc
 from tempest.services.identity.v2.json import identity_client
@@ -188,7 +189,7 @@
     LOG.info('Tenants created')
     for u in resources['users']:
         try:
-            tenant = identity_admin.get_tenant_by_name(u['tenant'])
+            tenant = identity.get_tenant_by_name(identity_admin, u['tenant'])
         except tempest_lib.exceptions.NotFound:
             LOG.error("Tenant: %s - not found" % u['tenant'])
             continue
@@ -209,7 +210,7 @@
     LOG.info('Users created')
     if neutron_iso_networks:
         for u in resources['users']:
-            tenant = identity_admin.get_tenant_by_name(u['tenant'])
+            tenant = identity.get_tenant_by_name(identity_admin, u['tenant'])
             network_name, router_name = create_network_resources(
                 network_admin, networks_admin, subnets_admin, tenant['id'],
                 u['name'])
@@ -218,7 +219,7 @@
         LOG.info('Networks created')
     for u in resources['users']:
         try:
-            tenant = identity_admin.get_tenant_by_name(u['tenant'])
+            tenant = identity.get_tenant_by_name(identity_admin, u['tenant'])
         except tempest_lib.exceptions.NotFound:
             LOG.error("Tenant: %s - not found" % u['tenant'])
             continue
diff --git a/tempest/cmd/cleanup.py b/tempest/cmd/cleanup.py
index 239b4e9..09e3c9d 100644
--- a/tempest/cmd/cleanup.py
+++ b/tempest/cmd/cleanup.py
@@ -59,6 +59,7 @@
 from tempest import clients
 from tempest.cmd import cleanup_service
 from tempest.common import credentials_factory as credentials
+from tempest.common import identity
 from tempest import config
 
 SAVED_STATE_JSON = "saved_state.json"
@@ -177,7 +178,8 @@
     def _init_admin_ids(self):
         id_cl = self.admin_mgr.identity_client
 
-        tenant = id_cl.get_tenant_by_name(CONF.auth.admin_tenant_name)
+        tenant = identity.get_tenant_by_name(id_cl,
+                                             CONF.auth.admin_tenant_name)
         self.admin_tenant_id = tenant['id']
 
         user = id_cl.get_user_by_username(self.admin_tenant_id,
diff --git a/tempest/cmd/cleanup_service.py b/tempest/cmd/cleanup_service.py
index d2f6c03..ba6bf6c 100644
--- a/tempest/cmd/cleanup_service.py
+++ b/tempest/cmd/cleanup_service.py
@@ -17,6 +17,7 @@
 from oslo_log import log as logging
 
 from tempest.common import credentials_factory as credentials
+from tempest.common import identity
 from tempest import config
 from tempest import test
 
@@ -87,7 +88,7 @@
     id_cl = am.identity_client
 
     networks = net_cl.list_networks()
-    tenant = id_cl.get_tenant_by_name(tenant_name)
+    tenant = identity.get_tenant_by_name(id_cl, tenant_name)
     t_id = tenant['id']
     n_id = None
     for net in networks['networks']:
@@ -385,6 +386,7 @@
         self.networks_client = manager.networks_client
         self.subnets_client = manager.subnets_client
         self.ports_client = manager.ports_client
+        self.floating_ips_client = manager.floating_ips_client
 
     def _filter_by_conf_networks(self, item_list):
         if not item_list or not all(('network_id' in i for i in item_list)):
@@ -421,7 +423,7 @@
 class NetworkFloatingIpService(NetworkService):
 
     def list(self):
-        client = self.client
+        client = self.floating_ips_client
         flips = client.list_floatingips(**self.tenant_filter)
         flips = flips['floatingips']
         LOG.debug("List count, %s Network Floating IPs" % len(flips))
diff --git a/tempest/cmd/init.py b/tempest/cmd/init.py
index a4ed064..ac67ce4 100644
--- a/tempest/cmd/init.py
+++ b/tempest/cmd/init.py
@@ -35,7 +35,9 @@
 
 
 def get_tempest_default_config_dir():
-    """Returns the correct default config dir to support both cases of
+    """Get default config directory of tempest
+
+    Returns the correct default config dir to support both cases of
     tempest being or not installed in a virtualenv.
     Cases considered:
     - no virtual env, python2: real_prefix and base_prefix not set
diff --git a/tempest/cmd/javelin.py b/tempest/cmd/javelin.py
index 97d431a..c2feb23 100755
--- a/tempest/cmd/javelin.py
+++ b/tempest/cmd/javelin.py
@@ -120,6 +120,7 @@
 from tempest_lib.services.compute import flavors_client
 import yaml
 
+from tempest.common import identity
 from tempest.common import waiters
 from tempest import config
 from tempest.services.compute.json import floating_ips_client
@@ -295,7 +296,7 @@
 def destroy_tenants(tenants):
     admin = keystone_admin()
     for tenant in tenants:
-        tenant_id = admin.identity.get_tenant_by_name(tenant)['id']
+        tenant_id = identity.get_tenant_by_name(admin.identity, tenant)['id']
         admin.identity.delete_tenant(tenant_id)
 
 ##############
@@ -347,7 +348,7 @@
     admin = keystone_admin()
     for u in users:
         try:
-            tenant = admin.identity.get_tenant_by_name(u['tenant'])
+            tenant = identity.get_tenant_by_name(admin.identity, u['tenant'])
         except lib_exc.NotFound:
             LOG.error("Tenant: %s - not found" % u['tenant'])
             continue
@@ -365,7 +366,8 @@
 def destroy_users(users):
     admin = keystone_admin()
     for user in users:
-        tenant_id = admin.identity.get_tenant_by_name(user['tenant'])['id']
+        tenant_id = identity.get_tenant_by_name(admin.identity,
+                                                user['tenant'])['id']
         user_id = admin.identity.get_user_by_username(tenant_id,
                                                       user['name'])['id']
         admin.identity.delete_user(user_id)
@@ -376,7 +378,7 @@
     LOG.info("Collecting users")
     admin = keystone_admin()
     for u in users:
-        tenant = admin.identity.get_tenant_by_name(u['tenant'])
+        tenant = identity.get_tenant_by_name(admin.identity, u['tenant'])
         u['tenant_id'] = tenant['id']
         USERS[u['name']] = u
         body = admin.identity.get_user_by_username(tenant['id'], u['name'])
diff --git a/tempest/cmd/run_stress.py b/tempest/cmd/run_stress.py
index 0448589..80f1b85 100755
--- a/tempest/cmd/run_stress.py
+++ b/tempest/cmd/run_stress.py
@@ -33,8 +33,7 @@
 
 
 def discover_stress_tests(path="./", filter_attr=None, call_inherited=False):
-    """Discovers all tempest tests and create action out of them
-    """
+    """Discovers all tempest tests and create action out of them"""
     LOG.info("Start test discovery")
     tests = []
     testloader = loader.TestLoader()
diff --git a/tempest/common/cred_client.py b/tempest/common/cred_client.py
index 79a502a..13baafb 100644
--- a/tempest/common/cred_client.py
+++ b/tempest/common/cred_client.py
@@ -24,10 +24,11 @@
 
 @six.add_metaclass(abc.ABCMeta)
 class CredsClient(object):
-    """This class is a wrapper around the identity clients, to provide a
-     single interface for managing credentials in both v2 and v3 cases.
-     It's not bound to created credentials, only to a specific set of admin
-     credentials used for generating credentials.
+    """This class is a wrapper around the identity clients
+
+     to provide a single interface for managing credentials in both v2 and v3
+     cases. It's not bound to created credentials, only to a specific set of
+     admin credentials used for generating credentials.
     """
 
     def __init__(self, identity_client):
diff --git a/tempest/common/cred_provider.py b/tempest/common/cred_provider.py
index e5f24b3..aa237e0 100644
--- a/tempest/common/cred_provider.py
+++ b/tempest/common/cred_provider.py
@@ -28,6 +28,7 @@
     def __init__(self, identity_version, name=None, network_resources=None,
                  credentials_domain=None, admin_role=None):
         """A CredentialProvider supplies credentials to test classes.
+
         :param identity_version: Identity version of the credentials provided
         :param name: Name of the calling test. Included in provisioned
                      credentials when credentials are provisioned on the fly
diff --git a/tempest/common/credentials_factory.py b/tempest/common/credentials_factory.py
index 486b7fd..38bde2e 100644
--- a/tempest/common/credentials_factory.py
+++ b/tempest/common/credentials_factory.py
@@ -118,11 +118,11 @@
         raise exceptions.InvalidConfiguration(msg)
 
     def is_role_available(self, role):
-        msg = "Credentials being specified through the config file can not be"\
-              " used with tests that specify using credentials by roles. "\
-              "Either exclude/skip the tests doing this or use either an "\
-              "test_accounts_file or dynamic credentials."
-        raise exceptions.InvalidConfiguration(msg)
+        # NOTE(andreaf) LegacyCredentialProvider does not support credentials
+        # by role, so returning always False.
+        # Test that rely on credentials by role should use this to skip
+        # when this is credential provider is used
+        return False
 
 
 # Return the right implementation of CredentialProvider based on config
@@ -292,10 +292,7 @@
 
 
 class ConfiguredUserManager(clients.Manager):
-    """
-    Manager object that uses the `user` credentials for its
-    managed client objects
-    """
+    """Manager that uses user credentials for its managed client objects"""
 
     def __init__(self, service=None):
         super(ConfiguredUserManager, self).__init__(
@@ -304,11 +301,7 @@
 
 
 class AdminManager(clients.Manager):
-
-    """
-    Manager object that uses the admin credentials for its
-    managed client objects
-    """
+    """Manager that uses admin credentials for its managed client objects"""
 
     def __init__(self, service=None):
         super(AdminManager, self).__init__(
diff --git a/tempest/common/custom_matchers.py b/tempest/common/custom_matchers.py
index 839088c..8ba33ed 100644
--- a/tempest/common/custom_matchers.py
+++ b/tempest/common/custom_matchers.py
@@ -19,8 +19,7 @@
 
 
 class ExistsAllResponseHeaders(object):
-    """
-    Specific matcher to check the existence of Swift's response headers
+    """Specific matcher to check the existence of Swift's response headers
 
     This matcher checks the existence of common headers for each HTTP method
     or the target, which means account, container or object.
@@ -30,7 +29,8 @@
     """
 
     def __init__(self, target, method):
-        """
+        """Initialization of ExistsAllResponseHeaders
+
         param: target Account/Container/Object
         param: method PUT/GET/HEAD/DELETE/COPY/POST
         """
@@ -38,7 +38,8 @@
         self.method = method
 
     def match(self, actual):
-        """
+        """Check headers
+
         param: actual HTTP response headers
         """
         # Check common headers for all HTTP methods
@@ -95,10 +96,7 @@
 
 
 class NonExistentHeader(object):
-    """
-    Informs an error message for end users in the case of missing a
-    certain header in Swift's responses
-    """
+    """Informs an error message in the case of missing a certain header"""
 
     def __init__(self, header):
         self.header = header
@@ -111,9 +109,7 @@
 
 
 class AreAllWellFormatted(object):
-    """
-    Specific matcher to check the correctness of formats of values of Swift's
-    response headers
+    """Specific matcher to check the correctness of formats of values
 
     This matcher checks the format of values of response headers.
     When checking the format of values of 'specific' headers such as
@@ -149,10 +145,7 @@
 
 
 class InvalidFormat(object):
-    """
-    Informs an error message for end users if a format of a certain header
-    is invalid
-    """
+    """Informs an error message if a format of a certain header is invalid"""
 
     def __init__(self, key, value):
         self.key = key
@@ -166,8 +159,9 @@
 
 
 class MatchesDictExceptForKeys(object):
-    """Matches two dictionaries. Verifies all items are equals except for those
-    identified by a list of keys.
+    """Matches two dictionaries.
+
+    Verifies all items are equals except for those identified by a list of keys
     """
 
     def __init__(self, expected, excluded_keys=None):
diff --git a/tempest/common/dynamic_creds.py b/tempest/common/dynamic_creds.py
index ae53543..e950c3e 100644
--- a/tempest/common/dynamic_creds.py
+++ b/tempest/common/dynamic_creds.py
@@ -72,9 +72,9 @@
             self.identity_admin_client, self.creds_domain_name)
 
     def _get_admin_clients(self):
-        """
-        Returns a tuple with instances of the following admin clients (in this
-        order):
+        """Returns a tuple with instances of the following admin clients
+
+        (in this order):
             identity
             network
         """
diff --git a/tempest/common/generator/base_generator.py b/tempest/common/generator/base_generator.py
index 3e09300..a66002f 100644
--- a/tempest/common/generator/base_generator.py
+++ b/tempest/common/generator/base_generator.py
@@ -41,9 +41,7 @@
 
 
 def simple_generator(fn):
-    """
-    Decorator for simple generators that return one value
-    """
+    """Decorator for simple generators that return one value"""
     @functools.wraps(fn)
     def wrapped(self, schema):
         result = fn(self, schema)
@@ -110,9 +108,7 @@
         jsonschema.validate(schema, self.schema)
 
     def generate_scenarios(self, schema, path=None):
-        """
-        Generates the scenario (all possible test cases) out of the given
-        schema.
+        """Generate scenario (all possible test cases) out of the given schema
 
         :param schema: a dict style schema (see ``BasicGeneratorSet.schema``)
         :param path: the schema path if the given schema is a subschema
@@ -157,9 +153,10 @@
         return scenarios
 
     def generate_payload(self, test, schema):
-        """
-        Generates one jsonschema out of the given test. It's mandatory to use
-        generate_scenarios before to register all needed variables to the test.
+        """Generates one jsonschema out of the given test.
+
+        It's mandatory to use generate_scenarios before to register all needed
+        variables to the test.
 
         :param test: A test object (scenario) with all _negtest variables on it
         :param schema: schema for the test
diff --git a/tempest/common/glance_http.py b/tempest/common/glance_http.py
index 868a3e9..e5431a0 100644
--- a/tempest/common/glance_http.py
+++ b/tempest/common/glance_http.py
@@ -203,8 +203,7 @@
 
 
 class OpenSSLConnectionDelegator(object):
-    """
-    An OpenSSL.SSL.Connection delegator.
+    """An OpenSSL.SSL.Connection delegator.
 
     Supplies an additional 'makefile' method which httplib requires
     and is not present in OpenSSL.SSL.Connection.
@@ -225,9 +224,8 @@
 
 
 class VerifiedHTTPSConnection(httplib.HTTPSConnection):
-    """
-    Extended HTTPSConnection which uses the OpenSSL library
-    for enhanced SSL support.
+    """Extended HTTPSConnection which uses OpenSSL library for enhanced SSL
+
     Note: Much of this functionality can eventually be replaced
           with native Python 3.3 code.
     """
@@ -247,11 +245,10 @@
 
     @staticmethod
     def host_matches_cert(host, x509):
-        """
-        Verify that the the x509 certificate we have received
-        from 'host' correctly identifies the server we are
-        connecting to, ie that the certificate's Common Name
-        or a Subject Alternative Name matches 'host'.
+        """Verify that the x509 certificate we have received from 'host'
+
+        Identifies the server we are connecting to, ie that the certificate's
+        Common Name or a Subject Alternative Name matches 'host'.
         """
         # First see if we can match the CN
         if x509.get_subject().commonName == host:
@@ -289,9 +286,7 @@
             return preverify_ok
 
     def setcontext(self):
-        """
-        Set up the OpenSSL context.
-        """
+        """Set up the OpenSSL context."""
         self.context = OpenSSL.SSL.Context(OpenSSL.SSL.SSLv23_METHOD)
 
         if self.ssl_compression is False:
@@ -336,10 +331,7 @@
             self.context.set_default_verify_paths()
 
     def connect(self):
-        """
-        Connect to an SSL port using the OpenSSL library and apply
-        per-connection parameters.
-        """
+        """Connect to SSL port and apply per-connection parameters."""
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         if self.timeout is not None:
             # '0' microseconds
diff --git a/tempest/common/identity.py b/tempest/common/identity.py
new file mode 100644
index 0000000..303f620
--- /dev/null
+++ b/tempest/common/identity.py
@@ -0,0 +1,24 @@
+# Copyright 2015 NEC Corporation
+# 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 exceptions as lib_exc
+
+
+def get_tenant_by_name(client, tenant_name):
+    tenants = client.list_tenants()['tenants']
+    for tenant in tenants:
+        if tenant['name'] == tenant_name:
+            return tenant
+    raise lib_exc.NotFound('No such tenant(%s) in %s' % (tenant_name, tenants))
diff --git a/tempest/common/negative_rest_client.py b/tempest/common/negative_rest_client.py
index abd8b31..d97411c 100644
--- a/tempest/common/negative_rest_client.py
+++ b/tempest/common/negative_rest_client.py
@@ -22,9 +22,7 @@
 
 
 class NegativeRestClient(service_client.ServiceClient):
-    """
-    Version of RestClient that does not raise exceptions.
-    """
+    """Version of RestClient that does not raise exceptions."""
     def __init__(self, auth_provider, service,
                  build_interval=None, build_timeout=None,
                  disable_ssl_certificate_validation=None,
@@ -43,9 +41,7 @@
             trace_requests=trace_requests)
 
     def _get_region_and_endpoint_type(self, service):
-        """
-        Returns the region for a specific service
-        """
+        """Returns the region for a specific service"""
         service_region = None
         service_endpoint_type = None
         for cfgname in dir(CONF._config):
diff --git a/tempest/common/service_client.py b/tempest/common/service_client.py
index 87e925d..b3a5a09 100644
--- a/tempest/common/service_client.py
+++ b/tempest/common/service_client.py
@@ -57,8 +57,7 @@
 
 
 class ResponseBodyData(object):
-    """Class that wraps an http response and string data into a single value.
-    """
+    """Class that wraps an http response and string data into a single value"""
 
     def __init__(self, response, data):
         self.response = response
diff --git a/tempest/common/utils/linux/remote_client.py b/tempest/common/utils/linux/remote_client.py
index 3bead88..10654ff 100644
--- a/tempest/common/utils/linux/remote_client.py
+++ b/tempest/common/utils/linux/remote_client.py
@@ -57,6 +57,7 @@
 
     def validate_authentication(self):
         """Validate ssh connection and authentication
+
            This method raises an Exception when the validation fails.
         """
         self.ssh_client.test_connection_auth()
diff --git a/tempest/exceptions.py b/tempest/exceptions.py
index b3d60f6..c23e70c 100644
--- a/tempest/exceptions.py
+++ b/tempest/exceptions.py
@@ -17,8 +17,7 @@
 
 
 class TempestException(Exception):
-    """
-    Base Tempest Exception
+    """Base Tempest Exception
 
     To correctly use this class, inherit from it and define
     a 'message' property. That message will get printf'd
diff --git a/tempest/manager.py b/tempest/manager.py
index b0541e8..9904aa6 100644
--- a/tempest/manager.py
+++ b/tempest/manager.py
@@ -23,16 +23,15 @@
 
 
 class Manager(object):
-
-    """
-    Base manager class
+    """Base manager class
 
     Manager objects are responsible for providing a configuration object
     and a client object for a test case to use in performing actions.
     """
 
     def __init__(self, credentials):
-        """
+        """Initialization of base manager class
+
         Credentials to be used within the various client classes managed by the
         Manager object must be defined.
 
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index 9f283c5..147c0ba 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -65,6 +65,7 @@
         cls.networks_client = cls.manager.networks_client
         cls.ports_client = cls.manager.ports_client
         cls.subnets_client = cls.manager.subnets_client
+        cls.floating_ips_client = cls.manager.floating_ips_client
         # Heat client
         cls.orchestration_client = cls.manager.orchestration_client
 
@@ -786,7 +787,7 @@
         if not external_network_id:
             external_network_id = CONF.network.public_network_id
         if not client:
-            client = self.network_client
+            client = self.floating_ips_client
         if not port_id:
             port_id, ip4 = self._get_server_port_id_and_ip4(thing)
         else:
diff --git a/tempest/scenario/test_baremetal_basic_ops.py b/tempest/scenario/test_baremetal_basic_ops.py
index fa05577..e629f0a 100644
--- a/tempest/scenario/test_baremetal_basic_ops.py
+++ b/tempest/scenario/test_baremetal_basic_ops.py
@@ -63,15 +63,6 @@
             server_id=self.instance['id'],
             status='ACTIVE')
 
-    def create_remote_file(self, client, filename):
-        """Create a file on the remote client connection.
-
-        After creating the file, force a filesystem sync. Otherwise,
-        if we issue a rebuild too quickly, the file may not exist.
-        """
-        client.exec_command('sudo touch ' + filename)
-        client.exec_command('sync')
-
     def verify_partition(self, client, label, mount, gib_size):
         """Verify a labeled partition's mount point and size."""
         LOG.info("Looking for partition %s mounted on %s" % (label, mount))
@@ -118,7 +109,6 @@
     @test.idempotent_id('549173a5-38ec-42bb-b0e2-c8b9f4a08943')
     @test.services('baremetal', 'compute', 'image', 'network')
     def test_baremetal_server_ops(self):
-        test_filename = '/mnt/rebuild_test.txt'
         self.add_keypair()
         self.boot_instance()
         self.validate_ports()
@@ -132,12 +122,13 @@
         # We expect the ephemeral partition to be mounted on /mnt and to have
         # the same size as our flavor definition.
         eph_size = self.get_flavor_ephemeral_size()
-        if eph_size > 0:
+        if eph_size:
             preserve_ephemeral = True
 
             self.verify_partition(vm_client, 'ephemeral0', '/mnt', eph_size)
             # Create the test file
-            self.create_remote_file(vm_client, test_filename)
+            timestamp = self.create_timestamp(
+                floating_ip, private_key=self.keypair['private_key'])
         else:
             preserve_ephemeral = False
 
@@ -146,9 +137,9 @@
         self.verify_connectivity()
 
         # Check that we maintained our data
-        if eph_size > 0:
-            vm_client = self.get_remote_client(self.instance)
+        if eph_size:
             self.verify_partition(vm_client, 'ephemeral0', '/mnt', eph_size)
-            vm_client.exec_command('ls ' + test_filename)
-
+            timestamp2 = self.get_timestamp(
+                floating_ip, private_key=self.keypair['private_key'])
+            self.assertEqual(timestamp, timestamp2)
         self.terminate_instance()
diff --git a/tempest/scenario/test_minimum_basic.py b/tempest/scenario/test_minimum_basic.py
index c3f3c78..a5b5a1b 100644
--- a/tempest/scenario/test_minimum_basic.py
+++ b/tempest/scenario/test_minimum_basic.py
@@ -37,6 +37,18 @@
     * with and without optional parameters
     * check command outputs
 
+    Steps:
+    1. Create image
+    2. Create keypair
+    3. Boot instance with keypair and get list of instances
+    4. Create volume and show list of volumes
+    5. Attach volume to instance and getlist of volumes
+    6. Add IP to instance
+    7. Create and add security group to instance
+    8. Check SSH connection to instance
+    9. Reboot instance
+    10. Check SSH connection to instance after reboot
+
     """
 
     def _wait_for_server_status(self, server, status):
@@ -130,10 +142,15 @@
         floating_ip = self.create_floating_ip(server)
         self.create_and_add_security_group_to_server(server)
 
+        # check that we can SSH to the server before reboot
         self.linux_client = self.get_remote_client(
             floating_ip['ip'], private_key=keypair['private_key'])
+
         self.nova_reboot(server)
 
+        # check that we can SSH to the server after reboot
+        # (both connections are part of the scenario)
         self.linux_client = self.get_remote_client(
             floating_ip['ip'], private_key=keypair['private_key'])
+
         self.check_partitions()
diff --git a/tempest/scenario/test_network_advanced_server_ops.py b/tempest/scenario/test_network_advanced_server_ops.py
index 704342f..3689508 100644
--- a/tempest/scenario/test_network_advanced_server_ops.py
+++ b/tempest/scenario/test_network_advanced_server_ops.py
@@ -27,10 +27,7 @@
 
 
 class TestNetworkAdvancedServerOps(manager.NetworkScenarioTest):
-
-    """
-    This test case checks VM connectivity after some advanced
-    instance operations executed:
+    """Check VM connectivity after some advanced instance operations executed:
 
      * Stop/Start an instance
      * Reboot an instance
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index dc5ca08..8fefd9e 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -36,7 +36,8 @@
 
 class TestNetworkBasicOps(manager.NetworkScenarioTest):
 
-    """
+    """The test suite of network basic operations
+
     This smoke test suite assumes that Nova has been configured to
     boot VM's with Neutron-managed networking, and attempts to
     verify network connectivity as follows:
@@ -123,9 +124,9 @@
         self.floating_ip_tuple = Floating_IP_tuple(floating_ip, server)
 
     def check_networks(self):
-        """
-        Checks that we see the newly created network/subnet/router via
-        checking the result of list_[networks,routers,subnets]
+        """Checks that we see the newly created network/subnet/router
+
+        via checking the result of list_[networks,routers,subnets]
         """
 
         seen_nets = self._list_networks()
@@ -182,7 +183,8 @@
     def check_public_network_connectivity(
             self, should_connect=True, msg=None,
             should_check_floating_ip_status=True):
-        """Verifies connectivty to a VM via public network and floating IP,
+        """Verifies connectivty to a VM via public network and floating IP
+
         and verifies floating IP has resource status is correct.
 
         :param should_connect: bool. determines if connectivity check is
@@ -294,8 +296,8 @@
 
     def _check_network_internal_connectivity(self, network,
                                              should_connect=True):
-        """
-        via ssh check VM internal connectivity:
+        """via ssh check VM internal connectivity:
+
         - ping internal gateway and DHCP port, implying in-tenant connectivity
         pinging both, because L3 and DHCP agents might be on different nodes
         """
@@ -312,10 +314,7 @@
                                         should_connect)
 
     def _check_network_external_connectivity(self):
-        """
-        ping public network default gateway to imply external connectivity
-
-        """
+        """ping default gateway to imply external connectivity"""
         if not CONF.network.public_network_id:
             msg = 'public network not defined.'
             LOG.info(msg)
@@ -359,7 +358,8 @@
     @test.idempotent_id('f323b3ba-82f8-4db7-8ea6-6a895869ec49')
     @test.services('compute', 'network')
     def test_network_basic_ops(self):
-        """
+        """Basic network operation test
+
         For a freshly-booted VM with an IP address ("port") on a given
             network:
 
@@ -412,7 +412,8 @@
                       'Baremetal relies on a shared physical network.')
     @test.services('compute', 'network')
     def test_connectivity_between_vms_on_different_networks(self):
-        """
+        """Test connectivity between VMs on different networks
+
         For a freshly-booted VM with an IP address ("port") on a given
             network:
 
@@ -460,7 +461,8 @@
                       'vnic_type direct or macvtap')
     @test.services('compute', 'network')
     def test_hotplug_nic(self):
-        """
+        """Test hotplug network interface
+
         1. create a new network, with no gateway (to prevent overwriting VM's
             gateway)
         2. connect VM to new network
@@ -480,7 +482,8 @@
                       'network')
     @test.services('compute', 'network')
     def test_update_router_admin_state(self):
-        """
+        """Test to update admin state up of router
+
         1. Check public connectivity before updating
                 admin_state_up attribute of router to False
         2. Check public connectivity after updating
@@ -512,8 +515,9 @@
                           "DHCP client is not available.")
     @test.services('compute', 'network')
     def test_subnet_details(self):
-        """Tests that subnet's extra configuration details are affecting
-        the VMs. This test relies on non-shared, isolated tenant networks.
+        """Tests that subnet's extra configuration details are affecting VMs.
+
+         This test relies on non-shared, isolated tenant networks.
 
          NOTE: Neutron subnets push data to servers via dhcp-agent, so any
          update in subnet requires server to actively renew its DHCP lease.
@@ -567,12 +571,11 @@
                          "Failed to update subnet's nameservers")
 
         def check_new_dns_server():
-            """Server needs to renew its dhcp lease in order to get the new dns
-            definitions from subnet
-            NOTE(amuller): we are renewing the lease as part of the retry
-            because Neutron updates dnsmasq asynchronously after the
-            subnet-update API call returns.
-            """
+            # NOTE: Server needs to renew its dhcp lease in order to get new
+            # definitions from subnet
+            # NOTE(amuller): we are renewing the lease as part of the retry
+            # because Neutron updates dnsmasq asynchronously after the
+            # subnet-update API call returns.
             ssh_client.renew_lease(fixed_ip=floating_ip['fixed_ip_address'])
             if ssh_client.get_dns_servers() != [alt_dns_server]:
                 LOG.debug("Failed to update DNS nameservers")
@@ -594,7 +597,8 @@
                           "by the test environment")
     @test.services('compute', 'network')
     def test_update_instance_port_admin_state(self):
-        """
+        """Test to update admin_state_up attribute of instance port
+
         1. Check public connectivity before updating
                 admin_state_up attribute of instance port to False
         2. Check public connectivity after updating
@@ -625,8 +629,10 @@
                           'supported in the version of Nova being tested.')
     @test.services('compute', 'network')
     def test_preserve_preexisting_port(self):
-        """Tests that a pre-existing port provided on server boot is not
-        deleted if the server is deleted.
+        """Test preserve pre-existing port
+
+        Tests that a pre-existing port provided on server boot is not deleted
+        if the server is deleted.
 
         Nova should unbind the port from the instance on delete if the port was
         not created by Nova as part of the boot request.
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 29e393f..6a23c4b 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -97,6 +97,7 @@
 
     class TenantProperties(object):
         """helper class to save tenant details
+
             id
             credentials
             network
@@ -282,7 +283,7 @@
         public_network_id = CONF.network.public_network_id
         floating_ip = self.create_floating_ip(
             server, public_network_id,
-            client=tenant.manager.network_client)
+            client=tenant.manager.floating_ips_client)
         self.floating_ips.setdefault(server['id'], floating_ip)
 
     def _create_tenant_network(self, tenant):
@@ -298,6 +299,7 @@
 
     def _deploy_tenant(self, tenant_or_id):
         """creates:
+
             network
             subnet
             router (if public not defined)
@@ -374,8 +376,8 @@
                                  should_succeed=False)
 
     def _test_cross_tenant_allow(self, source_tenant, dest_tenant):
-        """
-        check for each direction:
+        """check for each direction:
+
         creating rule for tenant incoming traffic enables only 1way traffic
         """
         ruleset = dict(
@@ -408,10 +410,8 @@
         self._check_connectivity(access_point_ssh_2, ip)
 
     def _verify_mac_addr(self, tenant):
-        """
-        verify that VM (tenant's access point) has the same ip,mac as listed in
-        port list
-        """
+        """Verify that VM has the same ip, mac as listed in port"""
+
         access_point_ssh = self._connect_to_access_point(tenant)
         mac_addr = access_point_ssh.get_mac_address()
         mac_addr = mac_addr.strip().lower()
@@ -466,9 +466,9 @@
     @test.idempotent_id('f4d556d7-1526-42ad-bafb-6bebf48568f6')
     @test.services('compute', 'network')
     def test_port_update_new_security_group(self):
-        """
-        This test verifies the traffic after updating the vm port with new
-        security group having appropriate rule.
+        """Verifies the traffic after updating the vm port
+
+        With new security group having appropriate rule.
         """
         new_tenant = self.primary_tenant
 
@@ -517,8 +517,8 @@
     @test.idempotent_id('d2f77418-fcc4-439d-b935-72eca704e293')
     @test.services('compute', 'network')
     def test_multiple_security_groups(self):
-        """
-        This test verifies multiple security groups and checks that rules
+        """Verify multiple security groups and checks that rules
+
         provided in the both the groups is applied onto VM
         """
         tenant = self.primary_tenant
@@ -536,13 +536,11 @@
             secgroup=tenant.security_groups['default'],
             **ruleset
         )
-        """
-        Vm now has 2 security groups one with ssh rule(
-        already added in setUp() method),and other with icmp rule
-        (added in the above step).The check_vm_connectivity tests
-        -that vm ping test is successful
-        -ssh to vm is successful
-        """
+        # NOTE: Vm now has 2 security groups one with ssh rule(
+        # already added in setUp() method),and other with icmp rule
+        # (added in the above step).The check_vm_connectivity tests
+        # -that vm ping test is successful
+        # -ssh to vm is successful
         self.check_vm_connectivity(ip,
                                    username=ssh_login,
                                    private_key=private_key,
@@ -552,10 +550,7 @@
     @test.idempotent_id('7c811dcc-263b-49a3-92d2-1b4d8405f50c')
     @test.services('compute', 'network')
     def test_port_security_disable_security_group(self):
-        """
-        This test verifies port_security_enabled=False disables
-        the default security group rules.
-        """
+        """Verify the default security group rules is disabled."""
         new_tenant = self.primary_tenant
 
         # Create server
diff --git a/tempest/services/compute/json/quota_classes_client.py b/tempest/services/compute/json/quota_classes_client.py
index d55c3f1..7aac5e4 100644
--- a/tempest/services/compute/json/quota_classes_client.py
+++ b/tempest/services/compute/json/quota_classes_client.py
@@ -32,9 +32,7 @@
         return service_client.ResponseBody(resp, body)
 
     def update_quota_class_set(self, quota_class_id, **kwargs):
-        """
-        Updates the quota class's limits for one or more resources.
-        """
+        """Updates the quota class's limits for one or more resources."""
         post_body = json.dumps({'quota_class_set': kwargs})
 
         resp, body = self.put('os-quota-class-sets/%s' % quota_class_id,
diff --git a/tempest/services/compute/json/quotas_client.py b/tempest/services/compute/json/quotas_client.py
index 4a1b909..e628b3a 100644
--- a/tempest/services/compute/json/quotas_client.py
+++ b/tempest/services/compute/json/quotas_client.py
@@ -42,9 +42,7 @@
         return service_client.ResponseBody(resp, body)
 
     def update_quota_set(self, tenant_id, user_id=None, **kwargs):
-        """
-        Updates the tenant's quota limits for one or more resources
-        """
+        """Updates the tenant's quota limits for one or more resources"""
         post_body = json.dumps({'quota_set': kwargs})
 
         if user_id:
diff --git a/tempest/services/compute/json/security_group_default_rules_client.py b/tempest/services/compute/json/security_group_default_rules_client.py
index 6e4d1e4..b31baab 100644
--- a/tempest/services/compute/json/security_group_default_rules_client.py
+++ b/tempest/services/compute/json/security_group_default_rules_client.py
@@ -23,8 +23,8 @@
 class SecurityGroupDefaultRulesClient(service_client.ServiceClient):
 
     def create_security_default_group_rule(self, **kwargs):
-        """
-        Creating security group default rules.
+        """Creating security group default rules.
+
         ip_protocol : ip_protocol (icmp, tcp, udp).
         from_port: Port at start of range.
         to_port  : Port at end of range.
diff --git a/tempest/services/compute/json/security_group_rules_client.py b/tempest/services/compute/json/security_group_rules_client.py
index 9626f60..314b1ed 100644
--- a/tempest/services/compute/json/security_group_rules_client.py
+++ b/tempest/services/compute/json/security_group_rules_client.py
@@ -22,8 +22,8 @@
 class SecurityGroupRulesClient(service_client.ServiceClient):
 
     def create_security_group_rule(self, **kwargs):
-        """
-        Creating a new security group rules.
+        """Creating a new security group rules.
+
         parent_group_id :ID of Security group
         ip_protocol : ip_proto (icmp, tcp, udp).
         from_port: Port at start of range.
diff --git a/tempest/services/compute/json/security_groups_client.py b/tempest/services/compute/json/security_groups_client.py
index 083d03a..c996079 100644
--- a/tempest/services/compute/json/security_groups_client.py
+++ b/tempest/services/compute/json/security_groups_client.py
@@ -44,8 +44,8 @@
         return service_client.ResponseBody(resp, body)
 
     def create_security_group(self, **kwargs):
-        """
-        Creates a new security group.
+        """Creates a new security group.
+
         name (Required): Name of security group.
         description (Required): Description of security group.
         """
@@ -56,8 +56,8 @@
         return service_client.ResponseBody(resp, body)
 
     def update_security_group(self, security_group_id, **kwargs):
-        """
-        Update a security group.
+        """Update a security group.
+
         security_group_id: a security_group to update
         name: new name of security group
         description: new description of security group
diff --git a/tempest/services/compute/json/server_groups_client.py b/tempest/services/compute/json/server_groups_client.py
index 7284e02..44ac015 100644
--- a/tempest/services/compute/json/server_groups_client.py
+++ b/tempest/services/compute/json/server_groups_client.py
@@ -23,8 +23,8 @@
 class ServerGroupsClient(service_client.ServiceClient):
 
     def create_server_group(self, **kwargs):
-        """
-        Create the server group
+        """Create the server group
+
         name : Name of the server-group
         policies : List of the policies - affinity/anti-affinity)
         """
diff --git a/tempest/services/compute/json/services_client.py b/tempest/services/compute/json/services_client.py
index 6e2f320..57d0434 100644
--- a/tempest/services/compute/json/services_client.py
+++ b/tempest/services/compute/json/services_client.py
@@ -34,8 +34,8 @@
         return service_client.ResponseBody(resp, body)
 
     def enable_service(self, **kwargs):
-        """
-        Enable service on a host
+        """Enable service on a host
+
         host_name: Name of host
         binary: Service binary
         """
@@ -46,8 +46,8 @@
         return service_client.ResponseBody(resp, body)
 
     def disable_service(self, **kwargs):
-        """
-        Disable service on a host
+        """Disable service on a host
+
         host_name: Name of host
         binary: Service binary
         """
diff --git a/tempest/services/compute/json/volumes_client.py b/tempest/services/compute/json/volumes_client.py
index e799c29..69d982e 100644
--- a/tempest/services/compute/json/volumes_client.py
+++ b/tempest/services/compute/json/volumes_client.py
@@ -46,8 +46,8 @@
         return service_client.ResponseBody(resp, body)
 
     def create_volume(self, **kwargs):
-        """
-        Creates a new Volume.
+        """Creates a new Volume.
+
         size(Required): Size of volume in GB.
         Following optional keyword arguments are accepted:
         display_name: Optional Volume Name.
diff --git a/tempest/services/identity/v2/json/identity_client.py b/tempest/services/identity/v2/json/identity_client.py
index b27f036..aef7884 100644
--- a/tempest/services/identity/v2/json/identity_client.py
+++ b/tempest/services/identity/v2/json/identity_client.py
@@ -119,13 +119,6 @@
         body = json.loads(body)
         return service_client.ResponseBody(resp, body)
 
-    def get_tenant_by_name(self, tenant_name):
-        tenants = self.list_tenants()['tenants']
-        for tenant in tenants:
-            if tenant['name'] == tenant_name:
-                return tenant
-        raise lib_exc.NotFound('No such tenant')
-
     def update_tenant(self, tenant_id, **kwargs):
         """Updates a tenant."""
         body = self.show_tenant(tenant_id)['tenant']
diff --git a/tempest/services/network/json/floating_ips_client.py b/tempest/services/network/json/floating_ips_client.py
new file mode 100644
index 0000000..5c490ed
--- /dev/null
+++ b/tempest/services/network/json/floating_ips_client.py
@@ -0,0 +1,38 @@
+#    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.services.network.json import base
+
+
+class FloatingIPsClient(base.BaseNetworkClient):
+
+    def create_floatingip(self, **kwargs):
+        uri = '/floatingips'
+        post_data = {'floatingip': kwargs}
+        return self.create_resource(uri, post_data)
+
+    def update_floatingip(self, floatingip_id, **kwargs):
+        uri = '/floatingips/%s' % floatingip_id
+        post_data = {'floatingip': kwargs}
+        return self.update_resource(uri, post_data)
+
+    def show_floatingip(self, floatingip_id, **fields):
+        uri = '/floatingips/%s' % floatingip_id
+        return self.show_resource(uri, **fields)
+
+    def delete_floatingip(self, floatingip_id):
+        uri = '/floatingips/%s' % floatingip_id
+        return self.delete_resource(uri)
+
+    def list_floatingips(self, **filters):
+        uri = '/floatingips'
+        return self.list_resources(uri, **filters)
diff --git a/tempest/services/network/json/network_client.py b/tempest/services/network/json/network_client.py
index 50a5d5e..5a4229c 100644
--- a/tempest/services/network/json/network_client.py
+++ b/tempest/services/network/json/network_client.py
@@ -35,28 +35,6 @@
     quotas
     """
 
-    def create_floatingip(self, **kwargs):
-        uri = '/floatingips'
-        post_data = {'floatingip': kwargs}
-        return self.create_resource(uri, post_data)
-
-    def update_floatingip(self, floatingip_id, **kwargs):
-        uri = '/floatingips/%s' % floatingip_id
-        post_data = {'floatingip': kwargs}
-        return self.update_resource(uri, post_data)
-
-    def show_floatingip(self, floatingip_id, **fields):
-        uri = '/floatingips/%s' % floatingip_id
-        return self.show_resource(uri, **fields)
-
-    def delete_floatingip(self, floatingip_id):
-        uri = '/floatingips/%s' % floatingip_id
-        return self.delete_resource(uri)
-
-    def list_floatingips(self, **filters):
-        uri = '/floatingips'
-        return self.list_resources(uri, **filters)
-
     def create_metering_label(self, **kwargs):
         uri = '/metering/metering-labels'
         post_data = {'metering_label': kwargs}
diff --git a/tempest/stress/actions/unit_test.py b/tempest/stress/actions/unit_test.py
index c376693..3b27885 100644
--- a/tempest/stress/actions/unit_test.py
+++ b/tempest/stress/actions/unit_test.py
@@ -35,6 +35,7 @@
 
 class UnitTest(stressaction.StressAction):
     """This is a special action for running existing unittests as stress test.
+
        You need to pass ``test_method`` and ``class_setup_per``
        using ``kwargs`` in the JSON descriptor;
        ``test_method`` should be the fully qualified name of a unittest,
diff --git a/tempest/stress/actions/volume_attach_verify.py b/tempest/stress/actions/volume_attach_verify.py
index 4840383..fa0bb8b 100644
--- a/tempest/stress/actions/volume_attach_verify.py
+++ b/tempest/stress/actions/volume_attach_verify.py
@@ -121,6 +121,7 @@
 
     def setUp(self, **kwargs):
         """Note able configuration combinations:
+
             Closest options to the test_stamp_pattern:
                 new_server = True
                 new_volume = True
diff --git a/tempest/stress/driver.py b/tempest/stress/driver.py
index eec52cb..8359efd 100644
--- a/tempest/stress/driver.py
+++ b/tempest/stress/driver.py
@@ -49,9 +49,9 @@
 
 
 def _get_compute_nodes(controller, ssh_user, ssh_key=None):
-    """
-    Returns a list of active compute nodes. List is generated by running
-    nova-manage on the controller.
+    """Returns a list of active compute nodes.
+
+    List is generated by running nova-manage on the controller.
     """
     nodes = []
     cmd = "nova-manage service list | grep ^nova-compute"
@@ -69,9 +69,7 @@
 
 def _has_error_in_logs(logfiles, nodes, ssh_user, ssh_key=None,
                        stop_on_error=False):
-    """
-    Detect errors in the nova log files on the controller and compute nodes.
-    """
+    """Detect errors in nova log files on the controller and compute nodes."""
     grep = 'egrep "ERROR|TRACE" %s' % logfiles
     ret = False
     for node in nodes:
@@ -85,9 +83,7 @@
 
 
 def sigchld_handler(signalnum, frame):
-    """
-    Signal handler (only active if stop_on_error is True).
-    """
+    """Signal handler (only active if stop_on_error is True)."""
     for process in processes:
         if (not process['process'].is_alive() and
                 process['process'].exitcode != 0):
@@ -97,9 +93,7 @@
 
 
 def terminate_all_processes(check_interval=20):
-    """
-    Goes through the process list and terminates all child processes.
-    """
+    """Goes through the process list and terminates all child processes."""
     LOG.info("Stopping all processes.")
     for process in processes:
         if process['process'].is_alive():
@@ -120,9 +114,7 @@
 
 
 def stress_openstack(tests, duration, max_runs=None, stop_on_error=False):
-    """
-    Workload driver. Executes an action function against a nova-cluster.
-    """
+    """Workload driver. Executes an action function against a nova-cluster."""
     admin_manager = credentials.AdminManager()
 
     ssh_user = CONF.stress.target_ssh_user
diff --git a/tempest/stress/stressaction.py b/tempest/stress/stressaction.py
index a3d0d17..c8bd652 100644
--- a/tempest/stress/stressaction.py
+++ b/tempest/stress/stressaction.py
@@ -40,32 +40,35 @@
 
     @property
     def action(self):
-        """This methods returns the action. Overload this if you
-        create a stress test wrapper.
+        """This methods returns the action.
+
+        Overload this if you create a stress test wrapper.
         """
         return self.__class__.__name__
 
     def setUp(self, **kwargs):
-        """This method is called before the run method
-        to help the test initialize any structures.
-        kwargs contains arguments passed in from the
-        configuration json file.
+        """Initialize test structures/resources
+
+        This method is called before "run" method to help the test
+        initialize any structures. kwargs contains arguments passed
+        in from the configuration json file.
 
         setUp doesn't count against the time duration.
         """
         self.logger.debug("setUp")
 
     def tearDown(self):
-        """This method is called to do any cleanup
-        after the test is complete.
+        """Cleanup test structures/resources
+
+        This method is called to do any cleanup after the test is complete.
         """
         self.logger.debug("tearDown")
 
     def execute(self, shared_statistic):
-        """This is the main execution entry point called
-        by the driver.   We register a signal handler to
-        allow us to tearDown gracefully, and then exit.
-        We also keep track of how many runs we do.
+        """This is the main execution entry point called by the driver.
+
+        We register a signal handler to allow us to tearDown gracefully,
+        and then exit. We also keep track of how many runs we do.
         """
         signal.signal(signal.SIGHUP, self._shutdown_handler)
         signal.signal(signal.SIGTERM, self._shutdown_handler)
diff --git a/tempest/test.py b/tempest/test.py
index 4be6779..7b508ac 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -211,6 +211,7 @@
 class BaseTestCase(testtools.testcase.WithAttributes,
                    testtools.TestCase):
     """The test base class defines Tempest framework for class level fixtures.
+
     `setUpClass` and `tearDownClass` are defined here and cannot be overwritten
     by subclasses (enforced via hacking rule T105).
 
@@ -315,8 +316,10 @@
 
     @classmethod
     def skip_checks(cls):
-        """Class level skip checks. Subclasses verify in here all
-        conditions that might prevent the execution of the entire test class.
+        """Class level skip checks.
+
+        Subclasses verify in here all conditions that might prevent the
+        execution of the entire test class.
         Checks implemented here may not make use API calls, and should rely on
         configuration alone.
         In general skip checks that require an API call are discouraged.
@@ -343,6 +346,7 @@
     @classmethod
     def setup_credentials(cls):
         """Allocate credentials and the client managers from them.
+
         A test class that requires network resources must override
         setup_credentials and defined the required resources before super
         is invoked.
@@ -380,8 +384,7 @@
 
     @classmethod
     def resource_setup(cls):
-        """Class level resource setup for test cases.
-        """
+        """Class level resource setup for test cases."""
         if hasattr(cls, "os"):
             cls.validation_resources = vresources.create_validation_resources(
                 cls.os, cls.validation_resources)
@@ -392,6 +395,7 @@
     @classmethod
     def resource_cleanup(cls):
         """Class level resource cleanup for test cases.
+
         Resource cleanup must be able to handle the case of partially setup
         resources, in case a failure during `resource_setup` should happen.
         """
@@ -523,9 +527,7 @@
 
     @classmethod
     def clear_credentials(cls):
-        """
-        Clears creds if set
-        """
+        """Clears creds if set"""
         if hasattr(cls, '_creds_provider'):
             cls._creds_provider.clear_creds()
 
@@ -534,6 +536,7 @@
                                  security_group=None,
                                  security_group_rules=None):
         """Specify which ssh server validation resources should be created.
+
         Each of the argument must be set to either None, True or False, with
         None - use default from config (security groups and security group
                rules get created when set to None)
@@ -631,10 +634,11 @@
 
     @staticmethod
     def load_tests(*args):
-        """
-        Wrapper for testscenarios to set the mandatory scenarios variable
-        only in case a real test loader is in place. Will be automatically
-        called in case the variable "load_tests" is set.
+        """Wrapper for testscenarios
+
+        To set the mandatory scenarios variable only in case a real test
+        loader is in place. Will be automatically called in case the variable
+        "load_tests" is set.
         """
         if getattr(args[0], 'suiteClass', None) is not None:
             loader, standard_tests, pattern = args
@@ -649,8 +653,7 @@
 
     @staticmethod
     def generate_scenario(description):
-        """
-        Generates the test scenario list for a given description.
+        """Generates the test scenario list for a given description.
 
         :param description: A file or dictionary with the following entries:
             name (required) name for the api
@@ -694,7 +697,8 @@
         return scenario_list
 
     def execute(self, description):
-        """
+        """Execute a http call
+
         Execute a http call on an api that are expected to
         result in client errors. First it uses invalid resources that are part
         of the url, and then invalid data for queries and http request bodies.
@@ -788,7 +792,8 @@
 
     @classmethod
     def set_resource(cls, name, resource):
-        """
+        """Register a resoruce for a test
+
         This function can be used in setUpClass context to register a resoruce
         for a test.
 
@@ -799,10 +804,10 @@
         cls._resources[name] = resource
 
     def get_resource(self, name):
-        """
-        Return a valid uuid for a type of resource. If a real resource is
-        needed as part of a url then this method should return one. Otherwise
-        it can return None.
+        """Return a valid uuid for a type of resource.
+
+        If a real resource is needed as part of a url then this method should
+        return one. Otherwise it can return None.
 
         :param name: The name of the kind of resource such as "flavor", "role",
             etc.
@@ -819,9 +824,7 @@
 
 
 def SimpleNegativeAutoTest(klass):
-    """
-    This decorator registers a test function on basis of the class name.
-    """
+    """This decorator registers a test function on basis of the class name."""
     @attr(type=['negative'])
     def generic_test(self):
         if hasattr(self, '_schema'):
@@ -838,10 +841,9 @@
 
 
 def call_until_true(func, duration, sleep_for):
-    """
-    Call the given function until it returns True (and return True) or
-    until the specified duration (in seconds) elapses (and return
-    False).
+    """Call the given function until it returns True (and return True)
+
+    or until the specified duration (in seconds) elapses (and return False).
 
     :param func: A zero argument callable that returns True on success.
     :param duration: The number of seconds for which to attempt a
diff --git a/tempest/test_discover/plugins.py b/tempest/test_discover/plugins.py
index 58a9905..108b50d 100644
--- a/tempest/test_discover/plugins.py
+++ b/tempest/test_discover/plugins.py
@@ -25,14 +25,14 @@
 
 @six.add_metaclass(abc.ABCMeta)
 class TempestPlugin(object):
-    """A TempestPlugin class provides the basic hooks for an external
-    plugin to provide tempest the necessary information to run the plugin.
+    """Provide basic hooks for an external plugin
+
+    To provide tempest the necessary information to run the plugin.
     """
 
     @abc.abstractmethod
     def load_tests(self):
-        """Method to return the information necessary to load the tests in the
-        plugin.
+        """Return the information necessary to load the tests in the plugin.
 
         :return: a tuple with the first value being the test_dir and the second
                  being the top_level
@@ -42,9 +42,10 @@
 
     @abc.abstractmethod
     def register_opts(self, conf):
-        """Method to add additional configuration options to tempest. This
-        method will be run for the plugin during the register_opts() function
-        in tempest.config
+        """Add additional configuration options to tempest.
+
+        This method will be run for the plugin during the register_opts()
+        function in tempest.config
 
         :param ConfigOpts conf: The conf object that can be used to register
             additional options on.
@@ -53,7 +54,7 @@
 
     @abc.abstractmethod
     def get_opt_lists(self):
-        """Method to get a list of options for sample config generation
+        """Get a list of options for sample config generation
 
         :return option_list: A list of tuples with the group name and options
                              in that group.
diff --git a/tempest/tests/base.py b/tempest/tests/base.py
index 27eb2c4..fe9268e 100644
--- a/tempest/tests/base.py
+++ b/tempest/tests/base.py
@@ -26,8 +26,7 @@
         self.stubs = mox_fixture.stubs
 
     def patch(self, target, **kwargs):
-        """
-        Returns a started `mock.patch` object for the supplied target.
+        """Returns a started `mock.patch` object for the supplied target.
 
         The caller may then call the returned patcher to create a mock object.
 
diff --git a/tempest/tests/cmd/test_javelin.py b/tempest/tests/cmd/test_javelin.py
index fc3d984..ea0b7a7 100644
--- a/tempest/tests/cmd/test_javelin.py
+++ b/tempest/tests/cmd/test_javelin.py
@@ -106,8 +106,9 @@
         self.assertFalse(mocked_function.called)
 
     def test_create_users(self):
-        self.fake_client.identity.get_tenant_by_name.return_value = \
-            self.fake_object['tenant']
+        self.useFixture(mockpatch.Patch(
+                        'tempest.common.identity.get_tenant_by_name',
+                        return_value=self.fake_object['tenant']))
         self.fake_client.identity.get_user_by_username.side_effect = \
             lib_exc.NotFound("user is not found")
         self.useFixture(mockpatch.PatchObject(javelin, "keystone_admin",
@@ -125,8 +126,9 @@
                                                 enabled=True)
 
     def test_create_user_missing_tenant(self):
-        self.fake_client.identity.get_tenant_by_name.side_effect = \
-            lib_exc.NotFound("tenant is not found")
+        self.useFixture(mockpatch.Patch(
+                        'tempest.common.identity.get_tenant_by_name',
+                        side_effect=lib_exc.NotFound("tenant is not found")))
         self.useFixture(mockpatch.PatchObject(javelin, "keystone_admin",
                                               return_value=self.fake_client))
 
@@ -289,8 +291,9 @@
 
         fake_tenant = self.fake_object['tenant']
         fake_auth = self.fake_client
-        fake_auth.identity.get_tenant_by_name.return_value = fake_tenant
-
+        self.useFixture(mockpatch.Patch(
+                        'tempest.common.identity.get_tenant_by_name',
+                        return_value=fake_tenant))
         self.useFixture(mockpatch.PatchObject(javelin, "keystone_admin",
                                               return_value=fake_auth))
         javelin.destroy_tenants([fake_tenant])
@@ -304,7 +307,8 @@
         fake_tenant = self.fake_object['tenant']
 
         fake_auth = self.fake_client
-        fake_auth.identity.get_tenant_by_name.return_value = fake_tenant
+        fake_auth.identity.list_tenants.return_value = \
+            {'tenants': [fake_tenant]}
         fake_auth.identity.get_user_by_username.return_value = fake_user
 
         self.useFixture(mockpatch.PatchObject(javelin, "keystone_admin",
diff --git a/tempest/tests/fake_http.py b/tempest/tests/fake_http.py
index 7d77484..d714055 100644
--- a/tempest/tests/fake_http.py
+++ b/tempest/tests/fake_http.py
@@ -50,7 +50,8 @@
 class fake_httplib(object):
     def __init__(self, headers, body=None,
                  version=1.0, status=200, reason="Ok"):
-        """
+        """Initialization of fake httplib
+
         :param headers: dict representing HTTP response headers
         :param body: file-like object
         :param version: HTTP Version
diff --git a/tempest/tests/stress/test_stress.py b/tempest/tests/stress/test_stress.py
index 16f1ac7..0ec2a5d 100644
--- a/tempest/tests/stress/test_stress.py
+++ b/tempest/tests/stress/test_stress.py
@@ -25,8 +25,7 @@
 
 
 class StressFrameworkTest(base.TestCase):
-    """Basic test for the stress test framework.
-    """
+    """Basic test for the stress test framework."""
 
     def _cmd(self, cmd, param):
         """Executes specified command."""
diff --git a/tempest/tests/test_hacking.py b/tempest/tests/test_hacking.py
index 62d2aee..55f00ef 100644
--- a/tempest/tests/test_hacking.py
+++ b/tempest/tests/test_hacking.py
@@ -17,7 +17,8 @@
 
 
 class HackingTestCase(base.TestCase):
-    """
+    """Test class for hacking rule
+
     This class tests the hacking checks in tempest.hacking.checks by passing
     strings to the check methods like the pep8/flake8 parser would. The parser
     loops over each line in the file and then passes the parameters to the
diff --git a/tempest/thirdparty/boto/test.py b/tempest/thirdparty/boto/test.py
index 05c47bb..cfd3747 100644
--- a/tempest/thirdparty/boto/test.py
+++ b/tempest/thirdparty/boto/test.py
@@ -110,8 +110,10 @@
     CODE_RE = '.*'  # regexp makes sense in group match
 
     def match(self, exc):
-        """:returns: Returns with an error string if it does not match,
-               returns with None when it matches.
+        """Check boto exception
+
+        :returns: Returns with an error string if it does not match,
+                  returns with None when it matches.
         """
         if not isinstance(exc, exception.BotoServerError):
             return "%r not an BotoServerError instance" % exc
@@ -136,9 +138,9 @@
 
 
 def _add_matcher_class(error_cls, error_data, base=BotoExceptionMatcher):
-    """
-        Usable for adding an ExceptionMatcher(s) into the exception tree.
-        The not leaf elements does wildcard match
+    """Usable for adding an ExceptionMatcher(s) into the exception tree.
+
+       The not leaf elements does wildcard match
     """
     # in error_code just literal and '.' characters expected
     if not isinstance(error_data, six.string_types):
@@ -227,6 +229,7 @@
     @classmethod
     def addResourceCleanUp(cls, function, *args, **kwargs):
         """Adds CleanUp callable, used by tearDownClass.
+
         Recommended to a use (deep)copy on the mutable args.
         """
         cls._sequence = cls._sequence + 1
@@ -242,6 +245,7 @@
     def assertBotoError(self, excMatcher, callableObj,
                         *args, **kwargs):
         """Example usage:
+
             self.assertBotoError(self.ec2_error_code.client.
                                  InvalidKeyPair.Duplicate,
                                  self.client.create_keypair,
@@ -258,7 +262,8 @@
 
     @classmethod
     def resource_cleanup(cls):
-        """Calls the callables added by addResourceCleanUp,
+        """Calls the callables added by addResourceCleanUp
+
         when you overwrite this function don't forget to call this too.
         """
         fail_count = 0
@@ -302,10 +307,9 @@
 
     @classmethod
     def get_lfunction_gone(cls, obj):
-        """If the object is instance of a well know type returns back with
-            with the corresponding function otherwise it assumes the obj itself
-            is the function.
-            """
+        # NOTE: If the object is instance of a well know type returns back with
+        # with the corresponding function otherwise it assumes the obj itself
+        # is the function.
         ec = cls.ec2_error_code
         if isinstance(obj, ec2.instance.Instance):
             colusure_matcher = ec.client.InvalidInstanceID.NotFound
@@ -489,6 +493,7 @@
     @classmethod
     def destroy_security_group_wait(cls, group):
         """Delete group.
+
            Use just for teardown!
         """
         # NOTE(afazekas): should wait/try until all related instance terminates
@@ -497,6 +502,7 @@
     @classmethod
     def destroy_volume_wait(cls, volume):
         """Delete volume, tries to detach first.
+
            Use just for teardown!
         """
         exc_num = 0
diff --git a/test-requirements.txt b/test-requirements.txt
index db2b2ce..5b01ea9 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 # needed for doc build
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 python-subunit>=0.0.18
-oslosphinx>=2.5.0 # Apache-2.0
+oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 mox>=0.5.3
 mock>=1.2
 coverage>=3.6
diff --git a/tox.ini b/tox.ini
index 09c8626..892cfed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -129,6 +129,6 @@
 # E123 skipped because it is ignored by default in the default pep8
 # E129 skipped because it is too limiting when combined with other rules
 # Skipped because of new hacking 0.9: H405
-ignore = E125,E123,E129,H404,H405
+ignore = E125,E123,E129
 show-source = True
 exclude = .git,.venv,.tox,dist,doc,openstack,*egg