diff --git a/test/unit/common/middleware/test_keystoneauth.py b/test/unit/common/middleware/test_keystoneauth.py
index 388e7955b8..90fbffdaf3 100644
--- a/test/unit/common/middleware/test_keystoneauth.py
+++ b/test/unit/common/middleware/test_keystoneauth.py
@@ -623,7 +623,7 @@ class TestAuthorize(BaseTestAuthorize):
         elif exception:
             self.assertEqual(result.status_int, exception)
         else:
-            self.assertTrue(result is None)
+            self.assertIsNone(result)
         return req
 
     def test_authorize_fails_for_unauthorized_user(self):