diff --git a/api/controller/image_unittest.py b/api/controller/image_unittest.py
index 1013244..75e71ec 100644
--- a/api/controller/image_unittest.py
+++ b/api/controller/image_unittest.py
@@ -7,9 +7,10 @@
 
 from __future__ import print_function
 
-import mock
 import os
 
+import mock
+
 from chromite.api import api_config
 from chromite.api import controller
 from chromite.api.controller import image as image_controller