diff --git a/tempest/api/identity/admin/v3/test_endpoint_groups.py b/tempest/api/identity/admin/v3/test_endpoint_groups.py
index 5cd456c..49dbba1 100644
--- a/tempest/api/identity/admin/v3/test_endpoint_groups.py
+++ b/tempest/api/identity/admin/v3/test_endpoint_groups.py
@@ -54,17 +54,17 @@
         super(EndPointGroupsTest, cls).resource_cleanup()
 
     @classmethod
-    def _create_service(self):
+    def _create_service(cls):
         s_name = data_utils.rand_name('service')
         s_type = data_utils.rand_name('type')
         s_description = data_utils.rand_name('description')
         service_data = (
-            self.services_client.create_service(name=s_name,
-                                                type=s_type,
-                                                description=s_description))
+            cls.services_client.create_service(name=s_name,
+                                               type=s_type,
+                                               description=s_description))
 
         service_id = service_data['service']['id']
-        self.service_ids.append(service_id)
+        cls.service_ids.append(service_id)
         return service_id
 
     @decorators.idempotent_id('7c69e7a1-f865-402d-a2ea-44493017315a')