diff --git a/unit_tests/test_cinder_backup_handlers.py b/unit_tests/test_cinder_backup_handlers.py
index 7075eed..a71f091 100644
--- a/unit_tests/test_cinder_backup_handlers.py
+++ b/unit_tests/test_cinder_backup_handlers.py
@@ -108,4 +108,4 @@ class TestCinderBackupSwiftHandlers(unittest.TestCase):
 
             for f, args in t.items():
                 # check that function is in patterns
-                self.assertTrue(f in p.keys())
+                self.assertIn(f, p.keys())