diff --git a/test/registry_tests.py b/test/registry_tests.py
index a59074142..9d1d03d68 100644
--- a/test/registry_tests.py
+++ b/test/registry_tests.py
@@ -218,7 +218,7 @@ class V1RegistryPushMixin(V1RegistryMixin):
     self.v1_ping()
 
     # PUT /v1/repositories/{namespace}/{repository}/
-    data = [{"id": image['id']} for image in images]
+    data = [{"id": image_id} for image_id, _ in images.iteritems()]
     self.conduct('PUT', '/v1/repositories/%s/%s' % (namespace, repository),
                  data=json.dumps(data), auth=auth,
                  expected_code=201)