diff --git a/tempest/api/compute/volumes/test_attach_volume_negative.py b/tempest/api/compute/volumes/test_attach_volume_negative.py
index eabb907..7a74869 100644
--- a/tempest/api/compute/volumes/test_attach_volume_negative.py
+++ b/tempest/api/compute/volumes/test_attach_volume_negative.py
@@ -41,3 +41,18 @@
 
         self.assertRaises(lib_exc.BadRequest,
                           self.delete_volume, volume['id'])
+
+    @decorators.attr(type=['negative'])
+    @decorators.idempotent_id('aab919e2-d992-4cbb-a4ed-745c2475398c')
+    def test_attach_attached_volume_to_same_server(self):
+        # Test attaching the same volume to the same instance once
+        # it's already attached. The nova/cinder validation for this differs
+        # depending on whether or not cinder v3.27 is being used to attach
+        # the volume to the instance.
+        server = self.create_test_server(wait_until='ACTIVE')
+        volume = self.create_volume()
+
+        self.attach_volume(server, volume)
+
+        self.assertRaises(lib_exc.BadRequest,
+                          self.attach_volume, server, volume)
diff --git a/tempest/api/identity/admin/v3/test_inherits.py b/tempest/api/identity/admin/v3/test_inherits.py
index c0c79b9..68c0225 100644
--- a/tempest/api/identity/admin/v3/test_inherits.py
+++ b/tempest/api/identity/admin/v3/test_inherits.py
@@ -36,20 +36,19 @@
             data_utils.rand_name('project-'),
             description=data_utils.rand_name('project-desc-'),
             domain_id=cls.domain['id'])['project']
+        cls.addClassResourceCleanup(cls.projects_client.delete_project,
+                                    cls.project['id'])
         cls.group = cls.groups_client.create_group(
             name=data_utils.rand_name('group-'), project_id=cls.project['id'],
             domain_id=cls.domain['id'])['group']
+        cls.addClassResourceCleanup(cls.groups_client.delete_group,
+                                    cls.group['id'])
         cls.user = cls.users_client.create_user(
             name=u_name, description=u_desc, password=u_password,
             email=u_email, project_id=cls.project['id'],
             domain_id=cls.domain['id'])['user']
-
-    @classmethod
-    def resource_cleanup(cls):
-        cls.groups_client.delete_group(cls.group['id'])
-        cls.users_client.delete_user(cls.user['id'])
-        cls.projects_client.delete_project(cls.project['id'])
-        super(InheritsV3TestJSON, cls).resource_cleanup()
+        cls.addClassResourceCleanup(cls.users_client.delete_user,
+                                    cls.user['id'])
 
     def _list_assertions(self, body, fetched_role_ids, role_id):
         self.assertEqual(len(body), 1)