diff --git a/tempest/api/data_processing/test_cluster_templates.py b/tempest/api/data_processing/test_cluster_templates.py
index e5c6303..ad9ed2a 100644
--- a/tempest/api/data_processing/test_cluster_templates.py
+++ b/tempest/api/data_processing/test_cluster_templates.py
@@ -22,6 +22,7 @@
     sahara/restapi/rest_api_v1.0.html#cluster-templates
     """
     @classmethod
+    @test.safe_setup
     def setUpClass(cls):
         super(ClusterTemplateTest, cls).setUpClass()
         # create node group template
@@ -39,6 +40,7 @@
             }
         }
         resp_body = cls.create_node_group_template(**node_group_template)[1]
+        node_group_template_id = resp_body['id']
 
         cls.full_cluster_template = {
             'description': 'Test cluster template',
@@ -65,7 +67,7 @@
                 },
                 {
                     'name': 'worker-node',
-                    'node_group_template_id': resp_body['id'],
+                    'node_group_template_id': node_group_template_id,
                     'count': 3
                 }
             ]
diff --git a/tempest/api/data_processing/test_data_sources.py b/tempest/api/data_processing/test_data_sources.py
index c72e828..345153b 100644
--- a/tempest/api/data_processing/test_data_sources.py
+++ b/tempest/api/data_processing/test_data_sources.py
@@ -14,11 +14,8 @@
 
 from tempest.api.data_processing import base as dp_base
 from tempest.common.utils import data_utils
-from tempest import config
 from tempest import test
 
-CONF = config.CONF
-
 
 class DataSourceTest(dp_base.BaseDataProcessingTest):
     @classmethod
@@ -28,8 +25,8 @@
             'url': 'swift://sahara-container.sahara/input-source',
             'description': 'Test data source',
             'credentials': {
-                'user': CONF.identity.username,
-                'password': CONF.identity.password
+                'user': cls.os.credentials.username,
+                'password': cls.os.credentials.password
             },
             'type': 'swift'
         }