diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index 4995209..9f1a548 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -352,10 +352,10 @@
 
     @classmethod
     def skip_checks(cls):
+        super(BaseComputeAdminTest, cls).skip_checks()
         if not credentials.is_admin_available():
             msg = ("Missing Identity Admin API credentials in configuration.")
             raise cls.skipException(msg)
-        super(BaseComputeAdminTest, cls).skip_checks()
 
     @classmethod
     def setup_credentials(cls):
diff --git a/tempest/api/volume/base.py b/tempest/api/volume/base.py
index 1f76b1c..28676b0 100644
--- a/tempest/api/volume/base.py
+++ b/tempest/api/volume/base.py
@@ -18,6 +18,7 @@
 from tempest_lib import exceptions as lib_exc
 
 from tempest import clients
+from tempest.common import credentials
 from tempest.common import fixed_network
 from tempest import config
 from tempest import exceptions
@@ -175,14 +176,17 @@
     """Base test case class for all Volume Admin API tests."""
 
     @classmethod
+    def skip_checks(cls):
+        super(BaseVolumeAdminTest, cls).skip_checks()
+        if not credentials.is_admin_available():
+            msg = ("Missing Identity Admin API credentials in configuration.")
+            raise cls.skipException(msg)
+
+    @classmethod
     def setup_credentials(cls):
         super(BaseVolumeAdminTest, cls).setup_credentials()
-        try:
-            cls.adm_creds = cls.isolated_creds.get_admin_creds()
-            cls.os_adm = clients.Manager(credentials=cls.adm_creds)
-        except NotImplementedError:
-            msg = "Missing Volume Admin API credentials in configuration."
-            raise cls.skipException(msg)
+        cls.adm_creds = cls.isolated_creds.get_admin_creds()
+        cls.os_adm = clients.Manager(credentials=cls.adm_creds)
 
     @classmethod
     def setup_clients(cls):
diff --git a/tempest/scenario/test_aggregates_basic_ops.py b/tempest/scenario/test_aggregates_basic_ops.py
index 92e6c74..c5e8012 100644
--- a/tempest/scenario/test_aggregates_basic_ops.py
+++ b/tempest/scenario/test_aggregates_basic_ops.py
@@ -16,6 +16,7 @@
 from oslo_log import log as logging
 from tempest_lib.common.utils import data_utils
 
+from tempest.common import credentials
 from tempest.common import tempest_fixtures as fixtures
 from tempest.scenario import manager
 from tempest import test
@@ -34,6 +35,13 @@
     Deletes aggregate
     """
     @classmethod
+    def skip_checks(cls):
+        super(TestAggregatesBasicOps, cls).skip_checks()
+        if not credentials.is_admin_available():
+            msg = ("Missing Identity Admin API credentials in configuration.")
+            raise cls.skipException(msg)
+
+    @classmethod
     def setup_clients(cls):
         super(TestAggregatesBasicOps, cls).setup_clients()
         cls.aggregates_client = cls.manager.aggregates_client
diff --git a/tempest/test.py b/tempest/test.py
index da936b4..4451610 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -467,8 +467,6 @@
         super(NegativeAutoTest, cls).setUpClass()
         os = cls.get_client_manager()
         cls.client = os.negative_client
-        os_admin = clients.AdminManager(service=cls._service)
-        cls.admin_client = os_admin.negative_client
 
     @staticmethod
     def load_tests(*args):
@@ -596,7 +594,13 @@
                             "mechanism")
 
         if "admin_client" in description and description["admin_client"]:
-            client = self.admin_client
+            if not credentials.is_admin_available():
+                msg = ("Missing Identity Admin API credentials in"
+                       "configuration.")
+                raise self.skipException(msg)
+            creds = self.isolated_creds.get_admin_creds()
+            os_adm = clients.Manager(credentials=creds)
+            client = os_adm.negative_client
         else:
             client = self.client
         resp, resp_body = client.send_request(method, new_url,