diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index 9b9eb9f..5539894 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -33,9 +33,6 @@
     @classmethod
     def setUpClass(cls):
         super(BaseComputeTest, cls).setUpClass()
-        if not cls.config.service_available.nova:
-            skip_msg = ("%s skipped as nova is not available" % cls.__name__)
-            raise cls.skipException(skip_msg)
 
         os = cls.get_client_manager()
 
diff --git a/tempest/api/compute/servers/test_server_actions.py b/tempest/api/compute/servers/test_server_actions.py
index 582faf8..d8f2600 100644
--- a/tempest/api/compute/servers/test_server_actions.py
+++ b/tempest/api/compute/servers/test_server_actions.py
@@ -84,7 +84,8 @@
             # Log in and verify the boot time has changed
             linux_client = RemoteClient(server, self.ssh_user, self.password)
             new_boot_time = linux_client.get_boot_time()
-            self.assertGreater(new_boot_time, boot_time)
+            self.assertTrue(new_boot_time > boot_time,
+                            '%s > %s' % (new_boot_time, boot_time))
 
     @skip_because(bug="1014647")
     @attr(type='smoke')
@@ -104,7 +105,8 @@
             # Log in and verify the boot time has changed
             linux_client = RemoteClient(server, self.ssh_user, self.password)
             new_boot_time = linux_client.get_boot_time()
-            self.assertGreater(new_boot_time, boot_time)
+            self.assertTrue(new_boot_time > boot_time,
+                            '%s > %s' % (new_boot_time, boot_time))
 
     @attr(type='smoke')
     def test_rebuild_server(self):
diff --git a/tempest/api/compute/v3/admin/test_aggregates.py b/tempest/api/compute/v3/admin/test_aggregates.py
index 7491742..956eddd 100644
--- a/tempest/api/compute/v3/admin/test_aggregates.py
+++ b/tempest/api/compute/v3/admin/test_aggregates.py
@@ -210,10 +210,3 @@
                                                wait_until='ACTIVE')
         resp, body = admin_servers_client.get_server(server['id'])
         self.assertEqual(self.host, body[self._host_key])
-
-
-class AggregatesAdminV3TestXML(AggregatesAdminV3TestJSON):
-    _host_key = (
-        '{http://docs.openstack.org/compute/ext/'
-        'extended_server_attributes/api/v3}host')
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_aggregates_negative.py b/tempest/api/compute/v3/admin/test_aggregates_negative.py
index 4eb75a5..da3568a 100644
--- a/tempest/api/compute/v3/admin/test_aggregates_negative.py
+++ b/tempest/api/compute/v3/admin/test_aggregates_negative.py
@@ -188,7 +188,3 @@
 
         self.assertRaises(exceptions.NotFound, self.client.remove_host,
                           aggregate['id'], non_exist_host)
-
-
-class AggregatesAdminNegativeV3TestXML(AggregatesAdminNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_availability_zone.py b/tempest/api/compute/v3/admin/test_availability_zone.py
index 2955dc8..5ced2b1 100644
--- a/tempest/api/compute/v3/admin/test_availability_zone.py
+++ b/tempest/api/compute/v3/admin/test_availability_zone.py
@@ -53,7 +53,3 @@
             self.non_adm_client.get_availability_zone_list()
         self.assertEqual(200, resp.status)
         self.assertTrue(len(availability_zone) > 0)
-
-
-class AZAdminV3TestXML(AZAdminV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_availability_zone_negative.py b/tempest/api/compute/v3/admin/test_availability_zone_negative.py
index d69e956..60cd1d6 100644
--- a/tempest/api/compute/v3/admin/test_availability_zone_negative.py
+++ b/tempest/api/compute/v3/admin/test_availability_zone_negative.py
@@ -39,7 +39,3 @@
         self.assertRaises(
             exceptions.Unauthorized,
             self.non_adm_client.get_availability_zone_list_detail)
-
-
-class AZAdminNegativeV3TestXML(AZAdminNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_flavors_access.py b/tempest/api/compute/v3/admin/test_flavors_access.py
index 532dc48..d668640 100644
--- a/tempest/api/compute/v3/admin/test_flavors_access.py
+++ b/tempest/api/compute/v3/admin/test_flavors_access.py
@@ -99,7 +99,3 @@
         resp, flavors = self.flavors_client.list_flavors_with_detail()
         self.assertEqual(resp.status, 200)
         self.assertNotIn(new_flavor['id'], map(lambda x: x['id'], flavors))
-
-
-class FlavorsAdminV3TestXML(FlavorsAccessV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_flavors_access_negative.py b/tempest/api/compute/v3/admin/test_flavors_access_negative.py
index e9d811c..8595b2c 100644
--- a/tempest/api/compute/v3/admin/test_flavors_access_negative.py
+++ b/tempest/api/compute/v3/admin/test_flavors_access_negative.py
@@ -140,7 +140,3 @@
                           self.client.remove_flavor_access,
                           new_flavor['id'],
                           str(uuid.uuid4()))
-
-
-class FlavorsAdminNegativeV3TestXML(FlavorsAccessNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_flavors_extra_specs.py b/tempest/api/compute/v3/admin/test_flavors_extra_specs.py
index b084157..0363fcb 100644
--- a/tempest/api/compute/v3/admin/test_flavors_extra_specs.py
+++ b/tempest/api/compute/v3/admin/test_flavors_extra_specs.py
@@ -120,7 +120,3 @@
         self.assertEqual(resp.status, 200)
         self.assertEqual(body['key1'], 'value1')
         self.assertNotIn('key2', body)
-
-
-class FlavorsExtraSpecsV3TestXML(FlavorsExtraSpecsV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_flavors_extra_specs_negative.py b/tempest/api/compute/v3/admin/test_flavors_extra_specs_negative.py
index a81edb1..0f300a1 100644
--- a/tempest/api/compute/v3/admin/test_flavors_extra_specs_negative.py
+++ b/tempest/api/compute/v3/admin/test_flavors_extra_specs_negative.py
@@ -124,7 +124,3 @@
                           "key1",
                           key1="value",
                           key2="value")
-
-
-class FlavorsExtraSpecsNegativeV3TestXML(FlavorsExtraSpecsNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_hosts.py b/tempest/api/compute/v3/admin/test_hosts.py
index a110d02..8199ee8 100644
--- a/tempest/api/compute/v3/admin/test_hosts.py
+++ b/tempest/api/compute/v3/admin/test_hosts.py
@@ -86,7 +86,3 @@
             self.assertIsNotNone(host_resource['memory_mb'])
             self.assertIsNotNone(host_resource['project'])
             self.assertEqual(hostname, host_resource['host'])
-
-
-class HostsAdminV3TestXML(HostsAdminV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_hosts_negative.py b/tempest/api/compute/v3/admin/test_hosts_negative.py
index 9841950..aa50618 100644
--- a/tempest/api/compute/v3/admin/test_hosts_negative.py
+++ b/tempest/api/compute/v3/admin/test_hosts_negative.py
@@ -168,7 +168,3 @@
         self.assertRaises(exceptions.Unauthorized,
                           self.non_admin_client.reboot_host,
                           hostname)
-
-
-class HostsAdminNegativeV3TestXML(HostsAdminNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_hypervisor.py b/tempest/api/compute/v3/admin/test_hypervisor.py
index 84f6b4d..8bd4abb 100644
--- a/tempest/api/compute/v3/admin/test_hypervisor.py
+++ b/tempest/api/compute/v3/admin/test_hypervisor.py
@@ -97,7 +97,3 @@
             hypers[0]['hypervisor_hostname'])
         self.assertEqual(200, resp.status)
         self.assertTrue(len(hypers) > 0)
-
-
-class HypervisorAdminV3TestXML(HypervisorAdminV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_hypervisor_negative.py b/tempest/api/compute/v3/admin/test_hypervisor_negative.py
index 68b0af0..63e8cae 100644
--- a/tempest/api/compute/v3/admin/test_hypervisor_negative.py
+++ b/tempest/api/compute/v3/admin/test_hypervisor_negative.py
@@ -136,7 +136,3 @@
             exceptions.Unauthorized,
             self.non_adm_client.search_hypervisor,
             hypers[0]['hypervisor_hostname'])
-
-
-class HypervisorAdminNegativeV3TestXML(HypervisorAdminNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_instance_usage_audit_log.py b/tempest/api/compute/v3/admin/test_instance_usage_audit_log.py
index fada98c..9651338 100644
--- a/tempest/api/compute/v3/admin/test_instance_usage_audit_log.py
+++ b/tempest/api/compute/v3/admin/test_instance_usage_audit_log.py
@@ -57,7 +57,3 @@
         for item in expected_items:
             self.assertIn(item, body)
         self.assertEqual(body['period_ending'], "2012-12-23 23:00:00")
-
-
-class InstanceUsageAuditLogV3TestXML(InstanceUsageAuditLogV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_instance_usage_audit_log_negative.py b/tempest/api/compute/v3/admin/test_instance_usage_audit_log_negative.py
index 06b3711..8ed1a98 100644
--- a/tempest/api/compute/v3/admin/test_instance_usage_audit_log_negative.py
+++ b/tempest/api/compute/v3/admin/test_instance_usage_audit_log_negative.py
@@ -39,8 +39,3 @@
         self.assertRaises(exceptions.BadRequest,
                           self.adm_client.list_instance_usage_audit_logs,
                           "invalid_time")
-
-
-class InstanceUsageLogNegativeV3TestXML(
-    InstanceUsageLogNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_quotas.py b/tempest/api/compute/v3/admin/test_quotas.py
index ed4561d..e116734 100644
--- a/tempest/api/compute/v3/admin/test_quotas.py
+++ b/tempest/api/compute/v3/admin/test_quotas.py
@@ -147,7 +147,3 @@
         self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
                         instances=default_instances_quota)
         self.assertRaises(exceptions.OverLimit, self.create_test_server)
-
-
-class QuotasAdminV3TestXML(QuotasAdminV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_servers.py b/tempest/api/compute/v3/admin/test_servers.py
index dec573e..2db128e 100644
--- a/tempest/api/compute/v3/admin/test_servers.py
+++ b/tempest/api/compute/v3/admin/test_servers.py
@@ -155,7 +155,3 @@
         resp, server = self.non_admin_client.get_server(rebuilt_server['id'])
         rebuilt_image_id = server['image']['id']
         self.assertEqual(self.image_ref_alt, rebuilt_image_id)
-
-
-class ServersAdminV3TestXML(ServersAdminV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_servers_negative.py b/tempest/api/compute/v3/admin/test_servers_negative.py
index fb4b043..a86bdfc 100644
--- a/tempest/api/compute/v3/admin/test_servers_negative.py
+++ b/tempest/api/compute/v3/admin/test_servers_negative.py
@@ -135,7 +135,3 @@
         self.assertRaises(exceptions.Conflict,
                           self.client.migrate_server,
                           server_id)
-
-
-class ServersAdminNegativeV3TestXML(ServersAdminNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_services.py b/tempest/api/compute/v3/admin/test_services.py
index ba32739..9e55e78 100644
--- a/tempest/api/compute/v3/admin/test_services.py
+++ b/tempest/api/compute/v3/admin/test_services.py
@@ -76,7 +76,3 @@
         self.assertEqual(1, len(services))
         self.assertEqual(host_name, services[0]['host'])
         self.assertEqual(binary_name, services[0]['binary'])
-
-
-class ServicesAdminV3TestXML(ServicesAdminV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_services_negative.py b/tempest/api/compute/v3/admin/test_services_negative.py
index 6f583fa..1382347 100644
--- a/tempest/api/compute/v3/admin/test_services_negative.py
+++ b/tempest/api/compute/v3/admin/test_services_negative.py
@@ -64,7 +64,3 @@
         resp, services = self.client.list_services(params)
         self.assertEqual(200, resp.status)
         self.assertEqual(0, len(services))
-
-
-class ServicesAdminNegativeV3TestXML(ServicesAdminNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_simple_tenant_usage.py b/tempest/api/compute/v3/admin/test_simple_tenant_usage.py
index 3a2d2e5..7ee835b 100644
--- a/tempest/api/compute/v3/admin/test_simple_tenant_usage.py
+++ b/tempest/api/compute/v3/admin/test_simple_tenant_usage.py
@@ -83,7 +83,3 @@
 
         self.assertEqual(200, resp.status)
         self.assertEqual(len(tenant_usage), 8)
-
-
-class TenantUsagesV3TestXML(TenantUsagesV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/admin/test_simple_tenant_usage_negative.py b/tempest/api/compute/v3/admin/test_simple_tenant_usage_negative.py
index 58acd07..00068dc 100644
--- a/tempest/api/compute/v3/admin/test_simple_tenant_usage_negative.py
+++ b/tempest/api/compute/v3/admin/test_simple_tenant_usage_negative.py
@@ -71,7 +71,3 @@
                   'detailed': int(bool(True))}
         self.assertRaises(exceptions.Unauthorized,
                           self.client.list_tenant_usages, params)
-
-
-class TenantUsagesNegativeV3TestXML(TenantUsagesNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/certificates/test_certificates.py b/tempest/api/compute/v3/certificates/test_certificates.py
index 4dfa3be..b24f4d8 100644
--- a/tempest/api/compute/v3/certificates/test_certificates.py
+++ b/tempest/api/compute/v3/certificates/test_certificates.py
@@ -32,7 +32,3 @@
         self.assertEqual(200, resp.status)
         self.assertIn('data', body)
         self.assertIn('private_key', body)
-
-
-class CertificatesV3TestXML(CertificatesV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/images/test_image_metadata.py b/tempest/api/compute/v3/images/test_image_metadata.py
index 89a2f75..d0d2daf 100644
--- a/tempest/api/compute/v3/images/test_image_metadata.py
+++ b/tempest/api/compute/v3/images/test_image_metadata.py
@@ -106,7 +106,3 @@
         resp, resp_metadata = self.client.list_image_metadata(self.image_id)
         expected = {'key2': 'value2'}
         self.assertEqual(expected, resp_metadata)
-
-
-class ImagesMetadataTestXML(ImagesMetadataTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/images/test_image_metadata_negative.py b/tempest/api/compute/v3/images/test_image_metadata_negative.py
index 4878936..6e7cc8f 100644
--- a/tempest/api/compute/v3/images/test_image_metadata_negative.py
+++ b/tempest/api/compute/v3/images/test_image_metadata_negative.py
@@ -73,7 +73,3 @@
         self.assertRaises(exceptions.NotFound,
                           self.client.delete_image_metadata_item,
                           data_utils.rand_uuid(), 'key1')
-
-
-class ImagesMetadataTestXML(ImagesMetadataTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/images/test_images.py b/tempest/api/compute/v3/images/test_images.py
index ea097ad..52772e0 100644
--- a/tempest/api/compute/v3/images/test_images.py
+++ b/tempest/api/compute/v3/images/test_images.py
@@ -118,7 +118,3 @@
         self.assertRaises(exceptions.NotFound,
                           self.servers_client.create_image,
                           test_uuid, snapshot_name)
-
-
-class ImagesV3TestXML(ImagesV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/images/test_images_oneserver.py b/tempest/api/compute/v3/images/test_images_oneserver.py
index 0cb748b..babf452 100644
--- a/tempest/api/compute/v3/images/test_images_oneserver.py
+++ b/tempest/api/compute/v3/images/test_images_oneserver.py
@@ -130,7 +130,3 @@
         image_id = data_utils.parse_image_id(resp['location'])
         self.addCleanup(self.client.delete_image, image_id)
         self.assertEqual('202', resp['status'])
-
-
-class ImagesOneServerTestXML(ImagesOneServerTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/images/test_images_oneserver_negative.py b/tempest/api/compute/v3/images/test_images_oneserver_negative.py
index 3f93fbe..dc628dc 100644
--- a/tempest/api/compute/v3/images/test_images_oneserver_negative.py
+++ b/tempest/api/compute/v3/images/test_images_oneserver_negative.py
@@ -154,7 +154,3 @@
         self.image_ids.remove(image_id)
 
         self.assertRaises(exceptions.NotFound, self.client.get_image, image_id)
-
-
-class ImagesOneServerNegativeTestXML(ImagesOneServerNegativeTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/images/test_list_image_filters.py b/tempest/api/compute/v3/images/test_list_image_filters.py
index c04729c..ad93b3d 100644
--- a/tempest/api/compute/v3/images/test_list_image_filters.py
+++ b/tempest/api/compute/v3/images/test_list_image_filters.py
@@ -223,7 +223,3 @@
     def test_get_nonexistent_image(self):
         # Negative test: GET on non-existent image should fail
         self.assertRaises(exceptions.NotFound, self.client.get_image, 999)
-
-
-class ListImageFiltersTestXML(ListImageFiltersTestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/keypairs/test_keypairs.py b/tempest/api/compute/v3/keypairs/test_keypairs.py
index 3b449f7..4aef8b1 100644
--- a/tempest/api/compute/v3/keypairs/test_keypairs.py
+++ b/tempest/api/compute/v3/keypairs/test_keypairs.py
@@ -116,7 +116,3 @@
         self.assertEqual(key_name, k_name,
                          "The created keypair name is not equal "
                          "to the requested name!")
-
-
-class KeyPairsV3TestXML(KeyPairsV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/keypairs/test_keypairs_negative.py b/tempest/api/compute/v3/keypairs/test_keypairs_negative.py
index be7ee65..87f62b7 100644
--- a/tempest/api/compute/v3/keypairs/test_keypairs_negative.py
+++ b/tempest/api/compute/v3/keypairs/test_keypairs_negative.py
@@ -93,7 +93,3 @@
         k_name = 'key_/.\@:'
         self.assertRaises(exceptions.BadRequest, self._create_keypair,
                           k_name)
-
-
-class KeyPairsNegativeV3TestXML(KeyPairsNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_attach_interfaces.py b/tempest/api/compute/v3/servers/test_attach_interfaces.py
index 8f69c54..aa85424 100644
--- a/tempest/api/compute/v3/servers/test_attach_interfaces.py
+++ b/tempest/api/compute/v3/servers/test_attach_interfaces.py
@@ -119,7 +119,3 @@
 
         _ifs = self._test_delete_interface(server, ifs)
         self.assertEqual(len(ifs) - 1, len(_ifs))
-
-
-class AttachInterfacesV3TestXML(AttachInterfacesV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_attach_volume.py b/tempest/api/compute/v3/servers/test_attach_volume.py
index ff95ca4..2529af9 100644
--- a/tempest/api/compute/v3/servers/test_attach_volume.py
+++ b/tempest/api/compute/v3/servers/test_attach_volume.py
@@ -112,7 +112,3 @@
                                     server['admin_password'])
         partitions = linux_client.get_partitions()
         self.assertNotIn(self.device, partitions)
-
-
-class AttachVolumeV3TestXML(AttachVolumeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_create_server.py b/tempest/api/compute/v3/servers/test_create_server.py
index 7c63865..cb02894 100644
--- a/tempest/api/compute/v3/servers/test_create_server.py
+++ b/tempest/api/compute/v3/servers/test_create_server.py
@@ -222,11 +222,3 @@
             msg = "DiskConfig extension not enabled."
             raise cls.skipException(msg)
         super(ServersV3TestManualDisk, cls).setUpClass()
-
-
-class ServersV3TestXML(ServersV3TestJSON):
-    _interface = 'xml'
-
-
-class ServersWithSpecificFlavorV3TestXML(ServersWithSpecificFlavorV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_instance_actions.py b/tempest/api/compute/v3/servers/test_instance_actions.py
index 0b4b9bf..dd5dd30 100644
--- a/tempest/api/compute/v3/servers/test_instance_actions.py
+++ b/tempest/api/compute/v3/servers/test_instance_actions.py
@@ -61,7 +61,3 @@
         # Get the action details of the provided server with invalid request
         self.assertRaises(exceptions.NotFound, self.client.get_instance_action,
                           self.server_id, '999')
-
-
-class InstanceActionsV3TestXML(InstanceActionsV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_list_server_filters.py b/tempest/api/compute/v3/servers/test_list_server_filters.py
index 99cf8e1..15d6fa2 100644
--- a/tempest/api/compute/v3/servers/test_list_server_filters.py
+++ b/tempest/api/compute/v3/servers/test_list_server_filters.py
@@ -250,7 +250,3 @@
         params = {'limit': 1}
         resp, servers = self.client.list_servers_with_detail(params)
         self.assertEqual(1, len(servers['servers']))
-
-
-class ListServerFiltersV3TestXML(ListServerFiltersV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_list_servers_negative.py b/tempest/api/compute/v3/servers/test_list_servers_negative.py
index 7217148..10d36bf 100644
--- a/tempest/api/compute/v3/servers/test_list_servers_negative.py
+++ b/tempest/api/compute/v3/servers/test_list_servers_negative.py
@@ -162,7 +162,3 @@
                   if srv['id'] in deleted_ids]
         self.assertEqual('200', resp['status'])
         self.assertEqual([], actual)
-
-
-class ListServersNegativeV3TestXML(ListServersNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_multiple_create.py b/tempest/api/compute/v3/servers/test_multiple_create.py
index c7377a6..429a8ba 100644
--- a/tempest/api/compute/v3/servers/test_multiple_create.py
+++ b/tempest/api/compute/v3/servers/test_multiple_create.py
@@ -87,7 +87,3 @@
                                                    return_reservation_id=True)
         self.assertEqual(resp['status'], '202')
         self.assertIn('reservation_id', body)
-
-
-class MultipleCreateV3TestXML(MultipleCreateV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_server_actions.py b/tempest/api/compute/v3/servers/test_server_actions.py
index eb7bc94..9bb287a 100644
--- a/tempest/api/compute/v3/servers/test_server_actions.py
+++ b/tempest/api/compute/v3/servers/test_server_actions.py
@@ -402,7 +402,3 @@
         resp, server = self.servers_client.start(self.server_id)
         self.assertEqual(202, resp.status)
         self.servers_client.wait_for_server_status(self.server_id, 'ACTIVE')
-
-
-class ServerActionsV3TestXML(ServerActionsV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_server_addresses.py b/tempest/api/compute/v3/servers/test_server_addresses.py
index 6ecd28b..bffa7c4 100644
--- a/tempest/api/compute/v3/servers/test_server_addresses.py
+++ b/tempest/api/compute/v3/servers/test_server_addresses.py
@@ -78,7 +78,3 @@
             addr = addr[addr_type]
             for address in addresses[addr_type]:
                 self.assertTrue(any([a for a in addr if a == address]))
-
-
-class ServerAddressesV3TestXML(ServerAddressesV3Test):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_server_metadata.py b/tempest/api/compute/v3/servers/test_server_metadata.py
index 0571f38..1758b0b 100644
--- a/tempest/api/compute/v3/servers/test_server_metadata.py
+++ b/tempest/api/compute/v3/servers/test_server_metadata.py
@@ -209,7 +209,3 @@
         self.assertRaises(exceptions.BadRequest,
                           self.client.set_server_metadata,
                           self.server_id, meta=meta, no_metadata_field=True)
-
-
-class ServerMetadataV3TestXML(ServerMetadataV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_server_rescue.py b/tempest/api/compute/v3/servers/test_server_rescue.py
index 870432b..99e8f68 100644
--- a/tempest/api/compute/v3/servers/test_server_rescue.py
+++ b/tempest/api/compute/v3/servers/test_server_rescue.py
@@ -167,7 +167,3 @@
                           self.servers_client.detach_volume,
                           self.server_id,
                           self.volume_to_detach['id'])
-
-
-class ServerRescueV3TestXML(ServerRescueV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_servers.py b/tempest/api/compute/v3/servers/test_servers.py
index 40ca0f0..72c91b0 100644
--- a/tempest/api/compute/v3/servers/test_servers.py
+++ b/tempest/api/compute/v3/servers/test_servers.py
@@ -126,7 +126,3 @@
         self.client.wait_for_server_status(server['id'], 'ACTIVE')
         resp, server = self.client.get_server(server['id'])
         self.assertEqual('2001:2001::3', server['os-access-ips:access_ip_v6'])
-
-
-class ServersV3TestXML(ServersV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/servers/test_servers_negative.py b/tempest/api/compute/v3/servers/test_servers_negative.py
index 29cbc92..e58d33d 100644
--- a/tempest/api/compute/v3/servers/test_servers_negative.py
+++ b/tempest/api/compute/v3/servers/test_servers_negative.py
@@ -428,7 +428,3 @@
         self.assertRaises(exceptions.Conflict,
                           self.client.unshelve_server,
                           self.server_id)
-
-
-class ServersNegativeV3TestXML(ServersNegativeV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/test_extensions.py b/tempest/api/compute/v3/test_extensions.py
index 8a88fca..32f62d5 100644
--- a/tempest/api/compute/v3/test_extensions.py
+++ b/tempest/api/compute/v3/test_extensions.py
@@ -49,7 +49,3 @@
         resp, extension = self.extensions_client.get_extension('servers')
         self.assertEqual(200, resp.status)
         self.assertEqual('servers', extension['alias'])
-
-
-class ExtensionsV3TestXML(ExtensionsV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/test_live_block_migration.py b/tempest/api/compute/v3/test_live_block_migration.py
index 50a5f3c..087bffb 100644
--- a/tempest/api/compute/v3/test_live_block_migration.py
+++ b/tempest/api/compute/v3/test_live_block_migration.py
@@ -162,10 +162,3 @@
             cls.servers_client.delete_server(server_id)
 
         super(LiveBlockMigrationV3TestJSON, cls).tearDownClass()
-
-
-class LiveBlockMigrationV3TestXML(LiveBlockMigrationV3TestJSON):
-    _host_key = (
-        '{http://docs.openstack.org/compute/ext/'
-        'extended_server_attributes/api/v3}host')
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/test_quotas.py b/tempest/api/compute/v3/test_quotas.py
index df25249..1cbfa2b 100644
--- a/tempest/api/compute/v3/test_quotas.py
+++ b/tempest/api/compute/v3/test_quotas.py
@@ -63,7 +63,3 @@
         resp, tenant_quota_set = self.client.get_quota_set(self.tenant_id)
         self.assertEqual(200, resp.status)
         self.assertEqual(defualt_quota_set, tenant_quota_set)
-
-
-class QuotasV3TestXML(QuotasV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/compute/v3/test_version.py b/tempest/api/compute/v3/test_version.py
index 166d161..6fbe794 100644
--- a/tempest/api/compute/v3/test_version.py
+++ b/tempest/api/compute/v3/test_version.py
@@ -28,7 +28,3 @@
         self.assertEqual(200, resp.status)
         self.assertIn("id", version)
         self.assertEqual("v3.0", version["id"])
-
-
-class VersionV3TestXML(VersionV3TestJSON):
-    _interface = 'xml'
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index bfc2287..2a5401f 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -199,8 +199,8 @@
 
     @attr(type='gate')
     def test_list_images_param_status(self):
-        # Test to get all available images
-        params = {"status": "available"}
+        # Test to get all active images
+        params = {"status": "active"}
         self._list_by_param_value_and_assert(params)
 
     @attr(type='gate')
diff --git a/tempest/api/object_storage/test_account_services.py b/tempest/api/object_storage/test_account_services.py
index 68b9222..2a1bf0d 100644
--- a/tempest/api/object_storage/test_account_services.py
+++ b/tempest/api/object_storage/test_account_services.py
@@ -16,6 +16,7 @@
 import random
 
 from tempest.api.object_storage import base
+from tempest.common import custom_matchers
 from tempest.common.utils import data_utils
 from tempest import exceptions
 from tempest.test import attr
@@ -52,6 +53,13 @@
             self.assertIn(container_name, container_names)
 
     @attr(type='smoke')
+    def test_list_extensions(self):
+        resp, extensions = self.account_client.list_extensions()
+
+        self.assertIn(int(resp['status']), HTTP_SUCCESS)
+        self.assertThat(resp, custom_matchers.AreAllWellFormatted())
+
+    @attr(type='smoke')
     def test_list_containers_with_limit(self):
         # list containers one of them, half of them then all of them
         for limit in (1, self.containers_count / 2, self.containers_count):
diff --git a/tempest/services/object_storage/account_client.py b/tempest/services/object_storage/account_client.py
index e796f9b..eec5a05 100644
--- a/tempest/services/object_storage/account_client.py
+++ b/tempest/services/object_storage/account_client.py
@@ -93,6 +93,14 @@
         body = json.loads(body)
         return resp, body
 
+    def list_extensions(self):
+        _base_url = self.base_url
+        self.base_url = "/".join(self.base_url.split("/")[:-2])
+        resp, body = self.get('info')
+        self.base_url = _base_url
+        body = json.loads(body)
+        return resp, body
+
 
 class AccountClientCustomizedHeader(RestClient):