diff --git a/tempest/api/compute/admin/test_delete_server.py b/tempest/api/compute/admin/test_delete_server.py
index 2569161..83444b9 100644
--- a/tempest/api/compute/admin/test_delete_server.py
+++ b/tempest/api/compute/admin/test_delete_server.py
@@ -29,7 +29,7 @@
     def setup_clients(cls):
         super(DeleteServersAdminTestJSON, cls).setup_clients()
         cls.non_admin_client = cls.servers_client
-        cls.admin_client = cls.os_adm.servers_client
+        cls.admin_client = cls.os_admin.servers_client
 
     @decorators.idempotent_id('99774678-e072-49d1-9d2a-49a59bc56063')
     def test_delete_server_while_in_error_state(self):
diff --git a/tempest/api/compute/admin/test_servers.py b/tempest/api/compute/admin/test_servers.py
index a492b43..789049b 100644
--- a/tempest/api/compute/admin/test_servers.py
+++ b/tempest/api/compute/admin/test_servers.py
@@ -133,7 +133,7 @@
         # self.create_test_server() here as this method creates the server
         # in the "primary" (i.e non-admin) tenant.
         test_server, _ = compute.create_test_server(
-            self.os_adm, wait_until="ACTIVE", name=name, **network_kwargs)
+            self.os_admin, wait_until="ACTIVE", name=name, **network_kwargs)
         self.addCleanup(self.client.delete_server, test_server['id'])
         server = self.client.show_server(test_server['id'])['server']
         self.assertEqual(server['status'], 'ACTIVE')
diff --git a/tempest/api/image/v1/test_images.py b/tempest/api/image/v1/test_images.py
index b341ab7..76723f4 100644
--- a/tempest/api/image/v1/test_images.py
+++ b/tempest/api/image/v1/test_images.py
@@ -43,7 +43,8 @@
         else:
             msg = ("The container format and the disk format don't match. "
                    "Container format: %(container)s, Disk format: %(disk)s." %
-                   {'container': container_format, 'disk': disk_format})
+                   {'container': container_format, 'disk':
+                       CONF.image.disk_formats})
             raise exceptions.InvalidConfiguration(msg)
     else:
         disk_format = CONF.image.disk_formats[0]
diff --git a/tempest/api/volume/admin/test_volume_quota_classes.py b/tempest/api/volume/admin/test_volume_quota_classes.py
index 016d87a..b8a61fd 100644
--- a/tempest/api/volume/admin/test_volume_quota_classes.py
+++ b/tempest/api/volume/admin/test_volume_quota_classes.py
@@ -73,7 +73,7 @@
 
         # Verify current project's default quotas
         default_quotas = self.admin_quotas_client.show_default_quota_set(
-            self.os_adm.credentials.tenant_id)['quota_set']
+            self.os_admin.credentials.tenant_id)['quota_set']
         self.assertThat(default_quotas.items(),
                         matchers.ContainsAll(body.items()))
 
diff --git a/tempest/test.py b/tempest/test.py
index e8108f4..f07c071 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -373,9 +373,9 @@
     @classmethod
     def resource_setup(cls):
         """Class level resource setup for test cases."""
-        if hasattr(cls, "os"):
+        if hasattr(cls, "os_primary"):
             cls.validation_resources = vresources.create_validation_resources(
-                cls.os, cls.validation_resources)
+                cls.os_primary, cls.validation_resources)
         else:
             LOG.warning("Client manager not found, validation resources not"
                         " created")
@@ -388,8 +388,8 @@
         resources, in case a failure during `resource_setup` should happen.
         """
         if cls.validation_resources:
-            if hasattr(cls, "os"):
-                vresources.clear_validation_resources(cls.os,
+            if hasattr(cls, "os_primary"):
+                vresources.clear_validation_resources(cls.os_primary,
                                                       cls.validation_resources)
                 cls.validation_resources = {}
             else: