diff --git a/patrole_tempest_plugin/rbac_utils.py b/patrole_tempest_plugin/rbac_utils.py
index 6db2199..b7ac8d9 100644
--- a/patrole_tempest_plugin/rbac_utils.py
+++ b/patrole_tempest_plugin/rbac_utils.py
@@ -23,6 +23,7 @@
 from tempest import clients
 from tempest.common import credentials_factory as credentials
 from tempest import config
+from tempest.lib import exceptions as lib_exc
 
 from patrole_tempest_plugin import rbac_exceptions
 
@@ -50,10 +51,11 @@
         # Intialize the admin roles_client to perform role switching.
         admin_mgr = clients.Manager(
             credentials.get_configured_admin_credentials())
-        if test_obj.get_identity_version() == 'v3':
+        if CONF.identity_feature_enabled.api_v3:
             admin_roles_client = admin_mgr.roles_v3_client
         else:
-            admin_roles_client = admin_mgr.roles_client
+            raise lib_exc.InvalidConfiguration(
+                "Patrole role overriding only supports v3 identity API.")
 
         self.admin_roles_client = admin_roles_client
         self._override_role(test_obj, False)
diff --git a/patrole_tempest_plugin/tests/unit/fixtures.py b/patrole_tempest_plugin/tests/unit/fixtures.py
index 4552224..aee36fa 100644
--- a/patrole_tempest_plugin/tests/unit/fixtures.py
+++ b/patrole_tempest_plugin/tests/unit/fixtures.py
@@ -69,12 +69,13 @@
         self.useFixture(ConfPatcher(rbac_test_role='member', group='patrole'))
         self.useFixture(ConfPatcher(
             admin_role='admin', auth_version='v3', group='identity'))
+        self.useFixture(ConfPatcher(
+            api_v3=True, group='identity-feature-enabled'))
 
         test_obj_kwargs = {
             'os_primary.credentials.user_id': self.USER_ID,
             'os_primary.credentials.tenant_id': self.PROJECT_ID,
             'os_primary.credentials.project_id': self.PROJECT_ID,
-            'get_identity_version.return_value': 'v3'
         }
         self.mock_test_obj = mock.Mock(
             __name__='patrole_unit_test', spec=test.BaseTestCase,