diff --git a/keystone/tests/test_pemutils.py b/keystone/tests/test_pemutils.py
index 5ce6543983..b409e28735 100644
--- a/keystone/tests/test_pemutils.py
+++ b/keystone/tests/test_pemutils.py
@@ -256,7 +256,7 @@ class TestPEMParse(tests.TestCase):
         text += 'burfl blatz bingo\n'
 
         data = pemutils.get_pem_data(text)
-        self.assertEqual(None, data)
+        self.assertIsNone(data)
 
     def test_get_pem_data_invalid(self):
         p = PEM(pem_type='xxx',