diff --git a/tempest/api/compute/admin/test_auto_allocate_network.py b/tempest/api/compute/admin/test_auto_allocate_network.py
index ea92563..0c80252 100644
--- a/tempest/api/compute/admin/test_auto_allocate_network.py
+++ b/tempest/api/compute/admin/test_auto_allocate_network.py
@@ -16,7 +16,6 @@
 
 from tempest.api.compute import base
 from tempest.common import compute
-from tempest.common import credentials_factory as credentials
 from tempest.common import utils
 from tempest import config
 from tempest.lib.common.utils import test_utils
@@ -46,11 +45,6 @@
     @classmethod
     def skip_checks(cls):
         super(AutoAllocateNetworkTest, cls).skip_checks()
-        identity_version = cls.get_identity_version()
-        if not credentials.is_admin_available(
-                identity_version=identity_version):
-            msg = "Missing Identity Admin API credentials in configuration."
-            raise cls.skipException(msg)
         if not CONF.service_available.neutron:
             raise cls.skipException('Neutron is required')
         if not utils.is_extension_enabled('auto-allocated-topology',
diff --git a/tempest/api/compute/admin/test_fixed_ips.py b/tempest/api/compute/admin/test_fixed_ips.py
index 69c8a82..ebba73c 100644
--- a/tempest/api/compute/admin/test_fixed_ips.py
+++ b/tempest/api/compute/admin/test_fixed_ips.py
@@ -29,6 +29,8 @@
         if CONF.service_available.neutron:
             msg = ("%s skipped as neutron is available" % cls.__name__)
             raise cls.skipException(msg)
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
 
     @classmethod
     def setup_clients(cls):
@@ -49,17 +51,14 @@
                 break
 
     @decorators.idempotent_id('16b7d848-2f7c-4709-85a3-2dfb4576cc52')
-    @utils.services('network')
     def test_list_fixed_ip_details(self):
         fixed_ip = self.client.show_fixed_ip(self.ip)
         self.assertEqual(fixed_ip['fixed_ip']['address'], self.ip)
 
     @decorators.idempotent_id('5485077b-7e46-4cec-b402-91dc3173433b')
-    @utils.services('network')
     def test_set_reserve(self):
         self.client.reserve_fixed_ip(self.ip, reserve="None")
 
     @decorators.idempotent_id('7476e322-b9ff-4710-bf82-49d51bac6e2e')
-    @utils.services('network')
     def test_set_unreserve(self):
         self.client.reserve_fixed_ip(self.ip, unreserve="None")
diff --git a/tempest/api/compute/admin/test_fixed_ips_negative.py b/tempest/api/compute/admin/test_fixed_ips_negative.py
index c54c866..a5deb3c 100644
--- a/tempest/api/compute/admin/test_fixed_ips_negative.py
+++ b/tempest/api/compute/admin/test_fixed_ips_negative.py
@@ -29,6 +29,8 @@
         if CONF.service_available.neutron:
             msg = ("%s skipped as neutron is available" % cls.__name__)
             raise cls.skipException(msg)
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
 
     @classmethod
     def setup_clients(cls):
@@ -51,14 +53,12 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('9f17f47d-daad-4adc-986e-12370c93e407')
-    @utils.services('network')
     def test_list_fixed_ip_details_with_non_admin_user(self):
         self.assertRaises(lib_exc.Forbidden,
                           self.non_admin_client.show_fixed_ip, self.ip)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ce60042c-fa60-4836-8d43-1c8e3359dc47')
-    @utils.services('network')
     def test_set_reserve_with_non_admin_user(self):
         self.assertRaises(lib_exc.Forbidden,
                           self.non_admin_client.reserve_fixed_ip,
@@ -66,7 +66,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('f1f7a35b-0390-48c5-9803-5f27461439db')
-    @utils.services('network')
     def test_set_unreserve_with_non_admin_user(self):
         self.assertRaises(lib_exc.Forbidden,
                           self.non_admin_client.reserve_fixed_ip,
@@ -74,7 +73,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('f51cf464-7fc5-4352-bc3e-e75cfa2cb717')
-    @utils.services('network')
     def test_set_reserve_with_invalid_ip(self):
         # NOTE(maurosr): since this exercises the same code snippet, we do it
         # only for reserve action
@@ -87,7 +85,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('fd26ef50-f135-4232-9d32-281aab3f9176')
-    @utils.services('network')
     def test_fixed_ip_with_invalid_action(self):
         self.assertRaises(lib_exc.BadRequest,
                           self.client.reserve_fixed_ip,
diff --git a/tempest/api/compute/floating_ips/test_floating_ips_actions.py b/tempest/api/compute/floating_ips/test_floating_ips_actions.py
index 4001e26..9ee0ac9 100644
--- a/tempest/api/compute/floating_ips/test_floating_ips_actions.py
+++ b/tempest/api/compute/floating_ips/test_floating_ips_actions.py
@@ -32,6 +32,8 @@
     @classmethod
     def skip_checks(cls):
         super(FloatingIPsTestJSON, cls).skip_checks()
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
         if not CONF.network_feature_enabled.floating_ips:
             raise cls.skipException("Floating ips are not available")
 
@@ -62,7 +64,6 @@
         super(FloatingIPsTestJSON, cls).resource_cleanup()
 
     @decorators.idempotent_id('f7bfb946-297e-41b8-9e8c-aba8e9bb5194')
-    @utils.services('network')
     def test_allocate_floating_ip(self):
         # Positive test:Allocation of a new floating IP to a project
         # should be successful
@@ -78,7 +79,6 @@
         self.assertIn(floating_ip_details, body)
 
     @decorators.idempotent_id('de45e989-b5ca-4a9b-916b-04a52e7bbb8b')
-    @utils.services('network')
     def test_delete_floating_ip(self):
         # Positive test:Deletion of valid floating IP from project
         # should be successful
@@ -93,7 +93,6 @@
         self.client.wait_for_resource_deletion(floating_ip_body['id'])
 
     @decorators.idempotent_id('307efa27-dc6f-48a0-8cd2-162ce3ef0b52')
-    @utils.services('network')
     @testtools.skipUnless(CONF.network.public_network_id,
                           'The public_network_id option must be specified.')
     def test_associate_disassociate_floating_ip(self):
@@ -116,7 +115,6 @@
             self.server_id)
 
     @decorators.idempotent_id('6edef4b2-aaf1-4abc-bbe3-993e2561e0fe')
-    @utils.services('network')
     @testtools.skipUnless(CONF.network.public_network_id,
                           'The public_network_id option must be specified.')
     def test_associate_already_associated_floating_ip(self):
diff --git a/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py b/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py
index 3455a81..c3d7816 100644
--- a/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py
+++ b/tempest/api/compute/floating_ips/test_floating_ips_actions_negative.py
@@ -30,6 +30,8 @@
     @classmethod
     def skip_checks(cls):
         super(FloatingIPsNegativeTestJSON, cls).skip_checks()
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
         if not CONF.network_feature_enabled.floating_ips:
             raise cls.skipException("Floating ips are not available")
 
@@ -58,7 +60,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('6e0f059b-e4dd-48fb-8207-06e3bba5b074')
-    @utils.services('network')
     def test_allocate_floating_ip_from_nonexistent_pool(self):
         # Negative test:Allocation of a new floating IP from a nonexistent_pool
         # to a project should fail
@@ -68,7 +69,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ae1c55a8-552b-44d4-bfb6-2a115a15d0ba')
-    @utils.services('network')
     def test_delete_nonexistent_floating_ip(self):
         # Negative test:Deletion of a nonexistent floating IP
         # from project should fail
@@ -79,7 +79,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('595fa616-1a71-4670-9614-46564ac49a4c')
-    @utils.services('network')
     def test_associate_nonexistent_floating_ip(self):
         # Negative test:Association of a non existent floating IP
         # to specific server should fail
@@ -90,7 +89,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('0a081a66-e568-4e6b-aa62-9587a876dca8')
-    @utils.services('network')
     def test_dissociate_nonexistent_floating_ip(self):
         # Negative test:Dissociation of a non existent floating IP should fail
         # Dissociating non existent floating IP
@@ -100,7 +98,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('804b4fcb-bbf5-412f-925d-896672b61eb3')
-    @utils.services('network')
     def test_associate_ip_to_server_without_passing_floating_ip(self):
         # Negative test:Association of empty floating IP to specific server
         # should raise NotFound or BadRequest(In case of Nova V2.1) exception.
@@ -110,7 +107,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('58a80596-ffb2-11e6-9393-fa163e4fa634')
-    @utils.services('network')
     @testtools.skipUnless(CONF.network.public_network_id,
                           'The public_network_id option must be specified.')
     def test_associate_ip_to_server_with_floating_ip(self):
diff --git a/tempest/api/compute/floating_ips/test_list_floating_ips.py b/tempest/api/compute/floating_ips/test_list_floating_ips.py
index 04d18c0..2314433 100644
--- a/tempest/api/compute/floating_ips/test_list_floating_ips.py
+++ b/tempest/api/compute/floating_ips/test_list_floating_ips.py
@@ -26,6 +26,8 @@
     @classmethod
     def skip_checks(cls):
         super(FloatingIPDetailsTestJSON, cls).skip_checks()
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
         if not CONF.network_feature_enabled.floating_ips:
             raise cls.skipException("Floating ips are not available")
 
@@ -53,7 +55,6 @@
         super(FloatingIPDetailsTestJSON, cls).resource_cleanup()
 
     @decorators.idempotent_id('16db31c3-fb85-40c9-bbe2-8cf7b67ff99f')
-    @utils.services('network')
     def test_list_floating_ips(self):
         # Positive test:Should return the list of floating IPs
         body = self.client.list_floating_ips()['floating_ips']
@@ -64,7 +65,6 @@
             self.assertIn(self.floating_ip[i], floating_ips)
 
     @decorators.idempotent_id('eef497e0-8ff7-43c8-85ef-558440574f84')
-    @utils.services('network')
     def test_get_floating_ip_details(self):
         # Positive test:Should be able to GET the details of floatingIP
         # Creating a floating IP for which details are to be checked
@@ -86,7 +86,6 @@
         self.assertEqual(floating_ip_id, body['id'])
 
     @decorators.idempotent_id('df389fc8-56f5-43cc-b290-20eda39854d3')
-    @utils.services('network')
     def test_list_floating_ip_pools(self):
         # Positive test:Should return the list of floating IP Pools
         floating_ip_pools = self.pools_client.list_floating_ip_pools()
diff --git a/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py b/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py
index f0b9fa5..0ade872 100644
--- a/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py
+++ b/tempest/api/compute/floating_ips/test_list_floating_ips_negative.py
@@ -28,6 +28,8 @@
     @classmethod
     def skip_checks(cls):
         super(FloatingIPDetailsNegativeTestJSON, cls).skip_checks()
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
         if not CONF.network_feature_enabled.floating_ips:
             raise cls.skipException("Floating ips are not available")
 
@@ -38,7 +40,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('7ab18834-4a4b-4f28-a2c5-440579866695')
-    @utils.services('network')
     def test_get_nonexistent_floating_ip_details(self):
         # Negative test:Should not be able to GET the details
         # of non-existent floating IP
diff --git a/tempest/api/compute/security_groups/base.py b/tempest/api/compute/security_groups/base.py
index 5260a99..54a6da8 100644
--- a/tempest/api/compute/security_groups/base.py
+++ b/tempest/api/compute/security_groups/base.py
@@ -24,6 +24,12 @@
 class BaseSecurityGroupsTest(base.BaseV2ComputeTest):
 
     @classmethod
+    def skip_checks(cls):
+        super(BaseSecurityGroupsTest, cls).skip_checks()
+        if not utils.get_service_list()['network']:
+            raise cls.skipException("network service not enabled.")
+
+    @classmethod
     def setup_credentials(cls):
         # A network and a subnet will be created for these tests
         cls.set_network_resources(network=True, subnet=True)
diff --git a/tempest/api/compute/security_groups/test_security_group_rules.py b/tempest/api/compute/security_groups/test_security_group_rules.py
index 06edc1c..4c99ea6 100644
--- a/tempest/api/compute/security_groups/test_security_group_rules.py
+++ b/tempest/api/compute/security_groups/test_security_group_rules.py
@@ -14,7 +14,6 @@
 #    under the License.
 
 from tempest.api.compute.security_groups import base
-from tempest.common import utils
 from tempest.lib import decorators
 
 
@@ -55,7 +54,6 @@
 
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('850795d7-d4d3-4e55-b527-a774c0123d3a')
-    @utils.services('network')
     def test_security_group_rules_create(self):
         # Positive test: Creation of Security Group rule
         # should be successful
@@ -73,7 +71,6 @@
         self._check_expected_response(rule)
 
     @decorators.idempotent_id('7a01873e-3c38-4f30-80be-31a043cfe2fd')
-    @utils.services('network')
     def test_security_group_rules_create_with_optional_cidr(self):
         # Positive test: Creation of Security Group rule
         # with optional argument cidr
@@ -96,7 +93,6 @@
         self._check_expected_response(rule)
 
     @decorators.idempotent_id('7f5d2899-7705-4d4b-8458-4505188ffab6')
-    @utils.services('network')
     def test_security_group_rules_create_with_optional_group_id(self):
         # Positive test: Creation of Security Group rule
         # with optional argument group_id
@@ -125,7 +121,6 @@
 
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('a6154130-5a55-4850-8be4-5e9e796dbf17')
-    @utils.services('network')
     def test_security_group_rules_list(self):
         # Positive test: Created Security Group rules should be
         # in the list of all rules
@@ -163,7 +158,6 @@
         self.assertNotEmpty([i for i in rules if i['id'] == rule2_id])
 
     @decorators.idempotent_id('fc5c5acf-2091-43a6-a6ae-e42760e9ffaf')
-    @utils.services('network')
     def test_security_group_rules_delete_when_peer_group_deleted(self):
         # Positive test:rule will delete when peer group deleting
         # Creating a Security Group to add rules to it
diff --git a/tempest/api/compute/security_groups/test_security_group_rules_negative.py b/tempest/api/compute/security_groups/test_security_group_rules_negative.py
index f344d84..8283aae 100644
--- a/tempest/api/compute/security_groups/test_security_group_rules_negative.py
+++ b/tempest/api/compute/security_groups/test_security_group_rules_negative.py
@@ -14,7 +14,6 @@
 #    under the License.
 
 from tempest.api.compute.security_groups import base
-from tempest.common import utils
 from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
@@ -29,7 +28,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('1d507e98-7951-469b-82c3-23f1e6b8c254')
-    @utils.services('network')
     def test_create_security_group_rule_with_non_existent_id(self):
         # Negative test: Creation of Security Group rule should FAIL
         # with non existent Parent group id
@@ -46,7 +44,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('2244d7e4-adb7-4ecb-9930-2d77e123ce4f')
-    @utils.services('network')
     def test_create_security_group_rule_with_invalid_id(self):
         # Negative test: Creation of Security Group rule should FAIL
         # with Parent group id which is not integer
@@ -63,7 +60,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('8bd56d02-3ffa-4d67-9933-b6b9a01d6089')
-    @utils.services('network')
     def test_create_security_group_rule_duplicate(self):
         # Negative test: Create Security Group rule duplicate should fail
         # Creating a Security Group to add rule to it
@@ -88,7 +84,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('84c81249-9f6e-439c-9bbf-cbb0d2cddbdf')
-    @utils.services('network')
     def test_create_security_group_rule_with_invalid_ip_protocol(self):
         # Negative test: Creation of Security Group rule should FAIL
         # with invalid ip_protocol
@@ -108,7 +103,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('12bbc875-1045-4f7a-be46-751277baedb9')
-    @utils.services('network')
     def test_create_security_group_rule_with_invalid_from_port(self):
         # Negative test: Creation of Security Group rule should FAIL
         # with invalid from_port
@@ -127,7 +121,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ff88804d-144f-45d1-bf59-dd155838a43a')
-    @utils.services('network')
     def test_create_security_group_rule_with_invalid_to_port(self):
         # Negative test: Creation of Security Group rule should FAIL
         # with invalid to_port
@@ -146,7 +139,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('00296fa9-0576-496a-ae15-fbab843189e0')
-    @utils.services('network')
     def test_create_security_group_rule_with_invalid_port_range(self):
         # Negative test: Creation of Security Group rule should FAIL
         # with invalid port range.
@@ -165,7 +157,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('56fddcca-dbb8-4494-a0db-96e9f869527c')
-    @utils.services('network')
     def test_delete_security_group_rule_with_non_existent_id(self):
         # Negative test: Deletion of Security Group rule should be FAIL
         # with non existent id
diff --git a/tempest/api/compute/security_groups/test_security_groups.py b/tempest/api/compute/security_groups/test_security_groups.py
index 01b19ca..eeb423e 100644
--- a/tempest/api/compute/security_groups/test_security_groups.py
+++ b/tempest/api/compute/security_groups/test_security_groups.py
@@ -14,7 +14,6 @@
 #    under the License.
 
 from tempest.api.compute.security_groups import base
-from tempest.common import utils
 from tempest.common import waiters
 from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
@@ -30,7 +29,6 @@
 
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('eb2b087d-633d-4d0d-a7bd-9e6ba35b32de')
-    @utils.services('network')
     def test_security_groups_create_list_delete(self):
         # Positive test:Should return the list of Security Groups
         # Create 3 Security Groups
@@ -62,7 +60,6 @@
                                             for m_group in deleted_sgs))
 
     @decorators.idempotent_id('ecc0da4a-2117-48af-91af-993cca39a615')
-    @utils.services('network')
     def test_security_group_create_get_delete(self):
         # Security Group should be created, fetched and deleted
         # with char space between name along with
@@ -83,7 +80,6 @@
         self.client.wait_for_resource_deletion(securitygroup['id'])
 
     @decorators.idempotent_id('fe4abc0d-83f5-4c50-ad11-57a1127297a2')
-    @utils.services('network')
     def test_server_security_groups(self):
         # Checks that security groups may be added and linked to a server
         # and not deleted if the server is active.
@@ -125,7 +121,6 @@
         self.client.delete_security_group(sg2['id'])
 
     @decorators.idempotent_id('7d4e1d3c-3209-4d6d-b020-986304ebad1f')
-    @utils.services('network')
     def test_update_security_groups(self):
         # Update security group name and description
         # Create a security group
@@ -144,7 +139,6 @@
         self.assertEqual(s_new_des, fetched_group['description'])
 
     @decorators.idempotent_id('79517d60-535a-438f-af3d-e6feab1cbea7')
-    @utils.services('network')
     def test_list_security_groups_by_server(self):
         # Create a couple security groups that we will use
         # for the server resource this test creates
diff --git a/tempest/api/compute/security_groups/test_security_groups_negative.py b/tempest/api/compute/security_groups/test_security_groups_negative.py
index e727dbb..9c44bb2 100644
--- a/tempest/api/compute/security_groups/test_security_groups_negative.py
+++ b/tempest/api/compute/security_groups/test_security_groups_negative.py
@@ -16,7 +16,6 @@
 import testtools
 
 from tempest.api.compute.security_groups import base
-from tempest.common import utils
 from tempest import config
 from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
@@ -34,7 +33,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('673eaec1-9b3e-48ed-bdf1-2786c1b9661c')
-    @utils.services('network')
     def test_security_group_get_nonexistent_group(self):
         # Negative test:Should not be able to GET the details
         # of non-existent Security Group
@@ -46,7 +44,6 @@
                              condition=CONF.service_available.neutron)
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('1759c3cb-b0fc-44b7-86ce-c99236be911d')
-    @utils.services('network')
     def test_security_group_create_with_invalid_group_name(self):
         # Negative test: Security Group should not be created with group name
         # as an empty string/with white spaces/chars more than 255
@@ -69,7 +66,6 @@
                              condition=CONF.service_available.neutron)
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('777b6f14-aca9-4758-9e84-38783cfa58bc')
-    @utils.services('network')
     def test_security_group_create_with_invalid_group_description(self):
         # Negative test: Security Group should not be created with description
         # longer than 255 chars. Empty description is allowed by the API
@@ -85,7 +81,6 @@
     @testtools.skipIf(CONF.service_available.neutron,
                       "Neutron allows duplicate names for security groups")
     @decorators.attr(type=['negative'])
-    @utils.services('network')
     def test_security_group_create_with_duplicate_name(self):
         # Negative test:Security Group with duplicate name should not
         # be created
@@ -99,7 +94,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('36a1629f-c6da-4a26-b8b8-55e7e5d5cd58')
-    @utils.services('network')
     def test_delete_the_default_security_group(self):
         # Negative test:Deletion of the "default" Security Group should Fail
         default_security_group_id = None
@@ -115,7 +109,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('6727c00b-214c-4f9e-9a52-017ac3e98411')
-    @utils.services('network')
     def test_delete_nonexistent_security_group(self):
         # Negative test:Deletion of a non-existent Security Group should fail
         non_exist_id = self.generate_random_security_group_id()
@@ -124,7 +117,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('1438f330-8fa4-4aeb-8a94-37c250106d7f')
-    @utils.services('network')
     def test_delete_security_group_without_passing_id(self):
         # Negative test:Deletion of a Security Group with out passing ID
         # should Fail
@@ -135,7 +127,6 @@
     @testtools.skipIf(CONF.service_available.neutron,
                       "Neutron does not check the security group ID")
     @decorators.attr(type=['negative'])
-    @utils.services('network')
     def test_update_security_group_with_invalid_sg_id(self):
         # Update security_group with invalid sg_id should fail
         s_name = data_utils.rand_name('sg')
@@ -150,7 +141,6 @@
     @testtools.skipIf(CONF.service_available.neutron,
                       "Neutron does not check the security group name")
     @decorators.attr(type=['negative'])
-    @utils.services('network')
     def test_update_security_group_with_invalid_sg_name(self):
         # Update security_group with invalid sg_name should fail
         securitygroup = self.create_security_group()
@@ -165,7 +155,6 @@
     @testtools.skipIf(CONF.service_available.neutron,
                       "Neutron does not check the security group description")
     @decorators.attr(type=['negative'])
-    @utils.services('network')
     def test_update_security_group_with_invalid_sg_des(self):
         # Update security_group with invalid sg_des should fail
         securitygroup = self.create_security_group()
@@ -178,7 +167,6 @@
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('27edee9c-873d-4da6-a68a-3c256efebe8f')
-    @utils.services('network')
     def test_update_non_existent_security_group(self):
         # Update a non-existent Security Group should Fail
         non_exist_id = self.generate_random_security_group_id()
diff --git a/tempest/api/compute/volumes/test_attach_volume.py b/tempest/api/compute/volumes/test_attach_volume.py
index 502bc1b..e0fed58 100644
--- a/tempest/api/compute/volumes/test_attach_volume.py
+++ b/tempest/api/compute/volumes/test_attach_volume.py
@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import testtools
-
 from tempest.api.compute import base
 from tempest.common import compute
 from tempest.common.utils.linux import remote_client
@@ -143,6 +141,10 @@
             self.assertEqual(server['id'], body['serverId'])
             self.assertEqual(attachment['volumeId'], body['volumeId'])
             self.assertEqual(attachment['id'], body['id'])
+            self.servers_client.detach_volume(server['id'],
+                                              attachment['volumeId'])
+            waiters.wait_for_volume_resource_status(
+                self.volumes_client, attachment['volumeId'], 'available')
 
 
 class AttachVolumeShelveTestJSON(AttachVolumeTestJSON):
@@ -155,6 +157,12 @@
     min_microversion = '2.20'
     max_microversion = 'latest'
 
+    @classmethod
+    def skip_checks(cls):
+        super(AttachVolumeShelveTestJSON, cls).skip_checks()
+        if not CONF.compute_feature_enabled.shelve:
+            raise cls.skipException('Shelve is not available.')
+
     def _count_volumes(self, server):
         # Count number of volumes on an instance
         volumes = 0
@@ -202,8 +210,6 @@
             self.assertEqual(number_of_volumes, counted_volumes)
 
     @decorators.idempotent_id('13a940b6-3474-4c3c-b03f-29b89112bfee')
-    @testtools.skipUnless(CONF.compute_feature_enabled.shelve,
-                          'Shelve is not available.')
     def test_attach_volume_shelved_or_offload_server(self):
         # Create server, count number of volumes on it, shelve
         # server and attach pre-created volume to shelved server
@@ -229,8 +235,6 @@
         self.assertIsNotNone(volume_attachment['device'])
 
     @decorators.idempotent_id('b54e86dd-a070-49c4-9c07-59ae6dae15aa')
-    @testtools.skipUnless(CONF.compute_feature_enabled.shelve,
-                          'Shelve is not available.')
     def test_detach_volume_shelved_or_offload_server(self):
         # Count number of volumes on instance, shelve
         # server and attach pre-created volume to shelved server
diff --git a/tempest/api/compute/volumes/test_volume_snapshots.py b/tempest/api/compute/volumes/test_volume_snapshots.py
index 0f436eb..b8ca81d 100644
--- a/tempest/api/compute/volumes/test_volume_snapshots.py
+++ b/tempest/api/compute/volumes/test_volume_snapshots.py
@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import testtools
-
 from tempest.api.compute import base
 from tempest.common import waiters
 from tempest import config
@@ -38,6 +36,9 @@
         if not CONF.service_available.cinder:
             skip_msg = ("%s skipped as Cinder is not available" % cls.__name__)
             raise cls.skipException(skip_msg)
+        if not CONF.volume_feature_enabled.snapshot:
+            skip_msg = ("Cinder volume snapshots are disabled")
+            raise cls.skipException(skip_msg)
 
     @classmethod
     def setup_clients(cls):
@@ -46,8 +47,6 @@
         cls.snapshots_client = cls.snapshots_extensions_client
 
     @decorators.idempotent_id('cd4ec87d-7825-450d-8040-6e2068f2da8f')
-    @testtools.skipUnless(CONF.volume_feature_enabled.snapshot,
-                          'Cinder volume snapshots are disabled')
     def test_volume_snapshot_create_get_list_delete(self):
         volume = self.create_volume()
         self.addCleanup(self.delete_volume, volume['id'])
diff --git a/tempest/api/network/test_networks.py b/tempest/api/network/test_networks.py
index 206d1a8..88340c1 100644
--- a/tempest/api/network/test_networks.py
+++ b/tempest/api/network/test_networks.py
@@ -374,22 +374,36 @@
     @testtools.skipUnless(CONF.network.public_network_id,
                           'The public_network_id option must be specified.')
     def test_external_network_visibility(self):
-        """Verifies user can see external networks but not subnets."""
+        public_network_id = CONF.network.public_network_id
+
+        # find external network matching public_network_id
         body = self.networks_client.list_networks(**{'router:external': True})
-        networks = [network['id'] for network in body['networks']]
-        self.assertNotEmpty(networks, "No external networks found")
+        external_network = next((network for network in body['networks']
+                                 if network['id'] == public_network_id), None)
+        self.assertIsNotNone(external_network, "Public network %s not found "
+                                               "in external network list"
+                             % public_network_id)
 
         nonexternal = [net for net in body['networks'] if
                        not net['router:external']]
         self.assertEmpty(nonexternal, "Found non-external networks"
                                       " in filtered list (%s)." % nonexternal)
-        self.assertIn(CONF.network.public_network_id, networks)
+
         # only check the public network ID because the other networks may
         # belong to other tests and their state may have changed during this
         # test
-        body = self.subnets_client.list_subnets(
-            network_id=CONF.network.public_network_id)
-        self.assertEmpty(body['subnets'], "Public subnets visible")
+        body = self.subnets_client.list_subnets(network_id=public_network_id)
+
+        # check subnet visibility of external_network
+        if external_network['shared']:
+            self.assertNotEmpty(body['subnets'], "Subnets should be visible "
+                                                 "for shared public network %s"
+                                % public_network_id)
+        else:
+            self.assertEmpty(body['subnets'], "Subnets should not be visible "
+                                              "for non-shared public "
+                                              "network %s"
+                             % public_network_id)
 
     @decorators.idempotent_id('c72c1c0c-2193-4aca-ccc4-b1442640bbbb')
     @utils.requires_ext(extension="standard-attr-description",
diff --git a/tempest/api/volume/admin/test_volumes_backup.py b/tempest/api/volume/admin/test_volumes_backup.py
index afc3281..375aacb 100644
--- a/tempest/api/volume/admin/test_volumes_backup.py
+++ b/tempest/api/volume/admin/test_volumes_backup.py
@@ -99,8 +99,7 @@
                                                 'available')
 
         # Verify Import Backup
-        backups = self.admin_backups_client.list_backups(
-            detail=True)['backups']
+        backups = self.admin_backups_client.list_backups()['backups']
         self.assertIn(new_id, [b['id'] for b in backups])
 
         # Restore backup
diff --git a/tempest/api/volume/test_volumes_backup.py b/tempest/api/volume/test_volumes_backup.py
index f2d8801..1e240b8 100644
--- a/tempest/api/volume/test_volumes_backup.py
+++ b/tempest/api/volume/test_volumes_backup.py
@@ -83,6 +83,9 @@
         # Get all backups with detail
         backups = self.backups_client.list_backups(
             detail=True)['backups']
+        for backup_info in backups:
+            self.assertIn('created_at', backup_info)
+            self.assertIn('links', backup_info)
         self.assertIn((backup['name'], backup['id']),
                       [(m['name'], m['id']) for m in backups])
 
diff --git a/tempest/test.py b/tempest/test.py
index f390ae4..a4cc2cc 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -220,10 +220,13 @@
         resource_setup or at test level.
         """
         identity_version = cls.get_identity_version()
-        if 'admin' in cls.credentials and not credentials.is_admin_available(
-                identity_version=identity_version):
-            msg = "Missing Identity Admin API credentials in configuration."
-            raise cls.skipException(msg)
+        # setting force_tenant_isolation to True also needs admin credentials.
+        if ('admin' in cls.credentials or
+                getattr(cls, 'force_tenant_isolation', False)):
+            if not credentials.is_admin_available(
+                    identity_version=identity_version):
+                raise cls.skipException(
+                    "Missing Identity Admin API credentials in configuration.")
         if 'alt' in cls.credentials and not credentials.is_alt_available(
                 identity_version=identity_version):
             msg = "Missing a 2nd set of API credentials in configuration."