diff --git a/designateclient/tests/test_v1/__init__.py b/designateclient/tests/test_v1/__init__.py
index cd2f8a1..3654a91 100644
--- a/designateclient/tests/test_v1/__init__.py
+++ b/designateclient/tests/test_v1/__init__.py
@@ -46,7 +46,7 @@ class CrudMixin(object):
     def assertList(self, expected, actual):
         self.assertEqual(len(expected), len(actual))
         for i in expected:
-            self.assertTrue(i in actual)
+            self.assertIn(i, actual)
 
 
 class APIV1TestCase(base.APITestCase):
diff --git a/designateclient/tests/v2/__init__.py b/designateclient/tests/v2/__init__.py
index 288b78e..f870d15 100644
--- a/designateclient/tests/v2/__init__.py
+++ b/designateclient/tests/v2/__init__.py
@@ -46,7 +46,7 @@ class CrudMixin(object):
     def assertList(self, expected, actual):
         self.assertEqual(len(expected), len(actual))
         for i in expected:
-            self.assertTrue(i in actual)
+            self.assertIn(i, actual)
 
 
 class APIV2TestCase(base.APITestCase):