diff --git a/networking_cisco/tests/unit/cisco/device_manager/test_vif_hotplug_plugging_driver.py b/networking_cisco/tests/unit/cisco/device_manager/test_vif_hotplug_plugging_driver.py
index <HASH>..<HASH> 100644
--- a/networking_cisco/tests/unit/cisco/device_manager/test_vif_hotplug_plugging_driver.py
+++ b/networking_cisco/tests/unit/cisco/device_manager/test_vif_hotplug_plugging_driver.py
@@ -135,5 +135,5 @@ class TestVIFHotPlugPluggingDriver(base.BaseTestCase):
             self.assertEqual(1, mocked_plugin.create_port.call_count)
             self.assertEqual(True, mock_delete_resources.called)
             self.assertEqual(1, mock_delete_resources.call_count)
-            self.assertEqual(None, result['mgmt_port'])
+            self.assertIsNone(result['mgmt_port'])
             self.assertEqual([], result['ports'])
Replace assertEqual(None, *) with assertIsNone in tests

Replace assertEqual(None, *) with assertIsNone in tests to have
more clear messages in case of failure.

Change-Id: Id7b3df<I>d6a5ae3f0c<I>a5b8d<I>e<I>f<I>b
Closes-bug: #<I>