diff --git a/ceilometer/tests/hardware/pollsters/test_util.py b/ceilometer/tests/hardware/pollsters/test_util.py
index d6e5c736d..247492a16 100644
--- a/ceilometer/tests/hardware/pollsters/test_util.py
+++ b/ceilometer/tests/hardware/pollsters/test_util.py
@@ -51,7 +51,7 @@ class TestPollsterUtils(test_base.BaseTestCase):
                                        unit='B',
                                        volume=1,
                                        extra=extra)
-        self.assertEqual(None, s.user_id)
+        self.assertIsNone(s.user_id)
         self.assertEqual('project', s.project_id)
         self.assertEqual('resource', s.resource_id)
         self.assertEqual({'resource_url': 'snmp://127.0.0.1:161',