diff --git a/zaza/openstack/charm_tests/test_utils.py b/zaza/openstack/charm_tests/test_utils.py
index 1f68c68..eef3b77 100644
--- a/zaza/openstack/charm_tests/test_utils.py
+++ b/zaza/openstack/charm_tests/test_utils.py
@@ -152,7 +152,7 @@ class OpenStackBaseTest(unittest.TestCase):
 
         keys = keys or _app_config.keys()
         return {
-            str(k): _app_config.get(k, {}).get('value', '')
+            k: _app_config.get(k, {}).get('value', '')
             for k in keys
         }