diff --git a/tempest/tests/compute/admin/test_flavors.py b/tempest/tests/compute/admin/test_flavors.py
index eb873bd..8172bd4 100644
--- a/tempest/tests/compute/admin/test_flavors.py
+++ b/tempest/tests/compute/admin/test_flavors.py
@@ -19,12 +19,9 @@
 from nose.plugins.attrib import attr
 import unittest2 as unittest
 
-from tempest import config
 from tempest.tests import compute
 from tempest.tests.compute import base
 
-CONF = config.TempestConfig()
-
 
 class FlavorsAdminTestBase(object):
 
@@ -71,12 +68,12 @@
             self.assertEqual(flavor['rxtx_factor'], self.rxtx)
             self.assertEqual(flavor['OS-FLV-EXT-DATA:ephemeral'],
                              self.ephemeral)
-            if CONF.general.use_xml:
+            if self._interface == "xml":
                 XMLNS_OS_FLV_ACCESS = "http://docs.openstack.org/compute/ext/"\
                     "flavor_access/api/v2"
                 key = "{" + XMLNS_OS_FLV_ACCESS + "}is_public"
                 self.assertEqual(flavor[key], "True")
-            else:
+            if self._interface == "json":
                 self.assertEqual(flavor['os-flavor-access:is_public'], True)
 
             #Verify flavor is retrieved
@@ -167,12 +164,12 @@
             self.assertEqual(flavor['swap'], '')
             self.assertEqual(int(flavor['rxtx_factor']), 1)
             self.assertEqual(int(flavor['OS-FLV-EXT-DATA:ephemeral']), 0)
-            if CONF.general.use_xml:
+            if self._interface == "xml":
                 XMLNS_OS_FLV_ACCESS = "http://docs.openstack.org/compute/ext/"\
                     "flavor_access/api/v2"
                 key = "{" + XMLNS_OS_FLV_ACCESS + "}is_public"
                 self.assertEqual(flavor[key], "True")
-            else:
+            if self._interface == "json":
                 self.assertEqual(flavor['os-flavor-access:is_public'], True)
 
             #Verify flavor is retrieved
@@ -244,11 +241,23 @@
             self.client.wait_for_resource_deletion(self.new_flavor_id)
 
 
-class FlavorsAdminTest(base.BaseComputeAdminTest, base.BaseCompTest,
-                       FlavorsAdminTestBase):
+class FlavorsAdminTestXML(base.BaseComputeAdminTestXML,
+                          base.BaseComputeTestXML,
+                          FlavorsAdminTestBase):
 
     @classmethod
     def setUpClass(cls):
-        super(FlavorsAdminTest, cls).setUpClass()
-        base.BaseCompTest.setUpClass()
+        super(FlavorsAdminTestXML, cls).setUpClass()
+        base.BaseComputeTestXML.setUpClass()
+        FlavorsAdminTestBase.setUpClass(cls)
+
+
+class FlavorsAdminTestJSON(base.BaseComputeAdminTestJSON,
+                           base.BaseComputeTestJSON,
+                           FlavorsAdminTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(FlavorsAdminTestJSON, cls).setUpClass()
+        base.BaseComputeTestJSON.setUpClass()
         FlavorsAdminTestBase.setUpClass(cls)
diff --git a/tempest/tests/compute/admin/test_quotas.py b/tempest/tests/compute/admin/test_quotas.py
index ca58c6a..eaf245a 100644
--- a/tempest/tests/compute/admin/test_quotas.py
+++ b/tempest/tests/compute/admin/test_quotas.py
@@ -19,10 +19,10 @@
 
 from tempest import exceptions
 from tempest.services.compute.admin.json import quotas_client as adm_quotas
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class QuotasTest(BaseCompTest):
+class QuotasTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/base.py b/tempest/tests/compute/base.py
index d1cf522..c44a2f1 100644
--- a/tempest/tests/compute/base.py
+++ b/tempest/tests/compute/base.py
@@ -26,7 +26,8 @@
 from tempest import config
 from tempest import exceptions
 
-__all__ = ['BaseCompTest', 'BaseComputeAdminTest']
+__all__ = ['BaseComputeTest', 'BaseComputeTestJSON', 'BaseComputeTestXML',
+           'BaseComputeAdminTestJSON', 'BaseComputeAdminTestXML']
 
 LOG = logging.getLogger(__name__)
 
@@ -45,9 +46,10 @@
             username, tenant_name, password = creds
             os = clients.Manager(username=username,
                                  password=password,
-                                 tenant_name=tenant_name)
+                                 tenant_name=tenant_name,
+                                 interface=cls._interface)
         else:
-            os = clients.Manager()
+            os = clients.Manager(interface=cls._interface)
 
         cls.os = os
         cls.servers_client = os.servers_client
@@ -76,7 +78,7 @@
         """
         Returns an instance of the Identity Admin API client
         """
-        os = clients.IdentityManager()
+        os = clients.IdentityManager(interface=cls._interface)
         admin_client = os.admin_client
         return admin_client
 
@@ -225,6 +227,23 @@
             time.sleep(self.build_interval)
 
 
+class BaseComputeTestJSON(BaseCompTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(BaseComputeTestJSON, cls).setUpClass()
+
+# NOTE(danms): For transition, keep the old name active as JSON
+BaseComputeTest = BaseComputeTestJSON
+
+
+class BaseComputeTestXML(BaseCompTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "xml"
+        super(BaseComputeTestXML, cls).setUpClass()
+
+
 class BaseComputeAdminTest(unittest.TestCase):
 
     """Base test case class for all Compute Admin API tests."""
@@ -241,4 +260,18 @@
                    "in configuration.")
             raise nose.SkipTest(msg)
 
-        cls.os = clients.AdminManager()
+        cls.os = clients.AdminManager(interface=cls._interface)
+
+
+class BaseComputeAdminTestJSON(BaseComputeAdminTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(BaseComputeAdminTestJSON, cls).setUpClass()
+
+
+class BaseComputeAdminTestXML(BaseComputeAdminTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "xml"
+        super(BaseComputeAdminTestXML, cls).setUpClass()
diff --git a/tempest/tests/compute/flavors/test_flavors.py b/tempest/tests/compute/flavors/test_flavors.py
index bf56464..53cad65 100644
--- a/tempest/tests/compute/flavors/test_flavors.py
+++ b/tempest/tests/compute/flavors/test_flavors.py
@@ -137,9 +137,19 @@
                           9999)
 
 
-class FlavorsTest(base.BaseCompTest, FlavorsTestBase):
+class FlavorsTestXML(base.BaseComputeTestXML,
+                     FlavorsTestBase):
 
     @classmethod
     def setUpClass(cls):
-        super(FlavorsTest, cls).setUpClass()
+        super(FlavorsTestXML, cls).setUpClass()
+        cls.client = cls.flavors_client
+
+
+class FlavorsTestJSON(base.BaseComputeTestJSON,
+                      FlavorsTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(FlavorsTestJSON, cls).setUpClass()
         cls.client = cls.flavors_client
diff --git a/tempest/tests/compute/floating_ips/test_floating_ips_actions.py b/tempest/tests/compute/floating_ips/test_floating_ips_actions.py
index e81022c..9a9914a 100644
--- a/tempest/tests/compute/floating_ips/test_floating_ips_actions.py
+++ b/tempest/tests/compute/floating_ips/test_floating_ips_actions.py
@@ -205,13 +205,25 @@
                       ' with out passing floating IP  should raise BadRequest')
 
 
-class FloatingIPsTest(base.BaseCompTest, FloatingIPsTestBase):
+class FloatingIPsTestJSON(base.BaseComputeTestJSON, FloatingIPsTestBase):
     @classmethod
     def setUpClass(cls):
-        super(FloatingIPsTest, cls).setUpClass()
+        super(FloatingIPsTestJSON, cls).setUpClass()
         FloatingIPsTestBase.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
         FloatingIPsTestBase.tearDownClass(cls)
-        super(FloatingIPsTest, cls).tearDownClass()
+        super(FloatingIPsTestJSON, cls).tearDownClass()
+
+
+class FloatingIPsTestXML(base.BaseComputeTestXML, FloatingIPsTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(FloatingIPsTestXML, cls).setUpClass()
+        FloatingIPsTestBase.setUpClass(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        FloatingIPsTestBase.tearDownClass(cls)
+        super(FloatingIPsTestXML, cls).tearDownClass()
diff --git a/tempest/tests/compute/floating_ips/test_list_floating_ips.py b/tempest/tests/compute/floating_ips/test_list_floating_ips.py
index 4fbe4eb..9eec27c 100644
--- a/tempest/tests/compute/floating_ips/test_list_floating_ips.py
+++ b/tempest/tests/compute/floating_ips/test_list_floating_ips.py
@@ -99,13 +99,27 @@
                       'nonexistant floating IP')
 
 
-class FloatingIPDetailsTest(base.BaseCompTest, FloatingIPDetailsTestBase):
+class FloatingIPDetailsTestJSON(base.BaseComputeTestJSON,
+                                FloatingIPDetailsTestBase):
     @classmethod
     def setUpClass(cls):
-        super(FloatingIPDetailsTest, cls).setUpClass()
+        super(FloatingIPDetailsTestJSON, cls).setUpClass()
         FloatingIPDetailsTestBase.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
         FloatingIPDetailsTestBase.tearDownClass(cls)
-        super(FloatingIPDetailsTest, cls).tearDownClass()
+        super(FloatingIPDetailsTestJSON, cls).tearDownClass()
+
+
+class FloatingIPDetailsTestXML(base.BaseComputeTestXML,
+                               FloatingIPDetailsTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(FloatingIPDetailsTestXML, cls).setUpClass()
+        FloatingIPDetailsTestBase.setUpClass(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        FloatingIPDetailsTestBase.tearDownClass(cls)
+        super(FloatingIPDetailsTestXML, cls).tearDownClass()
diff --git a/tempest/tests/compute/images/test_image_metadata.py b/tempest/tests/compute/images/test_image_metadata.py
index 66c051e..cdf4249 100644
--- a/tempest/tests/compute/images/test_image_metadata.py
+++ b/tempest/tests/compute/images/test_image_metadata.py
@@ -19,10 +19,10 @@
 
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ImagesMetadataTest(BaseCompTest):
+class ImagesMetadataTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/images/test_images.py b/tempest/tests/compute/images/test_images.py
index 8bea257..2557f16 100644
--- a/tempest/tests/compute/images/test_images.py
+++ b/tempest/tests/compute/images/test_images.py
@@ -213,13 +213,40 @@
                       "exceeds 35 character ID length limit")
 
 
-class ImagesTest(base.BaseCompTest, ImagesTestBase):
+class ImagesTestJSON(base.BaseComputeTestJSON,
+                     ImagesTestBase):
     def tearDown(self):
         ImagesTestBase.tearDown(self)
 
     @classmethod
     def setUpClass(cls):
-        super(ImagesTest, cls).setUpClass()
+        super(ImagesTestJSON, cls).setUpClass()
+        cls.client = cls.images_client
+        cls.servers_client = cls.servers_client
+
+        cls.image_ids = []
+
+        if compute.MULTI_USER:
+            if cls.config.compute.allow_tenant_isolation:
+                creds = cls._get_isolated_creds()
+                username, tenant_name, password = creds
+                cls.alt_manager = clients.Manager(username=username,
+                                                  password=password,
+                                                  tenant_name=tenant_name)
+            else:
+                # Use the alt_XXX credentials in the config file
+                cls.alt_manager = clients.AltManager()
+            cls.alt_client = cls.alt_manager.images_client
+
+
+class ImagesTestXML(base.BaseComputeTestXML,
+                    ImagesTestBase):
+    def tearDown(self):
+        ImagesTestBase.tearDown(self)
+
+    @classmethod
+    def setUpClass(cls):
+        super(ImagesTestXML, cls).setUpClass()
         cls.client = cls.images_client
         cls.servers_client = cls.servers_client
 
diff --git a/tempest/tests/compute/images/test_images_oneserver.py b/tempest/tests/compute/images/test_images_oneserver.py
index 27c73f4..f8b560b 100644
--- a/tempest/tests/compute/images/test_images_oneserver.py
+++ b/tempest/tests/compute/images/test_images_oneserver.py
@@ -187,14 +187,43 @@
         self.assertRaises(exceptions.NotFound, self.client.get_image, image_id)
 
 
-class ImagesOneServerTest(base.BaseCompTest, ImagesOneServerTestBase):
+class ImagesOneServerTestJSON(base.BaseComputeTestJSON,
+                              ImagesOneServerTestBase):
 
     def tearDown(self):
         ImagesOneServerTestBase.tearDown(self)
 
     @classmethod
     def setUpClass(cls):
-        super(ImagesOneServerTest, cls).setUpClass()
+        super(ImagesOneServerTestJSON, cls).setUpClass()
+        cls.client = cls.images_client
+        cls.servers_client = cls.servers_client
+        cls.server = cls.create_server()
+
+        cls.image_ids = []
+
+        if compute.MULTI_USER:
+            if cls.config.compute.allow_tenant_isolation:
+                creds = cls._get_isolated_creds()
+                username, tenant_name, password = creds
+                cls.alt_manager = clients.Manager(username=username,
+                                                  password=password,
+                                                  tenant_name=tenant_name)
+            else:
+                # Use the alt_XXX credentials in the config file
+                cls.alt_manager = clients.AltManager()
+            cls.alt_client = cls.alt_manager.images_client
+
+
+class ImagesOneServerTestXML(base.BaseComputeTestXML,
+                             ImagesOneServerTestBase):
+
+    def tearDown(self):
+        ImagesOneServerTestBase.tearDown(self)
+
+    @classmethod
+    def setUpClass(cls):
+        super(ImagesOneServerTestXML, cls).setUpClass()
         cls.client = cls.images_client
         cls.servers_client = cls.servers_client
         cls.server = cls.create_server()
diff --git a/tempest/tests/compute/images/test_images_whitebox.py b/tempest/tests/compute/images/test_images_whitebox.py
index a615761..2987534 100644
--- a/tempest/tests/compute/images/test_images_whitebox.py
+++ b/tempest/tests/compute/images/test_images_whitebox.py
@@ -24,7 +24,7 @@
 
 
 @attr(type='whitebox')
-class ImagesWhiteboxTest(whitebox.ComputeWhiteboxTest, base.BaseCompTest):
+class ImagesWhiteboxTest(whitebox.ComputeWhiteboxTest, base.BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/images/test_list_image_filters.py b/tempest/tests/compute/images/test_list_image_filters.py
index 1b1baff..26119e3 100644
--- a/tempest/tests/compute/images/test_list_image_filters.py
+++ b/tempest/tests/compute/images/test_list_image_filters.py
@@ -20,10 +20,10 @@
 from tempest.common.utils.data_utils import parse_image_id
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ListImageFiltersTest(BaseCompTest):
+class ListImageFiltersTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/images/test_list_images.py b/tempest/tests/compute/images/test_list_images.py
index 6b5ca10..da92ca8 100644
--- a/tempest/tests/compute/images/test_list_images.py
+++ b/tempest/tests/compute/images/test_list_images.py
@@ -20,10 +20,10 @@
 from tempest.common.utils.data_utils import parse_image_id
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ListImagesTest(BaseCompTest):
+class ListImagesTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/keypairs/test_keypairs.py b/tempest/tests/compute/keypairs/test_keypairs.py
index e3a97cf..7d95a9b 100644
--- a/tempest/tests/compute/keypairs/test_keypairs.py
+++ b/tempest/tests/compute/keypairs/test_keypairs.py
@@ -20,7 +20,8 @@
 
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTestJSON
+from tempest.tests.compute.base import BaseComputeTestXML
 
 
 class KeyPairsTestBase(object):
@@ -221,8 +222,15 @@
             self.fail('invalid name')
 
 
-class KeyPairsTest(BaseCompTest, KeyPairsTestBase):
+class KeyPairsTestXML(BaseComputeTestXML, KeyPairsTestBase):
     @classmethod
     def setUpClass(cls):
-        super(KeyPairsTest, cls).setUpClass()
+        super(KeyPairsTestXML, cls).setUpClass()
+        cls.client = cls.keypairs_client
+
+
+class KeyPairsTestJSON(BaseComputeTestJSON, KeyPairsTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(KeyPairsTestJSON, cls).setUpClass()
         cls.client = cls.keypairs_client
diff --git a/tempest/tests/compute/limits/test_absolute_limits.py b/tempest/tests/compute/limits/test_absolute_limits.py
index 2e201fe..89c5b25 100644
--- a/tempest/tests/compute/limits/test_absolute_limits.py
+++ b/tempest/tests/compute/limits/test_absolute_limits.py
@@ -20,7 +20,7 @@
 from tempest.tests.compute import base
 
 
-class AbsoluteLimitsTestBase(object):
+class AbsoluteLimitsTest(object):
 
     @staticmethod
     def setUpClass(cls):
@@ -50,8 +50,17 @@
                          % ', '.join(ele for ele in missing_elements))
 
 
-class AbsoluteLimitsTest(base.BaseCompTest, AbsoluteLimitsTestBase):
+class AbsoluteLimitsTestJSON(base.BaseComputeTestJSON,
+                             AbsoluteLimitsTest):
     @classmethod
     def setUpClass(cls):
-        super(AbsoluteLimitsTest, cls).setUpClass()
-        AbsoluteLimitsTestBase.setUpClass(cls)
+        super(AbsoluteLimitsTestJSON, cls).setUpClass()
+        AbsoluteLimitsTest.setUpClass(cls)
+
+
+class AbsoluteLimitsTestXML(base.BaseComputeTestXML,
+                            AbsoluteLimitsTest):
+    @classmethod
+    def setUpClass(cls):
+        super(AbsoluteLimitsTestXML, cls).setUpClass()
+        AbsoluteLimitsTest.setUpClass(cls)
diff --git a/tempest/tests/compute/security_groups/test_security_group_rules.py b/tempest/tests/compute/security_groups/test_security_group_rules.py
index 19e10a4..805adf4 100644
--- a/tempest/tests/compute/security_groups/test_security_group_rules.py
+++ b/tempest/tests/compute/security_groups/test_security_group_rules.py
@@ -22,7 +22,7 @@
 from tempest.tests.compute import base
 
 
-class SecurityGroupRulesTestBase(object):
+class SecurityGroupRulesTest(object):
 
     @staticmethod
     def setUpClass(cls):
@@ -244,8 +244,17 @@
                       'with nonexistant rule id')
 
 
-class SecurityGroupRulesTest(base.BaseCompTest, SecurityGroupRulesTestBase):
+class SecurityGroupRulesTestJSON(base.BaseComputeTestJSON,
+                                 SecurityGroupRulesTest):
     @classmethod
     def setUpClass(cls):
-        super(SecurityGroupRulesTest, cls).setUpClass()
-        SecurityGroupRulesTestBase.setUpClass(cls)
+        super(SecurityGroupRulesTestJSON, cls).setUpClass()
+        SecurityGroupRulesTest.setUpClass(cls)
+
+
+class SecurityGroupRulesTestXML(base.BaseComputeTestXML,
+                                SecurityGroupRulesTest):
+    @classmethod
+    def setUpClass(cls):
+        super(SecurityGroupRulesTestXML, cls).setUpClass()
+        SecurityGroupRulesTest.setUpClass(cls)
diff --git a/tempest/tests/compute/security_groups/test_security_groups.py b/tempest/tests/compute/security_groups/test_security_groups.py
index 51bea0d..5c0bd82 100644
--- a/tempest/tests/compute/security_groups/test_security_groups.py
+++ b/tempest/tests/compute/security_groups/test_security_groups.py
@@ -22,7 +22,7 @@
 from tempest.tests.compute import base
 
 
-class SecurityGroupsTestBase(object):
+class SecurityGroupsTest(object):
 
     @staticmethod
     def setUpClass(cls):
@@ -298,8 +298,17 @@
         self.assertEqual(202, resp.status)
 
 
-class SecurityGroupsTest(base.BaseCompTest, SecurityGroupsTestBase):
+class SecurityGroupsTestJSON(base.BaseComputeTestJSON,
+                             SecurityGroupsTest):
     @classmethod
     def setUpClass(cls):
-        super(SecurityGroupsTest, cls).setUpClass()
-        SecurityGroupsTestBase.setUpClass(cls)
+        super(SecurityGroupsTestJSON, cls).setUpClass()
+        SecurityGroupsTest.setUpClass(cls)
+
+
+class SecurityGroupsTestXML(base.BaseComputeTestXML,
+                            SecurityGroupsTest):
+    @classmethod
+    def setUpClass(cls):
+        super(SecurityGroupsTestXML, cls).setUpClass()
+        SecurityGroupsTest.setUpClass(cls)
diff --git a/tempest/tests/compute/servers/test_console_output.py b/tempest/tests/compute/servers/test_console_output.py
index 34ff614..3ad29a1 100644
--- a/tempest/tests/compute/servers/test_console_output.py
+++ b/tempest/tests/compute/servers/test_console_output.py
@@ -23,7 +23,7 @@
 from tempest.tests.compute import base
 
 
-class ConsoleOutputTestBase(object):
+class ConsoleOutputTest(object):
 
     @classmethod
     def setUpClass(self, cls):
@@ -87,13 +87,28 @@
 
 
 @attr(type='smoke')
-class ConsoleOutputTest(base.BaseCompTest, ConsoleOutputTestBase):
+class ConsoleOutputTestJSON(base.BaseComputeTestJSON,
+                            ConsoleOutputTest):
     @classmethod
     def setUpClass(cls):
-        super(ConsoleOutputTest, cls).setUpClass()
-        ConsoleOutputTestBase.setUpClass(cls)
+        super(ConsoleOutputTestJSON, cls).setUpClass()
+        ConsoleOutputTest.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
-        ConsoleOutputTestBase.tearDownClass(cls)
-        super(ConsoleOutputTest, cls).tearDownClass()
+        ConsoleOutputTest.tearDownClass(cls)
+        super(ConsoleOutputTestJSON, cls).tearDownClass()
+
+
+@attr(type='smoke')
+class ConsoleOutputTestXML(base.BaseComputeTestXML,
+                           ConsoleOutputTest):
+    @classmethod
+    def setUpClass(cls):
+        super(ConsoleOutputTestXML, cls).setUpClass()
+        ConsoleOutputTest.setUpClass(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        ConsoleOutputTest.tearDownClass(cls)
+        super(ConsoleOutputTestXML, cls).tearDownClass()
diff --git a/tempest/tests/compute/servers/test_create_server.py b/tempest/tests/compute/servers/test_create_server.py
index c655d18..c5a54dc 100644
--- a/tempest/tests/compute/servers/test_create_server.py
+++ b/tempest/tests/compute/servers/test_create_server.py
@@ -29,7 +29,7 @@
 from tempest.tests.compute import base
 
 
-class ServersTestBase(object):
+class ServersTest(object):
 
     run_ssh = tempest.config.TempestConfig().compute.run_ssh
 
@@ -122,7 +122,8 @@
 
 
 @attr(type='positive')
-class ServersTestAutoDisk(base.BaseCompTest, ServersTestBase):
+class ServersTestAutoDisk(base.BaseComputeTestJSON,
+                          ServersTest):
     @classmethod
     def setUpClass(cls):
         if not compute.DISK_CONFIG_ENABLED:
@@ -130,16 +131,17 @@
             raise nose.SkipTest(msg)
         super(ServersTestAutoDisk, cls).setUpClass()
         cls.disk_config = 'AUTO'
-        ServersTestBase.setUpClass(cls)
+        ServersTest.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
-        ServersTestBase.tearDownClass(cls)
+        ServersTest.tearDownClass(cls)
         super(ServersTestAutoDisk, cls).tearDownClass()
 
 
 @attr(type='positive')
-class ServersTestManualDisk(base.BaseCompTest, ServersTestBase):
+class ServersTestManualDisk(base.BaseComputeTestJSON,
+                            ServersTest):
     @classmethod
     def setUpClass(cls):
         if not compute.DISK_CONFIG_ENABLED:
@@ -147,23 +149,39 @@
             raise nose.SkipTest(msg)
         super(ServersTestManualDisk, cls).setUpClass()
         cls.disk_config = 'MANUAL'
-        ServersTestBase.setUpClass(cls)
+        ServersTest.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
-        ServersTestBase.tearDownClass(cls)
+        ServersTest.tearDownClass(cls)
         super(ServersTestManualDisk, cls).tearDownClass()
 
 
 @attr(type='smoke')
-class ServersTest(base.BaseCompTest, ServersTestBase):
+class ServersTestJSON(base.BaseComputeTestJSON,
+                      ServersTest):
     @classmethod
     def setUpClass(cls):
-        super(ServersTest, cls).setUpClass()
+        super(ServersTestJSON, cls).setUpClass()
         cls.disk_config = None
-        ServersTestBase.setUpClass(cls)
+        ServersTest.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
-        ServersTestBase.tearDownClass(cls)
-        super(ServersTest, cls).tearDownClass()
+        ServersTest.tearDownClass(cls)
+        super(ServersTestJSON, cls).tearDownClass()
+
+
+@attr(type='smoke')
+class ServersTestXML(base.BaseComputeTestXML,
+                     ServersTest):
+    @classmethod
+    def setUpClass(cls):
+        super(ServersTestXML, cls).setUpClass()
+        cls.disk_config = None
+        ServersTest.setUpClass(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        ServersTest.tearDownClass(cls)
+        super(ServersTestXML, cls).tearDownClass()
diff --git a/tempest/tests/compute/servers/test_disk_config.py b/tempest/tests/compute/servers/test_disk_config.py
index ff04bbc..490156b 100644
--- a/tempest/tests/compute/servers/test_disk_config.py
+++ b/tempest/tests/compute/servers/test_disk_config.py
@@ -22,10 +22,10 @@
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
 from tempest.tests import compute
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class TestServerDiskConfig(BaseCompTest):
+class TestServerDiskConfig(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/servers/test_list_server_filters.py b/tempest/tests/compute/servers/test_list_server_filters.py
index 1f3e48b..d943e5d 100644
--- a/tempest/tests/compute/servers/test_list_server_filters.py
+++ b/tempest/tests/compute/servers/test_list_server_filters.py
@@ -27,7 +27,7 @@
 from tempest.tests import utils
 
 
-class ListServerFiltersTestBase(object):
+class ListServerFiltersTest(object):
 
     @staticmethod
     def setUpClass(cls):
@@ -204,13 +204,27 @@
         return min_detail
 
 
-class ListServerFiltersTest(base.BaseCompTest, ListServerFiltersTestBase):
+class ListServerFiltersTestJSON(base.BaseComputeTestJSON,
+                                ListServerFiltersTest):
     @classmethod
     def setUpClass(cls):
-        super(ListServerFiltersTest, cls).setUpClass()
-        ListServerFiltersTestBase.setUpClass(cls)
+        super(ListServerFiltersTestJSON, cls).setUpClass()
+        ListServerFiltersTest.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
-        super(ListServerFiltersTest, cls).tearDownClass()
-        ListServerFiltersTestBase.tearDownClass(cls)
+        super(ListServerFiltersTestJSON, cls).tearDownClass()
+        ListServerFiltersTest.tearDownClass(cls)
+
+
+class ListServerFiltersTestXML(base.BaseComputeTestXML,
+                               ListServerFiltersTest):
+    @classmethod
+    def setUpClass(cls):
+        super(ListServerFiltersTestXML, cls).setUpClass()
+        ListServerFiltersTest.setUpClass(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        super(ListServerFiltersTestXML, cls).tearDownClass()
+        ListServerFiltersTest.tearDownClass(cls)
diff --git a/tempest/tests/compute/servers/test_list_servers_negative.py b/tempest/tests/compute/servers/test_list_servers_negative.py
index 66441c4..035ffe8 100644
--- a/tempest/tests/compute/servers/test_list_servers_negative.py
+++ b/tempest/tests/compute/servers/test_list_servers_negative.py
@@ -25,10 +25,10 @@
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
 from tempest.tests import compute
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ListServersNegativeTest(BaseCompTest):
+class ListServersNegativeTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/servers/test_server_actions.py b/tempest/tests/compute/servers/test_server_actions.py
index a2c5d5c..2fe8464 100644
--- a/tempest/tests/compute/servers/test_server_actions.py
+++ b/tempest/tests/compute/servers/test_server_actions.py
@@ -193,9 +193,10 @@
                       ' be allowed')
 
 
-class ServerActionsTest(base.BaseCompTest, ServerActionsTestBase):
+class ServerActionsTestXML(base.BaseComputeTestXML,
+                           ServerActionsTestBase):
     def setUp(self):
-        super(ServerActionsTest, self).setUp()
+        super(ServerActionsTestXML, self).setUp()
         # Check if the server is in a clean state after test
         try:
             self.client.wait_for_server_status(self.server_id, 'ACTIVE')
@@ -211,7 +212,7 @@
 
     @classmethod
     def setUpClass(cls):
-        super(ServerActionsTest, cls).setUpClass()
+        super(ServerActionsTestXML, cls).setUpClass()
         cls.client = cls.servers_client
         cls.name = rand_name('server')
         resp, server = cls.create_server_with_extras(cls.name,
@@ -224,4 +225,39 @@
     @classmethod
     def tearDownClass(cls):
         cls.clear_servers()
-        super(ServerActionsTest, cls).tearDownClass()
+        super(ServerActionsTestXML, cls).tearDownClass()
+
+
+class ServerActionsTestJSON(base.BaseComputeTestJSON,
+                            ServerActionsTestBase):
+    def setUp(self):
+        super(ServerActionsTestJSON, self).setUp()
+        # Check if the server is in a clean state after test
+        try:
+            self.client.wait_for_server_status(self.server_id, 'ACTIVE')
+        except exceptions:
+            # Rebuild server if something happened to it during a test
+            self.clear_servers()
+            resp, server = self.create_server_with_extras(self.name,
+                                                          self.image_ref,
+                                                          self.flavor_ref)
+            self.server_id = server['id']
+            self.password = server['adminPass']
+            self.client.wait_for_server_status(self.server_id, 'ACTIVE')
+
+    @classmethod
+    def setUpClass(cls):
+        super(ServerActionsTestJSON, cls).setUpClass()
+        cls.client = cls.servers_client
+        cls.name = rand_name('server')
+        resp, server = cls.create_server_with_extras(cls.name,
+                                                     cls.image_ref,
+                                                     cls.flavor_ref)
+        cls.server_id = server['id']
+        cls.password = server['adminPass']
+        cls.client.wait_for_server_status(cls.server_id, 'ACTIVE')
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.clear_servers()
+        super(ServerActionsTestJSON, cls).tearDownClass()
diff --git a/tempest/tests/compute/servers/test_server_addresses.py b/tempest/tests/compute/servers/test_server_addresses.py
index ee0dbb0..6e819a2 100644
--- a/tempest/tests/compute/servers/test_server_addresses.py
+++ b/tempest/tests/compute/servers/test_server_addresses.py
@@ -19,10 +19,10 @@
 
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ServerAddressesTest(BaseCompTest):
+class ServerAddressesTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/servers/test_server_metadata.py b/tempest/tests/compute/servers/test_server_metadata.py
index b1e82be..6c44c3c 100644
--- a/tempest/tests/compute/servers/test_server_metadata.py
+++ b/tempest/tests/compute/servers/test_server_metadata.py
@@ -19,10 +19,10 @@
 
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ServerMetadataTest(BaseCompTest):
+class ServerMetadataTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/servers/test_server_personality.py b/tempest/tests/compute/servers/test_server_personality.py
index 23222b5..6ea0959 100644
--- a/tempest/tests/compute/servers/test_server_personality.py
+++ b/tempest/tests/compute/servers/test_server_personality.py
@@ -78,9 +78,21 @@
             self.client.delete_server(server['id'])
 
 
-class ServerPersonalityTest(base.BaseCompTest, ServerPersonalityTestBase):
+class ServerPersonalityTestXML(base.BaseComputeTestXML,
+                               ServerPersonalityTestBase):
     @classmethod
     def setUpClass(cls):
-        super(ServerPersonalityTest, cls).setUpClass()
+        cls._interface = "xml"
+        super(ServerPersonalityTestXML, cls).setUpClass()
+        cls.client = cls.servers_client
+        cls.user_client = cls.limits_client
+
+
+class ServerPersonalityTestJSON(base.BaseComputeTestJSON,
+                                ServerPersonalityTestBase):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(ServerPersonalityTestJSON, cls).setUpClass()
         cls.client = cls.servers_client
         cls.user_client = cls.limits_client
diff --git a/tempest/tests/compute/servers/test_servers.py b/tempest/tests/compute/servers/test_servers.py
index 5829835..3566ef4 100644
--- a/tempest/tests/compute/servers/test_servers.py
+++ b/tempest/tests/compute/servers/test_servers.py
@@ -156,10 +156,10 @@
         self.assertEqual('204', resp['status'])
 
 
-class ServersTest(base.BaseCompTest, ServersTestBase):
+class ServersTestJSON(base.BaseComputeTestJSON, ServersTestBase):
     @classmethod
     def setUpClass(cls):
-        super(ServersTest, cls).setUpClass()
+        super(ServersTestJSON, cls).setUpClass()
         cls.client = cls.servers_client
 
     def tearDown(self):
@@ -169,4 +169,20 @@
         # memory
         self.clear_servers()
 
-        super(ServersTest, self).tearDown()
+        super(ServersTestJSON, self).tearDown()
+
+
+class ServersTestXML(base.BaseComputeTestXML, ServersTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(ServersTestXML, cls).setUpClass()
+        cls.client = cls.servers_client
+
+    def tearDown(self):
+        # clean up any remaining servers and wait for them to fully
+        # delete. This is done because delete calls are async, and if
+        # deletes are running slow we could very well overrun system
+        # memory
+        self.clear_servers()
+
+        super(ServersTestXML, self).tearDown()
diff --git a/tempest/tests/compute/servers/test_servers_negative.py b/tempest/tests/compute/servers/test_servers_negative.py
index 4ff7f12..dfe5944 100644
--- a/tempest/tests/compute/servers/test_servers_negative.py
+++ b/tempest/tests/compute/servers/test_servers_negative.py
@@ -24,10 +24,10 @@
 from tempest import clients
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class ServersNegativeTest(BaseCompTest):
+class ServersNegativeTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/test_authorization.py b/tempest/tests/compute/test_authorization.py
index ff38eee..78661d1 100644
--- a/tempest/tests/compute/test_authorization.py
+++ b/tempest/tests/compute/test_authorization.py
@@ -25,10 +25,10 @@
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
 from tempest.tests import compute
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class AuthorizationTest(BaseCompTest):
+class AuthorizationTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/test_extensions.py b/tempest/tests/compute/test_extensions.py
index dc14138..829e295 100644
--- a/tempest/tests/compute/test_extensions.py
+++ b/tempest/tests/compute/test_extensions.py
@@ -30,9 +30,17 @@
         self.assertEqual(200, resp.status)
 
 
-class ExtensionsTest(base.BaseCompTest):
+class ExtensionsTestJSON(base.BaseComputeTest, ExtensionsTestBase):
 
     @classmethod
     def setUpClass(cls):
-        super(ExtensionsTest, cls).setUpClass()
+        super(ExtensionsTestJSON, cls).setUpClass()
+        cls.client = cls.extensions_client
+
+
+class ExtensionsTestXML(base.BaseComputeTestXML, ExtensionsTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(ExtensionsTestXML, cls).setUpClass()
         cls.client = cls.extensions_client
diff --git a/tempest/tests/compute/test_live_block_migration.py b/tempest/tests/compute/test_live_block_migration.py
index 53f3ac0..915868c 100644
--- a/tempest/tests/compute/test_live_block_migration.py
+++ b/tempest/tests/compute/test_live_block_migration.py
@@ -31,7 +31,7 @@
 
 
 @attr(category='live-migration')
-class LiveBlockMigrationTest(base.BaseCompTest):
+class LiveBlockMigrationTest(base.BaseComputeTest):
 
     live_migration_available = (
         config.TempestConfig().compute.live_migration_available)
diff --git a/tempest/tests/compute/test_quotas.py b/tempest/tests/compute/test_quotas.py
index 5d06273..3dc2515 100644
--- a/tempest/tests/compute/test_quotas.py
+++ b/tempest/tests/compute/test_quotas.py
@@ -17,10 +17,10 @@
 
 from nose.plugins.attrib import attr
 
-from tempest.tests.compute.base import BaseCompTest
+from tempest.tests.compute.base import BaseComputeTest
 
 
-class QuotasTest(BaseCompTest):
+class QuotasTest(BaseComputeTest):
 
     @classmethod
     def setUpClass(cls):
diff --git a/tempest/tests/compute/volumes/test_attach_volume.py b/tempest/tests/compute/volumes/test_attach_volume.py
index 792bedf..9581026 100644
--- a/tempest/tests/compute/volumes/test_attach_volume.py
+++ b/tempest/tests/compute/volumes/test_attach_volume.py
@@ -107,8 +107,17 @@
             self._delete(server['id'], volume['id'])
 
 
-class TestAttachVolume(base.BaseCompTest, AttachVolumeTest):
+class TestAttachVolumeJSON(base.BaseComputeTestJSON,
+                           AttachVolumeTest):
     @classmethod
     def setUpClass(cls):
-        super(TestAttachVolume, cls).setUpClass()
+        super(TestAttachVolumeJSON, cls).setUpClass()
+        AttachVolumeTest.setUpClass(cls)
+
+
+class TestAttachVolumeXML(base.BaseComputeTestXML,
+                          AttachVolumeTest):
+    @classmethod
+    def setUpClass(cls):
+        super(TestAttachVolumeXML, cls).setUpClass()
         AttachVolumeTest.setUpClass(cls)
diff --git a/tempest/tests/compute/volumes/test_volumes_get.py b/tempest/tests/compute/volumes/test_volumes_get.py
index 45f8053..afb00cd 100644
--- a/tempest/tests/compute/volumes/test_volumes_get.py
+++ b/tempest/tests/compute/volumes/test_volumes_get.py
@@ -28,7 +28,7 @@
         # CREATE, GET, DELETE Volume
         volume = None
         try:
-            v_name = rand_name('Volume-')
+            v_name = rand_name('Volume-%s-') % self._interface
             metadata = {'Type': 'work'}
             #Create volume
             resp, volume = self.client.create_volume(size=1,
@@ -95,8 +95,17 @@
             self.client.wait_for_resource_deletion(volume['id'])
 
 
-class VolumesGetTest(base.BaseCompTest, VolumesGetTestBase):
+class VolumesGetTestXML(base.BaseComputeTestXML, VolumesGetTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumesGetTest, cls).setUpClass()
+        cls._interface = "xml"
+        super(VolumesGetTestXML, cls).setUpClass()
+        cls.client = cls.volumes_extensions_client
+
+
+class VolumesGetTestJSON(base.BaseComputeTestJSON, VolumesGetTestBase):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(VolumesGetTestJSON, cls).setUpClass()
         cls.client = cls.volumes_extensions_client
diff --git a/tempest/tests/compute/volumes/test_volumes_list.py b/tempest/tests/compute/volumes/test_volumes_list.py
index 6ec03ae..fef9c8d 100644
--- a/tempest/tests/compute/volumes/test_volumes_list.py
+++ b/tempest/tests/compute/volumes/test_volumes_list.py
@@ -62,17 +62,19 @@
                                    for m_vol in missing_volumes))
 
 
-class VolumesTest(base.BaseCompTest, VolumesTestBase):
+class VolumesTestXML(base.BaseComputeTestXML, VolumesTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumesTest, cls).setUpClass()
+        cls._interface = 'xml'
+        super(VolumesTestXML, cls).setUpClass()
         cls.client = cls.volumes_extensions_client
         # Create 3 Volumes
-        cls.volume_list = []
-        cls.volume_id_list = []
+        cls.volume_list = list()
+        cls.volume_id_list = list()
         for i in range(3):
-            v_name = rand_name('volume-%s')
+            v_name = rand_name('volume')
             metadata = {'Type': 'work'}
+            v_name += cls._interface
             try:
                 resp, volume = cls.client.create_volume(size=1,
                                                         display_name=v_name,
@@ -103,4 +105,50 @@
         for volume in cls.volume_list:
             resp, _ = cls.client.delete_volume(volume['id'])
             cls.client.wait_for_resource_deletion(volume['id'])
-        super(VolumesTest, cls).tearDownClass()
+        super(VolumesTestXML, cls).tearDownClass()
+
+
+class VolumesTestJSON(base.BaseComputeTestJSON, VolumesTestBase):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = 'json'
+        super(VolumesTestJSON, cls).setUpClass()
+        cls.client = cls.volumes_extensions_client
+        # Create 3 Volumes
+        cls.volume_list = []
+        cls.volume_id_list = []
+        for i in range(3):
+            v_name = rand_name('volume-%s')
+            metadata = {'Type': 'work'}
+            v_name += cls._interface
+            try:
+                resp, volume = cls.client.create_volume(size=1,
+                                                        display_name=v_name,
+                                                        metadata=metadata)
+                cls.client.wait_for_volume_status(volume['id'], 'available')
+                resp, volume = cls.client.get_volume(volume['id'])
+                cls.volume_list.append(volume)
+                cls.volume_id_list.append(volume['id'])
+            except Exception:
+                if cls.volume_list:
+                    # We could not create all the volumes, though we were able
+                    # to create *some* of the volumes. This is typically
+                    # because the backing file size of the volume group is
+                    # too small. So, here, we clean up whatever we did manage
+                    # to create and raise a SkipTest
+                    for volume in cls.volume_list:
+                        cls.client.delete_volume(volume)
+                    msg = ("Failed to create ALL necessary volumes to run "
+                           "test. This typically means that the backing file "
+                           "size of the nova-volumes group is too small to "
+                           "create the 3 volumes needed by this test case")
+                    raise nose.SkipTest(msg)
+                raise
+
+    @classmethod
+    def tearDownClass(cls):
+        # Delete the created Volumes
+        for volume in cls.volume_list:
+            resp, _ = cls.client.delete_volume(volume['id'])
+            cls.client.wait_for_resource_deletion(volume['id'])
+        super(VolumesTestJSON, cls).tearDownClass()
diff --git a/tempest/tests/compute/volumes/test_volumes_negative.py b/tempest/tests/compute/volumes/test_volumes_negative.py
index bdd6b2f..d2ad30e 100644
--- a/tempest/tests/compute/volumes/test_volumes_negative.py
+++ b/tempest/tests/compute/volumes/test_volumes_negative.py
@@ -124,8 +124,19 @@
         resp, volume = self.client.delete_volume('')
 
 
-class VolumesNegativeTest(base.BaseCompTest, VolumesNegativeTestBase):
+class VolumesNegativeTestXML(base.BaseComputeTestXML,
+                             VolumesNegativeTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumesNegativeTest, cls).setUpClass()
+        cls._interface = "xml"
+        super(VolumesNegativeTestXML, cls).setUpClass()
+        cls.client = cls.volumes_extensions_client
+
+
+class VolumesNegativeTestJSON(base.BaseComputeTestJSON,
+                              VolumesNegativeTestBase):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(VolumesNegativeTestJSON, cls).setUpClass()
         cls.client = cls.volumes_extensions_client
diff --git a/tempest/tests/identity/admin/test_roles.py b/tempest/tests/identity/admin/test_roles.py
index 5ebf2ae..f0dd8d9 100644
--- a/tempest/tests/identity/admin/test_roles.py
+++ b/tempest/tests/identity/admin/test_roles.py
@@ -100,10 +100,21 @@
         self.client.delete_role(role1_id)
 
 
-class RolesTest(base.BaseIdentityAdminTest, RolesTestBase):
+class RolesTestJSON(base.BaseIdentityAdminTestJSON,
+                    RolesTestBase):
+
     @classmethod
     def setUpClass(cls):
-        super(RolesTest, cls).setUpClass()
+        super(RolesTestJSON, cls).setUpClass()
+        RolesTestBase.setUpClass(cls)
+
+
+class RolesTestXML(base.BaseIdentityAdminTestXML,
+                   RolesTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(RolesTestXML, cls).setUpClass()
         RolesTestBase.setUpClass(cls)
 
 
@@ -253,8 +264,17 @@
                           tenant['id'], 'junk-role-aabbcc11')
 
 
-class UserRolesTest(RolesTest, UserRolesTestBase):
+class UserRolesTestJSON(RolesTestJSON,
+                        UserRolesTestBase):
 
     @classmethod
     def setUpClass(cls):
-        super(UserRolesTest, cls).setUpClass()
+        super(UserRolesTestJSON, cls).setUpClass()
+
+
+class UserRolesTestXML(RolesTestXML,
+                       UserRolesTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(UserRolesTestXML, cls).setUpClass()
diff --git a/tempest/tests/identity/admin/test_services.py b/tempest/tests/identity/admin/test_services.py
index 7d6cd2a..30dfeb0 100644
--- a/tempest/tests/identity/admin/test_services.py
+++ b/tempest/tests/identity/admin/test_services.py
@@ -18,12 +18,9 @@
 import nose
 
 from tempest.common.utils.data_utils import rand_name
-from tempest import config
 from tempest import exceptions
 from tempest.tests.identity import base
 
-CONF = config.TempestConfig()
-
 
 class ServicesTestBase(object):
 
@@ -68,9 +65,15 @@
                               service_data['id'])
 
 
-class ServicesTest(base.BaseIdentityAdminTest, ServicesTestBase):
+class ServicesTestJSON(base.BaseIdentityAdminTestJSON, ServicesTestBase):
     @classmethod
     def setUpClass(cls):
-        super(ServicesTest, cls).setUpClass()
-        if CONF.general.use_xml:
-            raise nose.SkipTest("Skipping until Bug #1061738 resolved")
+        super(ServicesTestJSON, cls).setUpClass()
+
+
+class ServicesTestXML(base.BaseIdentityAdminTestXML,
+                      ServicesTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(ServicesTestXML, cls).setUpClass()
+        raise nose.SkipTest("Skipping until Bug #1061738 resolved")
diff --git a/tempest/tests/identity/admin/test_tenants.py b/tempest/tests/identity/admin/test_tenants.py
index b6678b8..578af4a 100644
--- a/tempest/tests/identity/admin/test_tenants.py
+++ b/tempest/tests/identity/admin/test_tenants.py
@@ -274,8 +274,16 @@
         self.data.tenants.remove(tenant)
 
 
-class TenantsTest(base.BaseIdentityAdminTest, TenantsTestBase):
+class TenantsTestJSON(base.BaseIdentityAdminTestJSON,
+                      TenantsTestBase):
 
     @classmethod
     def setUpClass(cls):
-        super(TenantsTest, cls).setUpClass()
+        super(TenantsTestJSON, cls).setUpClass()
+
+
+class TenantsTestXML(base.BaseIdentityAdminTestXML, TenantsTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(TenantsTestXML, cls).setUpClass()
diff --git a/tempest/tests/identity/admin/test_users.py b/tempest/tests/identity/admin/test_users.py
index 064f9f8..7ad932b 100644
--- a/tempest/tests/identity/admin/test_users.py
+++ b/tempest/tests/identity/admin/test_users.py
@@ -329,7 +329,14 @@
                       'tenant ids %s' % fail)
 
 
-class UsersTest(base.BaseIdentityAdminTest, UsersTestBase):
+class UsersTestJSON(base.BaseIdentityAdminTestJSON,
+                    UsersTestBase):
     @classmethod
     def setUpClass(cls):
-        super(UsersTest, cls).setUpClass()
+        super(UsersTestJSON, cls).setUpClass()
+
+
+class UsersTestXML(base.BaseIdentityAdminTestXML, UsersTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(UsersTestXML, cls).setUpClass()
diff --git a/tempest/tests/identity/base.py b/tempest/tests/identity/base.py
index a75d830..8fee7ef 100644
--- a/tempest/tests/identity/base.py
+++ b/tempest/tests/identity/base.py
@@ -26,7 +26,7 @@
 
     @classmethod
     def setUpClass(cls):
-        os = clients.IdentityManager()
+        os = clients.IdentityManager(interface=cls._interface)
         cls.client = os.admin_client
         cls.token_client = os.token_client
 
@@ -35,7 +35,7 @@
 
         cls.data = DataGenerator(cls.client)
 
-        os = clients.IdentityNaManager()
+        os = clients.IdentityNaManager(interface=cls._interface)
         cls.non_admin_client = os.admin_client
 
     @classmethod
@@ -69,10 +69,20 @@
             return role[0]
 
 
-class BaseIdentityAdminTest(BaseIdAdminTest):
+class BaseIdentityAdminTestJSON(BaseIdAdminTest):
     @classmethod
     def setUpClass(cls):
-        super(BaseIdentityAdminTest, cls).setUpClass()
+        cls._interface = "json"
+        super(BaseIdentityAdminTestJSON, cls).setUpClass()
+
+BaseIdentityAdminTest = BaseIdentityAdminTestJSON
+
+
+class BaseIdentityAdminTestXML(BaseIdAdminTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "xml"
+        super(BaseIdentityAdminTestXML, cls).setUpClass()
 
 
 class DataGenerator(object):
diff --git a/tempest/tests/volume/admin/base.py b/tempest/tests/volume/admin/base.py
index 38b1e5b..d35efbc 100644
--- a/tempest/tests/volume/admin/base.py
+++ b/tempest/tests/volume/admin/base.py
@@ -42,15 +42,26 @@
                    "in configuration.")
             raise nose.SkipTest(msg)
 
-        if cls.config.general.use_xml:
-            cls.client = volumes_types_xml_client.\
-            VolumeTypesClient(cls.config, cls.adm_user, cls.adm_pass,
-                              cls.auth_url, cls.adm_tenant)
-        else:
-            cls.client = volume_types_json_client.\
-            VolumeTypesClientJSON(cls.config, cls.adm_user, cls.adm_pass,
-                                  cls.auth_url, cls.adm_tenant)
-
     @classmethod
     def tearDownClass(cls):
         super(BaseVolumeAdminTest, cls).tearDownClass()
+
+
+class BaseVolumeAdminTestJSON(BaseVolumeAdminTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(BaseVolumeAdminTestJSON, cls).setUpClass()
+        cls.client = volume_types_json_client.\
+        VolumeTypesClientJSON(cls.config, cls.adm_user, cls.adm_pass,
+                              cls.auth_url, cls.adm_tenant)
+
+
+class BaseVolumeAdminTestXML(BaseVolumeAdminTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "xml"
+        super(BaseVolumeAdminTestXML, cls).setUpClass()
+        cls.client = volume_types_xml_client.\
+        VolumeTypesClientXML(cls.config, cls.adm_user, cls.adm_pass,
+                             cls.auth_url, cls.adm_tenant)
diff --git a/tempest/tests/volume/admin/test_volume_types_extra_specs_negative.py b/tempest/tests/volume/admin/test_volume_types_extra_specs_negative.py
index a59f9d3..d139425 100644
--- a/tempest/tests/volume/admin/test_volume_types_extra_specs_negative.py
+++ b/tempest/tests/volume/admin/test_volume_types_extra_specs_negative.py
@@ -23,7 +23,8 @@
 
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.tests.volume.admin.base import BaseVolumeAdminTest
+from tempest.tests.volume.admin.base import BaseVolumeAdminTestJSON
+from tempest.tests.volume.admin.base import BaseVolumeAdminTestXML
 
 
 class ExtraSpecsNegativeTestBase():
@@ -135,14 +136,29 @@
                                                 str(uuid.uuid4()))
 
 
-class ExtraSpecsNegativeTest(BaseVolumeAdminTest, ExtraSpecsNegativeTestBase):
+class ExtraSpecsNegativeTestXML(BaseVolumeAdminTestXML,
+                                ExtraSpecsNegativeTestBase):
 
     @classmethod
     def setUpClass(cls):
-        super(ExtraSpecsNegativeTest, cls).setUpClass()
+        super(ExtraSpecsNegativeTestXML, cls).setUpClass()
         ExtraSpecsNegativeTestBase.setUpClass(cls)
 
     @classmethod
     def tearDownClass(cls):
-        super(ExtraSpecsNegativeTest, cls).tearDownClass()
+        super(ExtraSpecsNegativeTestXML, cls).tearDownClass()
+        ExtraSpecsNegativeTestBase.tearDownClass(cls)
+
+
+class ExtraSpecsNegativeTestJSON(BaseVolumeAdminTestJSON,
+                                 ExtraSpecsNegativeTestBase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(ExtraSpecsNegativeTestJSON, cls).setUpClass()
+        ExtraSpecsNegativeTestBase.setUpClass(cls)
+
+    @classmethod
+    def tearDownClass(cls):
+        super(ExtraSpecsNegativeTestJSON, cls).tearDownClass()
         ExtraSpecsNegativeTestBase.tearDownClass(cls)
diff --git a/tempest/tests/volume/admin/test_volume_types_negative.py b/tempest/tests/volume/admin/test_volume_types_negative.py
index a7be745..c2daef9 100644
--- a/tempest/tests/volume/admin/test_volume_types_negative.py
+++ b/tempest/tests/volume/admin/test_volume_types_negative.py
@@ -22,7 +22,8 @@
 from nose.tools import raises
 
 from tempest import exceptions
-from tempest.tests.volume.admin.base import BaseVolumeAdminTest
+from tempest.tests.volume.admin.base import BaseVolumeAdminTestJSON
+from tempest.tests.volume.admin.base import BaseVolumeAdminTestXML
 
 
 class VolumeTypesNegativeTestBase():
@@ -59,9 +60,17 @@
         self.client.delete_volume_type(str(uuid.uuid4()))
 
 
-class VolumesTypesNegativeTest(BaseVolumeAdminTest,
-                               VolumeTypesNegativeTestBase):
+class VolumesTypesNegativeTestXML(BaseVolumeAdminTestXML,
+                                  VolumeTypesNegativeTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumesTypesNegativeTest, cls).setUpClass()
+        super(VolumesTypesNegativeTestXML, cls).setUpClass()
+        VolumeTypesNegativeTestBase.setUpClass(cls)
+
+
+class VolumesTypesNegativeTestJSON(BaseVolumeAdminTestJSON,
+                                   VolumeTypesNegativeTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(VolumesTypesNegativeTestJSON, cls).setUpClass()
         VolumeTypesNegativeTestBase.setUpClass(cls)
diff --git a/tempest/tests/volume/base.py b/tempest/tests/volume/base.py
index 9420d43..8657db8 100644
--- a/tempest/tests/volume/base.py
+++ b/tempest/tests/volume/base.py
@@ -146,3 +146,17 @@
                 condition()
                 return
             time.sleep(self.build_interval)
+
+
+class BaseVolumeTestJSON(BaseVolumeTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(BaseVolumeTestJSON, cls).setUpClass()
+
+
+class BaseVolumeTestXML(BaseVolumeTest):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "xml"
+        super(BaseVolumeTestXML, cls).setUpClass()
diff --git a/tempest/tests/volume/test_volumes_get.py b/tempest/tests/volume/test_volumes_get.py
index 054f0a9..bc64ff4 100644
--- a/tempest/tests/volume/test_volumes_get.py
+++ b/tempest/tests/volume/test_volumes_get.py
@@ -95,8 +95,17 @@
                 self.client.wait_for_resource_deletion(volume['id'])
 
 
-class VolumesGetTest(base.BaseVolumeTest, VolumesGetTestBase):
+class VolumesGetTestXML(base.BaseVolumeTestXML, VolumesGetTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumesGetTest, cls).setUpClass()
+        cls._interface = "xml"
+        super(VolumesGetTestXML, cls).setUpClass()
+        cls.client = cls.volumes_client
+
+
+class VolumesGetTestJSON(base.BaseVolumeTestJSON, VolumesGetTestBase):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = "json"
+        super(VolumesGetTestJSON, cls).setUpClass()
         cls.client = cls.volumes_client
diff --git a/tempest/tests/volume/test_volumes_list.py b/tempest/tests/volume/test_volumes_list.py
index 3f0bcee..2fc1353 100644
--- a/tempest/tests/volume/test_volumes_list.py
+++ b/tempest/tests/volume/test_volumes_list.py
@@ -59,10 +59,11 @@
                                    for m_vol in missing_vols))
 
 
-class VolumeListTest(base.BaseVolumeTest, VolumesListTestBase):
+class VolumeListTestXML(base.BaseVolumeTestXML, VolumesListTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumeListTest, cls).setUpClass()
+        cls._interface = 'xml'
+        super(VolumeListTestXML, cls).setUpClass()
         cls.client = cls.volumes_client
 
         # Create 3 test volumes
@@ -102,4 +103,51 @@
         for volid in cls.volume_id_list:
             resp, _ = cls.client.delete_volume(volid)
             cls.client.wait_for_resource_deletion(volid)
-        super(VolumeListTest, cls).tearDownClass()
+        super(VolumeListTestXML, cls).tearDownClass()
+
+
+class VolumeListTestJSON(base.BaseVolumeTestJSON, VolumesListTestBase):
+    @classmethod
+    def setUpClass(cls):
+        cls._interface = 'json'
+        super(VolumeListTestJSON, cls).setUpClass()
+        cls.client = cls.volumes_client
+
+        # Create 3 test volumes
+        cls.volume_list = []
+        cls.volume_id_list = []
+        for i in range(3):
+            v_name = rand_name('volume')
+            metadata = {'Type': 'work'}
+            try:
+                resp, volume = cls.client.create_volume(size=1,
+                                                        display_name=v_name,
+                                                        metadata=metadata)
+                cls.client.wait_for_volume_status(volume['id'], 'available')
+                resp, volume = cls.client.get_volume(volume['id'])
+                cls.volume_list.append(volume)
+                cls.volume_id_list.append(volume['id'])
+            except Exception:
+                if cls.volume_list:
+                    # We could not create all the volumes, though we were able
+                    # to create *some* of the volumes. This is typically
+                    # because the backing file size of the volume group is
+                    # too small. So, here, we clean up whatever we did manage
+                    # to create and raise a SkipTest
+                    for volid in cls.volume_id_list:
+                        cls.client.delete_volume(volid)
+                        cls.client.wait_for_resource_deletion(volid)
+                    msg = ("Failed to create ALL necessary volumes to run "
+                           "test. This typically means that the backing file "
+                           "size of the nova-volumes group is too small to "
+                           "create the 3 volumes needed by this test case")
+                    raise nose.SkipTest(msg)
+                raise
+
+    @classmethod
+    def tearDownClass(cls):
+        # Delete the created volumes
+        for volid in cls.volume_id_list:
+            resp, _ = cls.client.delete_volume(volid)
+            cls.client.wait_for_resource_deletion(volid)
+        super(VolumeListTestJSON, cls).tearDownClass()
diff --git a/tempest/tests/volume/test_volumes_negative.py b/tempest/tests/volume/test_volumes_negative.py
index 0474eac..6bd7002 100644
--- a/tempest/tests/volume/test_volumes_negative.py
+++ b/tempest/tests/volume/test_volumes_negative.py
@@ -114,8 +114,16 @@
         resp, volume = self.client.delete_volume('')
 
 
-class VolumesNegativeTest(base.BaseVolumeTest, VolumesNegativeTestBase):
+class VolumesNegativeTestXML(base.BaseVolumeTestXML, VolumesNegativeTestBase):
     @classmethod
     def setUpClass(cls):
-        super(VolumesNegativeTest, cls).setUpClass()
+        super(VolumesNegativeTestXML, cls).setUpClass()
+        cls.client = cls.volumes_client
+
+
+class VolumesNegativeTestJSON(base.BaseVolumeTestJSON,
+                              VolumesNegativeTestBase):
+    @classmethod
+    def setUpClass(cls):
+        super(VolumesNegativeTestJSON, cls).setUpClass()
         cls.client = cls.volumes_client