diff --git a/tempest/api/identity/admin/test_roles.py b/tempest/api/identity/admin/test_roles.py
index d87d5c1..fabc0ed 100644
--- a/tempest/api/identity/admin/test_roles.py
+++ b/tempest/api/identity/admin/test_roles.py
@@ -105,7 +105,3 @@
         self.client.assign_user_role(tenant['id'], user['id'], role['id'])
         _, roles = self.client.list_user_roles(tenant['id'], user['id'])
         self.assert_role_in_role_list(role, roles)
-
-
-class RolesTestXML(RolesTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_roles_negative.py b/tempest/api/identity/admin/test_roles_negative.py
index 37a981e..d0eb334 100644
--- a/tempest/api/identity/admin/test_roles_negative.py
+++ b/tempest/api/identity/admin/test_roles_negative.py
@@ -223,7 +223,3 @@
                               user['id'])
         finally:
             self.client.auth_provider.clear_auth()
-
-
-class RolesTestXML(RolesNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_services.py b/tempest/api/identity/admin/test_services.py
index a9782a9..b8f09ad 100644
--- a/tempest/api/identity/admin/test_services.py
+++ b/tempest/api/identity/admin/test_services.py
@@ -98,7 +98,3 @@
         _, body = self.client.list_services()
         found = [serv for serv in body if serv['id'] in service_ids]
         self.assertEqual(len(found), len(services), 'Services not found')
-
-
-class ServicesTestXML(ServicesTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_tenant_negative.py b/tempest/api/identity/admin/test_tenant_negative.py
index dcfacee..57a2fec 100644
--- a/tempest/api/identity/admin/test_tenant_negative.py
+++ b/tempest/api/identity/admin/test_tenant_negative.py
@@ -135,7 +135,3 @@
         self.assertRaises(exceptions.Unauthorized, self.client.update_tenant,
                           tenant['id'])
         self.client.auth_provider.clear_auth()
-
-
-class TenantsNegativeTestXML(TenantsNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_tenants.py b/tempest/api/identity/admin/test_tenants.py
index 8d3b402..778bd5c 100644
--- a/tempest/api/identity/admin/test_tenants.py
+++ b/tempest/api/identity/admin/test_tenants.py
@@ -178,7 +178,3 @@
 
         self.client.delete_tenant(t_id)
         self.data.tenants.remove(tenant)
-
-
-class TenantsTestXML(TenantsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_tokens.py b/tempest/api/identity/admin/test_tokens.py
index 2c5fb74..bfdc7d6 100644
--- a/tempest/api/identity/admin/test_tokens.py
+++ b/tempest/api/identity/admin/test_tokens.py
@@ -104,7 +104,3 @@
         # Use the unscoped token to get a token scoped to tenant2
         _, body = self.token_client.auth_token(token_id,
                                                tenant=tenant2_name)
-
-
-class TokensTestXML(TokensTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_users.py b/tempest/api/identity/admin/test_users.py
index 66a1737..84a8103 100644
--- a/tempest/api/identity/admin/test_users.py
+++ b/tempest/api/identity/admin/test_users.py
@@ -206,7 +206,3 @@
         _, body = self.token_client.auth(self.data.test_user, new_pass,
                                          self.data.test_tenant)
         self.assertTrue('id' in body['token'])
-
-
-class UsersTestXML(UsersTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/test_users_negative.py b/tempest/api/identity/admin/test_users_negative.py
index bad2b89..c039da6 100644
--- a/tempest/api/identity/admin/test_users_negative.py
+++ b/tempest/api/identity/admin/test_users_negative.py
@@ -227,7 +227,3 @@
         for invalid in invalid_id:
             self.assertRaises(exceptions.NotFound,
                               self.client.list_users_for_tenant, invalid)
-
-
-class UsersNegativeTestXML(UsersNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_credentials.py b/tempest/api/identity/admin/v3/test_credentials.py
index 7a0edb0..9b30166 100644
--- a/tempest/api/identity/admin/v3/test_credentials.py
+++ b/tempest/api/identity/admin/v3/test_credentials.py
@@ -105,7 +105,3 @@
         self.assertEqual(0, len(missing_creds),
                          "Failed to find cred %s in fetched list" %
                          ', '.join(m_cred for m_cred in missing_creds))
-
-
-class CredentialsTestXML(CredentialsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_domains.py b/tempest/api/identity/admin/v3/test_domains.py
index 5b73df1..286ef97 100644
--- a/tempest/api/identity/admin/v3/test_domains.py
+++ b/tempest/api/identity/admin/v3/test_domains.py
@@ -85,7 +85,3 @@
         self.assertEqual(new_name, fetched_domain['name'])
         self.assertEqual(new_desc, fetched_domain['description'])
         self.assertEqual('true', str(fetched_domain['enabled']).lower())
-
-
-class DomainsTestXML(DomainsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_endpoints.py b/tempest/api/identity/admin/v3/test_endpoints.py
index 676f101..6044d2b 100644
--- a/tempest/api/identity/admin/v3/test_endpoints.py
+++ b/tempest/api/identity/admin/v3/test_endpoints.py
@@ -122,7 +122,3 @@
         self.assertEqual(url2, endpoint['url'])
         self.assertEqual(region2, endpoint['region'])
         self.assertEqual('false', str(endpoint['enabled']).lower())
-
-
-class EndPointsTestXML(EndPointsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_endpoints_negative.py b/tempest/api/identity/admin/v3/test_endpoints_negative.py
index b987d12..4308d44 100644
--- a/tempest/api/identity/admin/v3/test_endpoints_negative.py
+++ b/tempest/api/identity/admin/v3/test_endpoints_negative.py
@@ -88,7 +88,3 @@
     def test_update_with_enabled_True(self):
         # Enabled should be a boolean, not a string like 'True'
         self._assert_update_raises_bad_request('True')
-
-
-class EndpointsNegativeTestXML(EndpointsNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_groups.py b/tempest/api/identity/admin/v3/test_groups.py
index 987a9d5..3f2069d 100644
--- a/tempest/api/identity/admin/v3/test_groups.py
+++ b/tempest/api/identity/admin/v3/test_groups.py
@@ -91,7 +91,3 @@
         _, user_groups = self.client.list_user_groups(user['id'])
         self.assertEqual(sorted(groups), sorted(user_groups))
         self.assertEqual(2, len(user_groups))
-
-
-class GroupsV3TestXML(GroupsV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_list_projects.py b/tempest/api/identity/admin/v3/test_list_projects.py
index be06c7f..2065de3 100644
--- a/tempest/api/identity/admin/v3/test_list_projects.py
+++ b/tempest/api/identity/admin/v3/test_list_projects.py
@@ -67,7 +67,3 @@
         resp, body = self.client.list_projects(params)
         self.assertIn(self.p1[key], map(lambda x: x[key], body))
         self.assertNotIn(self.p2[key], map(lambda x: x[key], body))
-
-
-class ListProjectsTestXML(ListProjectsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_list_users.py b/tempest/api/identity/admin/v3/test_list_users.py
index 903ad5c..70c8ec6 100644
--- a/tempest/api/identity/admin/v3/test_list_users.py
+++ b/tempest/api/identity/admin/v3/test_list_users.py
@@ -94,7 +94,3 @@
         self.assertEqual(self.data.v3_users[0]['name'], user['name'])
         self.assertEqual(self.alt_email, user['email'])
         self.assertEqual(self.data.domain['id'], user['domain_id'])
-
-
-class UsersV3TestXML(UsersV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_policies.py b/tempest/api/identity/admin/v3/test_policies.py
index 65c5230..9ea61df 100644
--- a/tempest/api/identity/admin/v3/test_policies.py
+++ b/tempest/api/identity/admin/v3/test_policies.py
@@ -70,7 +70,3 @@
         self.assertEqual(fetched_policy['id'], policy['id'])
         self.assertEqual(fetched_policy['blob'], policy['blob'])
         self.assertEqual(update_type, fetched_policy['type'])
-
-
-class PoliciesTestXML(PoliciesTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_projects.py b/tempest/api/identity/admin/v3/test_projects.py
index 5890eab..e7fd2b5 100644
--- a/tempest/api/identity/admin/v3/test_projects.py
+++ b/tempest/api/identity/admin/v3/test_projects.py
@@ -176,7 +176,3 @@
         self.assertEqual(project['id'],
                          new_user_get['project_id'])
         self.assertEqual(u_email, new_user_get['email'])
-
-
-class ProjectsTestXML(ProjectsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_projects_negative.py b/tempest/api/identity/admin/v3/test_projects_negative.py
index 9e8f613..da35ace 100644
--- a/tempest/api/identity/admin/v3/test_projects_negative.py
+++ b/tempest/api/identity/admin/v3/test_projects_negative.py
@@ -74,7 +74,3 @@
         # Attempt to delete a non existent project should fail
         self.assertRaises(exceptions.NotFound, self.client.delete_project,
                           data_utils.rand_uuid_hex())
-
-
-class ProjectsNegativeTestXML(ProjectsNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_regions.py b/tempest/api/identity/admin/v3/test_regions.py
index c5d5824..4305060 100644
--- a/tempest/api/identity/admin/v3/test_regions.py
+++ b/tempest/api/identity/admin/v3/test_regions.py
@@ -89,7 +89,3 @@
         self.assertEqual(0, len(missing_regions),
                          "Failed to find region %s in fetched list" %
                          ', '.join(str(e) for e in missing_regions))
-
-
-class RegionsTestXML(RegionsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_roles.py b/tempest/api/identity/admin/v3/test_roles.py
index 5e14a04..3c0a180 100644
--- a/tempest/api/identity/admin/v3/test_roles.py
+++ b/tempest/api/identity/admin/v3/test_roles.py
@@ -173,7 +173,3 @@
         _, body = self.client.list_roles()
         found = [role for role in body if role in self.data.v3_roles]
         self.assertEqual(len(found), len(self.data.v3_roles))
-
-
-class RolesV3TestXML(RolesV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_services.py b/tempest/api/identity/admin/v3/test_services.py
index 7e21cc3..a871f17 100644
--- a/tempest/api/identity/admin/v3/test_services.py
+++ b/tempest/api/identity/admin/v3/test_services.py
@@ -91,7 +91,3 @@
         fetched_ids = [service['id'] for service in services]
         found = [s for s in fetched_ids if s in service_ids]
         self.assertEqual(len(found), len(service_ids))
-
-
-class ServicesTestXML(ServicesTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_tokens.py b/tempest/api/identity/admin/v3/test_tokens.py
index 230e09f..aef8239 100644
--- a/tempest/api/identity/admin/v3/test_tokens.py
+++ b/tempest/api/identity/admin/v3/test_tokens.py
@@ -145,7 +145,3 @@
                          token_auth['token']['project']['id'])
         self.assertEqual(project2['name'],
                          token_auth['token']['project']['name'])
-
-
-class TokensV3TestXML(TokensV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/admin/v3/test_users.py b/tempest/api/identity/admin/v3/test_users.py
index 898bcd0..1b003c3 100644
--- a/tempest/api/identity/admin/v3/test_users.py
+++ b/tempest/api/identity/admin/v3/test_users.py
@@ -144,7 +144,3 @@
         self.data.setup_test_v3_user()
         _, user = self.client.get_user(self.data.v3_user['id'])
         self.assertEqual(self.data.v3_user['id'], user['id'])
-
-
-class UsersV3TestXML(UsersV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/identity/base.py b/tempest/api/identity/base.py
index 244323e..1e4973b 100644
--- a/tempest/api/identity/base.py
+++ b/tempest/api/identity/base.py
@@ -31,9 +31,6 @@
     @classmethod
     def resource_setup(cls):
         super(BaseIdentityAdminTest, cls).resource_setup()
-        if getattr(cls, '_interface', None) == 'xml':
-            if not CONF.identity_feature_enabled.xml_api:
-                raise cls.skipException('XML API is not enabled')
         cls.os_adm = clients.AdminManager(interface=cls._interface)
         cls.os = clients.Manager(interface=cls._interface)
 
diff --git a/tempest/api/identity/test_extension.py b/tempest/api/identity/test_extension.py
index a06ee53..829628a 100644
--- a/tempest/api/identity/test_extension.py
+++ b/tempest/api/identity/test_extension.py
@@ -30,7 +30,3 @@
         for value in body:
             for key in keys:
                 self.assertIn(key, value)
-
-
-class ExtensionTestXML(ExtensionTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/admin/test_agent_management.py b/tempest/api/network/admin/test_agent_management.py
index 0d27afa..53b9ddd 100644
--- a/tempest/api/network/admin/test_agent_management.py
+++ b/tempest/api/network/admin/test_agent_management.py
@@ -83,7 +83,3 @@
         origin_agent = {'description': description}
         self.admin_client.update_agent(agent_id=self.agent['id'],
                                        agent_info=origin_agent)
-
-
-class AgentManagementTestXML(AgentManagementTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/admin/test_dhcp_agent_scheduler.py b/tempest/api/network/admin/test_dhcp_agent_scheduler.py
index 78f211d..a938fa6 100644
--- a/tempest/api/network/admin/test_dhcp_agent_scheduler.py
+++ b/tempest/api/network/admin/test_dhcp_agent_scheduler.py
@@ -93,7 +93,3 @@
                                                               network_id)
         self.assertTrue(self._check_network_in_dhcp_agent(
             network_id, agent))
-
-
-class DHCPAgentSchedulersTestXML(DHCPAgentSchedulersTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/admin/test_external_network_extension.py b/tempest/api/network/admin/test_external_network_extension.py
index 5e6d8f3..75ee217 100644
--- a/tempest/api/network/admin/test_external_network_extension.py
+++ b/tempest/api/network/admin/test_external_network_extension.py
@@ -118,7 +118,3 @@
                          (s['id'] for s in subnet_list))
         # Removes subnet from the cleanup list
         self.subnets.remove(subnet)
-
-
-class ExternalNetworksTestXML(ExternalNetworksTestJSON):
-    _interface = 'xml'
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 46c5e76..2fe7bf8 100644
--- a/tempest/api/network/admin/test_floating_ips_admin_actions.py
+++ b/tempest/api/network/admin/test_floating_ips_admin_actions.py
@@ -63,7 +63,3 @@
         self.assertNotIn(floating_ip_admin['floatingip']['id'],
                          floating_ip_ids)
         self.assertNotIn(floating_ip_alt['id'], floating_ip_ids)
-
-
-class FloatingIPAdminTestXML(FloatingIPAdminTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/admin/test_l3_agent_scheduler.py b/tempest/api/network/admin/test_l3_agent_scheduler.py
index 567af24..8fccb1f 100644
--- a/tempest/api/network/admin/test_l3_agent_scheduler.py
+++ b/tempest/api/network/admin/test_l3_agent_scheduler.py
@@ -76,7 +76,3 @@
             router['router']['id'])
         # NOTE(afazekas): The deletion not asserted, because neutron
         # is not forbidden to reschedule the router to the same agent
-
-
-class L3AgentSchedulerTestXML(L3AgentSchedulerTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/admin/test_lbaas_agent_scheduler.py b/tempest/api/network/admin/test_lbaas_agent_scheduler.py
index 1476f30..03296a4 100644
--- a/tempest/api/network/admin/test_lbaas_agent_scheduler.py
+++ b/tempest/api/network/admin/test_lbaas_agent_scheduler.py
@@ -69,7 +69,3 @@
         _, body = self.admin_client.show_lbaas_agent_hosting_pool(
             self.pool['id'])
         self.assertEqual('Loadbalancer agent', body['agent']['agent_type'])
-
-
-class LBaaSAgentSchedulerTestXML(LBaaSAgentSchedulerTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/admin/test_load_balancer_admin_actions.py b/tempest/api/network/admin/test_load_balancer_admin_actions.py
index 6d115e8..15d06e3 100644
--- a/tempest/api/network/admin/test_load_balancer_admin_actions.py
+++ b/tempest/api/network/admin/test_load_balancer_admin_actions.py
@@ -109,7 +109,3 @@
         self.addCleanup(self.admin_client.delete_member, member['id'])
         self.assertIsNotNone(member['id'])
         self.assertEqual(self.tenant_id, member['tenant_id'])
-
-
-class LoadBalancerAdminTestXML(LoadBalancerAdminTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_allowed_address_pair.py b/tempest/api/network/test_allowed_address_pair.py
index a1166c8..7b7a5db 100644
--- a/tempest/api/network/test_allowed_address_pair.py
+++ b/tempest/api/network/test_allowed_address_pair.py
@@ -129,7 +129,3 @@
 
 class AllowedAddressPairIpV6TestJSON(AllowedAddressPairTestJSON):
     _ip_version = 6
-
-
-class AllowedAddressPairTestXML(AllowedAddressPairTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_extensions.py b/tempest/api/network/test_extensions.py
index 715136c..1c7feb3 100644
--- a/tempest/api/network/test_extensions.py
+++ b/tempest/api/network/test_extensions.py
@@ -73,7 +73,3 @@
         for e in expected_alias:
             if test.is_extension_enabled(e, 'network'):
                 self.assertIn(e, actual_alias)
-
-
-class ExtensionsTestXML(ExtensionsTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_floating_ips.py b/tempest/api/network/test_floating_ips.py
index 52672ea..9beae0a 100644
--- a/tempest/api/network/test_floating_ips.py
+++ b/tempest/api/network/test_floating_ips.py
@@ -213,7 +213,3 @@
         update_floating_ip = body['floatingip']
         self.assertEqual(update_floating_ip['fixed_ip_address'],
                          list_ips[1])
-
-
-class FloatingIPTestXML(FloatingIPTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_fwaas_extensions.py b/tempest/api/network/test_fwaas_extensions.py
index 8e2b7f5..12b8887 100644
--- a/tempest/api/network/test_fwaas_extensions.py
+++ b/tempest/api/network/test_fwaas_extensions.py
@@ -254,7 +254,3 @@
             fw_policy_id)
         return [ruleid for ruleid in fw_policy['firewall_policy']
                 ['firewall_rules']]
-
-
-class FWaaSExtensionTestXML(FWaaSExtensionTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_load_balancer.py b/tempest/api/network/test_load_balancer.py
index 8b8e3b1..41294f6 100644
--- a/tempest/api/network/test_load_balancer.py
+++ b/tempest/api/network/test_load_balancer.py
@@ -424,7 +424,3 @@
 
 class LoadBalancerIpV6TestJSON(LoadBalancerTestJSON):
     _ip_version = 6
-
-
-class LoadBalancerTestXML(LoadBalancerTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_metering_extensions.py b/tempest/api/network/test_metering_extensions.py
index 07ebd8c..daf9948 100644
--- a/tempest/api/network/test_metering_extensions.py
+++ b/tempest/api/network/test_metering_extensions.py
@@ -147,7 +147,3 @@
 
 class MeteringIpV6JSON(MeteringJSON):
     _ip_version = 6
-
-
-class MeteringXML(MeteringJSON):
-    interface = 'xml'
diff --git a/tempest/api/network/test_networks.py b/tempest/api/network/test_networks.py
index be23a82..ccc489e 100644
--- a/tempest/api/network/test_networks.py
+++ b/tempest/api/network/test_networks.py
@@ -370,10 +370,6 @@
         self.assertEmpty(subnets, "Public subnets visible")
 
 
-class NetworksTestXML(NetworksTestJSON):
-    _interface = 'xml'
-
-
 class BulkNetworkOpsTestJSON(base.BaseNetworkTest):
     _interface = 'json'
 
@@ -495,10 +491,6 @@
             self.assertIn(n['id'], ports_list)
 
 
-class BulkNetworkOpsTestXML(BulkNetworkOpsTestJSON):
-    _interface = 'xml'
-
-
 class NetworksIpV6TestJSON(NetworksTestJSON):
     _ip_version = 6
 
@@ -577,7 +569,3 @@
         self._create_verify_delete_subnet(
             ipv6_ra_mode='dhcpv6-stateless',
             ipv6_address_mode='dhcpv6-stateless')
-
-
-class NetworksIpV6TestXML(NetworksIpV6TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_networks_negative.py b/tempest/api/network/test_networks_negative.py
index 53dfc52..bc3ab68 100644
--- a/tempest/api/network/test_networks_negative.py
+++ b/tempest/api/network/test_networks_negative.py
@@ -52,7 +52,3 @@
         non_exist_id = data_utils.rand_name('network')
         self.assertRaises(exceptions.NotFound, self.client.delete_network,
                           non_exist_id)
-
-
-class NetworksNegativeTestXML(NetworksNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_ports.py b/tempest/api/network/test_ports.py
index 7c5bdfe..d30c7dc 100644
--- a/tempest/api/network/test_ports.py
+++ b/tempest/api/network/test_ports.py
@@ -187,10 +187,6 @@
              data_utils.rand_name('secgroup')])
 
 
-class PortsTestXML(PortsTestJSON):
-    _interface = 'xml'
-
-
 class PortsAdminExtendedAttrsTestJSON(base.BaseAdminNetworkTest):
     _interface = 'json'
 
@@ -267,25 +263,13 @@
                          show_port['binding:vif_details'])
 
 
-class PortsAdminExtendedAttrsTestXML(PortsAdminExtendedAttrsTestJSON):
-    _interface = 'xml'
-
-
 class PortsIpV6TestJSON(PortsTestJSON):
     _ip_version = 6
     _tenant_network_cidr = CONF.network.tenant_network_v6_cidr
     _tenant_network_mask_bits = CONF.network.tenant_network_v6_mask_bits
 
 
-class PortsIpV6TestXML(PortsIpV6TestJSON):
-    _interface = 'xml'
-
-
 class PortsAdminExtendedAttrsIpV6TestJSON(PortsAdminExtendedAttrsTestJSON):
     _ip_version = 6
     _tenant_network_cidr = CONF.network.tenant_network_v6_cidr
     _tenant_network_mask_bits = CONF.network.tenant_network_v6_mask_bits
-
-
-class PortsAdminExtendedAttrsIpV6TestXML(PortsAdminExtendedAttrsIpV6TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_security_groups.py b/tempest/api/network/test_security_groups.py
index 40cf04f..b995b1d 100644
--- a/tempest/api/network/test_security_groups.py
+++ b/tempest/api/network/test_security_groups.py
@@ -231,14 +231,6 @@
         self.assertEqual(int(sec_group_rule['protocol']), protocol)
 
 
-class SecGroupTestXML(SecGroupTest):
-    _interface = 'xml'
-
-
 class SecGroupIPv6Test(SecGroupTest):
     _ip_version = 6
     _tenant_network_cidr = CONF.network.tenant_network_v6_cidr
-
-
-class SecGroupIPv6TestXML(SecGroupIPv6Test):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_security_groups_negative.py b/tempest/api/network/test_security_groups_negative.py
index 42f7f71..4626aae 100644
--- a/tempest/api/network/test_security_groups_negative.py
+++ b/tempest/api/network/test_security_groups_negative.py
@@ -189,14 +189,6 @@
                           direction='ingress', ethertype=self.ethertype)
 
 
-class NegativeSecGroupTestXML(NegativeSecGroupTest):
-    _interface = 'xml'
-
-
 class NegativeSecGroupIPv6Test(NegativeSecGroupTest):
     _ip_version = 6
     _tenant_network_cidr = CONF.network.tenant_network_v6_cidr
-
-
-class NegativeSecGroupIPv6TestXML(NegativeSecGroupIPv6Test):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_service_type_management.py b/tempest/api/network/test_service_type_management.py
index 302069f..6695f47 100644
--- a/tempest/api/network/test_service_type_management.py
+++ b/tempest/api/network/test_service_type_management.py
@@ -28,7 +28,3 @@
     def test_service_provider_list(self):
         _, body = self.client.list_service_providers()
         self.assertIsInstance(body['service_providers'], list)
-
-
-class ServiceTypeManagementTestXML(ServiceTypeManagementTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/network/test_vpnaas_extensions.py b/tempest/api/network/test_vpnaas_extensions.py
index 96b9804..46f10c4 100644
--- a/tempest/api/network/test_vpnaas_extensions.py
+++ b/tempest/api/network/test_vpnaas_extensions.py
@@ -313,7 +313,3 @@
         _, body = self.client.show_ipsecpolicy(self.ipsecpolicy['id'])
         ipsecpolicy = body['ipsecpolicy']
         self._assertExpected(self.ipsecpolicy, ipsecpolicy)
-
-
-class VPNaaSTestXML(VPNaaSTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/telemetry/test_telemetry_notification_api.py b/tempest/api/telemetry/test_telemetry_notification_api.py
index 42e2a2d..7267183 100644
--- a/tempest/api/telemetry/test_telemetry_notification_api.py
+++ b/tempest/api/telemetry/test_telemetry_notification_api.py
@@ -73,7 +73,3 @@
 
         for metric in self.glance_v2_notifications:
             self.await_samples(metric, query)
-
-
-class TelemetryNotificationAPITestXML(TelemetryNotificationAPITestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/volume/admin/test_snapshots_actions.py b/tempest/api/volume/admin/test_snapshots_actions.py
index 02a2526..31dc09f 100644
--- a/tempest/api/volume/admin/test_snapshots_actions.py
+++ b/tempest/api/volume/admin/test_snapshots_actions.py
@@ -128,11 +128,3 @@
 
 class SnapshotsActionsV1Test(SnapshotsActionsV2Test):
     _api_version = 1
-
-
-class SnapshotsActionsV1TestXML(SnapshotsActionsV1Test):
-    _interface = "xml"
-
-    def _get_progress_alias(self):
-        return '{http://docs.openstack.org/volume/ext' \
-               '/extended_snapshot_attributes/api/v1}progress'
diff --git a/tempest/api/volume/admin/test_volume_hosts.py b/tempest/api/volume/admin/test_volume_hosts.py
index c92a60c..e966613 100644
--- a/tempest/api/volume/admin/test_volume_hosts.py
+++ b/tempest/api/volume/admin/test_volume_hosts.py
@@ -29,7 +29,3 @@
 
 class VolumeHostsAdminV1TestsJSON(VolumeHostsAdminV2TestsJSON):
     _api_version = 1
-
-
-class VolumeHostsAdminV1TestsXML(VolumeHostsAdminV1TestsJSON):
-    _interface = 'xml'
diff --git a/tempest/api/volume/admin/test_volume_quotas.py b/tempest/api/volume/admin/test_volume_quotas.py
index 6e45b0f..0cc2471 100644
--- a/tempest/api/volume/admin/test_volume_quotas.py
+++ b/tempest/api/volume/admin/test_volume_quotas.py
@@ -113,7 +113,3 @@
         self.quotas_client.delete_quota_set(tenant_id)
         _, quota_set_new = self.quotas_client.get_quota_set(tenant_id)
         self.assertEqual(volume_default, quota_set_new['volumes'])
-
-
-class VolumeQuotasAdminTestXML(VolumeQuotasAdminTestJSON):
-    _interface = "xml"
diff --git a/tempest/api/volume/admin/test_volume_quotas_negative.py b/tempest/api/volume/admin/test_volume_quotas_negative.py
index 60a0adb..0fff561 100644
--- a/tempest/api/volume/admin/test_volume_quotas_negative.py
+++ b/tempest/api/volume/admin/test_volume_quotas_negative.py
@@ -76,7 +76,3 @@
         self.assertRaises(exceptions.OverLimit,
                           self.snapshots_client.create_snapshot,
                           self.volume['id'])
-
-
-class VolumeQuotasNegativeTestXML(VolumeQuotasNegativeTestJSON):
-    _interface = "xml"
diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
index e474aa0..40af37e 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
@@ -142,7 +142,3 @@
 
 class ExtraSpecsNegativeV1Test(ExtraSpecsNegativeV2Test):
     _api_version = 1
-
-
-class ExtraSpecsNegativeV1TestXML(ExtraSpecsNegativeV1Test):
-    _interface = 'xml'
diff --git a/tempest/api/volume/admin/test_volume_types_negative.py b/tempest/api/volume/admin/test_volume_types_negative.py
index 9c9913f..4144270 100644
--- a/tempest/api/volume/admin/test_volume_types_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_negative.py
@@ -56,7 +56,3 @@
 
 class VolumeTypesNegativeV1Test(VolumeTypesNegativeV2Test):
     _api_version = 1
-
-
-class VolumeTypesNegativeV1TestXML(VolumeTypesNegativeV1Test):
-    _interface = 'xml'
diff --git a/tempest/api/volume/admin/test_volumes_actions.py b/tempest/api/volume/admin/test_volumes_actions.py
index 1c3e04a..8db6106 100644
--- a/tempest/api/volume/admin/test_volumes_actions.py
+++ b/tempest/api/volume/admin/test_volumes_actions.py
@@ -97,7 +97,3 @@
 
 class VolumesActionsV1Test(VolumesActionsV2Test):
     _api_version = 1
-
-
-class VolumesActionsV1TestXML(VolumesActionsV1Test):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_availability_zone.py b/tempest/api/volume/test_availability_zone.py
index 648bd8b..c3d5d02 100644
--- a/tempest/api/volume/test_availability_zone.py
+++ b/tempest/api/volume/test_availability_zone.py
@@ -35,13 +35,5 @@
         self.assertTrue(len(availability_zone) > 0)
 
 
-class AvailabilityZoneV2TestXML(AvailabilityZoneV2TestJSON):
-    _interface = 'xml'
-
-
 class AvailabilityZoneV1TestJSON(AvailabilityZoneV2TestJSON):
     _api_version = 1
-
-
-class AvailabilityZoneV1TestXML(AvailabilityZoneV1TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/volume/test_extensions.py b/tempest/api/volume/test_extensions.py
index 4fc6ee4..66ea9b7 100644
--- a/tempest/api/volume/test_extensions.py
+++ b/tempest/api/volume/test_extensions.py
@@ -44,13 +44,5 @@
             raise self.skipException('There are not any extensions configured')
 
 
-class ExtensionsV2TestXML(ExtensionsV2TestJSON):
-    _interface = 'xml'
-
-
 class ExtensionsV1TestJSON(ExtensionsV2TestJSON):
     _api_version = 1
-
-
-class ExtensionsV1TestXML(ExtensionsV1TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/volume/test_snapshot_metadata.py b/tempest/api/volume/test_snapshot_metadata.py
index 777d3de..0dceb3d 100644
--- a/tempest/api/volume/test_snapshot_metadata.py
+++ b/tempest/api/volume/test_snapshot_metadata.py
@@ -98,13 +98,5 @@
         self.assertEqual(expect, body)
 
 
-class SnapshotV2MetadataTestXML(SnapshotV2MetadataTestJSON):
-    _interface = "xml"
-
-
 class SnapshotV1MetadataTestJSON(SnapshotV2MetadataTestJSON):
     _api_version = 1
-
-
-class SnapshotV1MetadataTestXML(SnapshotV1MetadataTestJSON):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volume_metadata.py b/tempest/api/volume/test_volume_metadata.py
index 2ec8667..ac5d016 100644
--- a/tempest/api/volume/test_volume_metadata.py
+++ b/tempest/api/volume/test_volume_metadata.py
@@ -99,13 +99,5 @@
         self.assertThat(body.items(), matchers.ContainsAll(expect.items()))
 
 
-class VolumesV2MetadataTestXML(VolumesV2MetadataTest):
-    _interface = "xml"
-
-
 class VolumesV1MetadataTest(VolumesV2MetadataTest):
     _api_version = 1
-
-
-class VolumesV1MetadataTestXML(VolumesV1MetadataTest):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volume_transfers.py b/tempest/api/volume/test_volume_transfers.py
index fe217c1..2011c1b 100644
--- a/tempest/api/volume/test_volume_transfers.py
+++ b/tempest/api/volume/test_volume_transfers.py
@@ -102,13 +102,5 @@
         self.client.wait_for_volume_status(volume['id'], 'available')
 
 
-class VolumesV2TransfersTestXML(VolumesV2TransfersTest):
-    _interface = "xml"
-
-
 class VolumesV1TransfersTest(VolumesV2TransfersTest):
     _api_version = 1
-
-
-class VolumesV1TransfersTestXML(VolumesV1TransfersTest):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volumes_actions.py b/tempest/api/volume/test_volumes_actions.py
index a9bc70a..4fd27b1 100644
--- a/tempest/api/volume/test_volumes_actions.py
+++ b/tempest/api/volume/test_volumes_actions.py
@@ -142,13 +142,5 @@
         self.assertEqual(False, bool_flag)
 
 
-class VolumesV2ActionsTestXML(VolumesV2ActionsTest):
-    _interface = "xml"
-
-
 class VolumesV1ActionsTest(VolumesV2ActionsTest):
     _api_version = 1
-
-
-class VolumesV1ActionsTestXML(VolumesV1ActionsTest):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volumes_extend.py b/tempest/api/volume/test_volumes_extend.py
index edd497c..2b816ef 100644
--- a/tempest/api/volume/test_volumes_extend.py
+++ b/tempest/api/volume/test_volumes_extend.py
@@ -38,13 +38,5 @@
         self.assertEqual(int(volume['size']), extend_size)
 
 
-class VolumesV2ExtendTestXML(VolumesV2ExtendTest):
-    _interface = "xml"
-
-
 class VolumesV1ExtendTest(VolumesV2ExtendTest):
     _api_version = 1
-
-
-class VolumesV1ExtendTestXML(VolumesV1ExtendTest):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volumes_get.py b/tempest/api/volume/test_volumes_get.py
index 033beb4..a9c10aa 100644
--- a/tempest/api/volume/test_volumes_get.py
+++ b/tempest/api/volume/test_volumes_get.py
@@ -149,13 +149,5 @@
         self._volume_create_get_update_delete(source_volid=origin['id'])
 
 
-class VolumesV2GetTestXML(VolumesV2GetTest):
-    _interface = "xml"
-
-
 class VolumesV1GetTest(VolumesV2GetTest):
     _api_version = 1
-
-
-class VolumesV1GetTestXML(VolumesV1GetTest):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volumes_list.py b/tempest/api/volume/test_volumes_list.py
index 016e9ab..9c0d238 100644
--- a/tempest/api/volume/test_volumes_list.py
+++ b/tempest/api/volume/test_volumes_list.py
@@ -205,14 +205,6 @@
         self._list_by_param_value_and_assert(params, with_detail=True)
 
 
-class VolumesV2ListTestXML(VolumesV2ListTestJSON):
-    _interface = 'xml'
-
-
 class VolumesV1ListTestJSON(VolumesV2ListTestJSON):
     _api_version = 1
     VOLUME_FIELDS = ('id', 'display_name')
-
-
-class VolumesV1ListTestXML(VolumesV1ListTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index 2b43c63..5d3fdef 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -259,14 +259,6 @@
         self.assertEqual(0, len(fetched_volume))
 
 
-class VolumesV2NegativeTestXML(VolumesV2NegativeTest):
-    _interface = 'xml'
-
-
 class VolumesV1NegativeTest(VolumesV2NegativeTest):
     _api_version = 1
     _name = 'display_name'
-
-
-class VolumesV1NegativeTestXML(VolumesV1NegativeTest):
-    _interface = 'xml'
diff --git a/tempest/api/volume/test_volumes_snapshots.py b/tempest/api/volume/test_volumes_snapshots.py
index 78df1df..21d0a86 100644
--- a/tempest/api/volume/test_volumes_snapshots.py
+++ b/tempest/api/volume/test_volumes_snapshots.py
@@ -178,13 +178,5 @@
         self.clear_snapshots()
 
 
-class VolumesV2SnapshotTestXML(VolumesV2SnapshotTestJSON):
-    _interface = "xml"
-
-
 class VolumesV1SnapshotTestJSON(VolumesV2SnapshotTestJSON):
     _api_version = 1
-
-
-class VolumesV1SnapshotTestXML(VolumesV1SnapshotTestJSON):
-    _interface = "xml"
diff --git a/tempest/api/volume/test_volumes_snapshots_negative.py b/tempest/api/volume/test_volumes_snapshots_negative.py
index 75a62a8..2d7b6de 100644
--- a/tempest/api/volume/test_volumes_snapshots_negative.py
+++ b/tempest/api/volume/test_volumes_snapshots_negative.py
@@ -47,13 +47,5 @@
                           None, display_name=s_name)
 
 
-class VolumesV2SnapshotNegativeTestXML(VolumesV2SnapshotNegativeTestJSON):
-    _interface = "xml"
-
-
 class VolumesV1SnapshotNegativeTestJSON(VolumesV2SnapshotNegativeTestJSON):
     _api_version = 1
-
-
-class VolumesV1SnapshotNegativeTestXML(VolumesV1SnapshotNegativeTestJSON):
-    _interface = "xml"
diff --git a/tempest/api/volume/v2/test_volumes_list.py b/tempest/api/volume/v2/test_volumes_list.py
index cc56873..c20f3d8 100644
--- a/tempest/api/volume/v2/test_volumes_list.py
+++ b/tempest/api/volume/v2/test_volumes_list.py
@@ -82,7 +82,3 @@
 
         _list_details_with_multiple_params()
         _list_details_with_multiple_params(sort_dir='desc')
-
-
-class VolumesV2ListTestXML(VolumesV2ListTestJSON):
-    _interface = 'xml'