diff --git a/endpoints/api/suconfig_models_interface.py b/endpoints/api/suconfig_models_interface.py
index 13cd1e774..9f8cbd0cb 100644
--- a/endpoints/api/suconfig_models_interface.py
+++ b/endpoints/api/suconfig_models_interface.py
@@ -1,11 +1,13 @@
 from abc import ABCMeta, abstractmethod
 from six import add_metaclass
 
+
 @add_metaclass(ABCMeta)
 class SuperuserConfigDataInterface(object):
   """
   Interface that represents all data store interactions required by the superuser config API.
   """
+
   @abstractmethod
   def is_valid(self):
     """