diff --git a/tempest/api/data_processing/base.py b/tempest/api/data_processing/base.py
index 5a903b7..904cbb6 100644
--- a/tempest/api/data_processing/base.py
+++ b/tempest/api/data_processing/base.py
@@ -225,6 +225,8 @@
 
 class BaseDataProcessingTest(tempest.test.BaseTestCase):
 
+    credentials = ['primary']
+
     @classmethod
     def skip_checks(cls):
         super(BaseDataProcessingTest, cls).skip_checks()
@@ -233,11 +235,6 @@
         cls.default_plugin = cls._get_default_plugin()
 
     @classmethod
-    def setup_credentials(cls):
-        super(BaseDataProcessingTest, cls).setup_credentials()
-        cls.os = cls.get_client_manager()
-
-    @classmethod
     def setup_clients(cls):
         super(BaseDataProcessingTest, cls).setup_clients()
         cls.client = cls.os.data_processing_client