diff --git a/zaza/openstack/charm_tests/series_upgrade/tests.py b/zaza/openstack/charm_tests/series_upgrade/tests.py
index 239681f..9e72338 100644
--- a/zaza/openstack/charm_tests/series_upgrade/tests.py
+++ b/zaza/openstack/charm_tests/series_upgrade/tests.py
@@ -65,7 +65,7 @@ class SeriesUpgradeTest(unittest.TestCase):
 
         applications = model.get_status().applications
         completed_machines = []
-        for application, app_details in applications:
+        for application, app_details in applications.items():
             # Skip subordinates
             if app_details["subordinate-to"]:
                 continue