diff --git a/mayan/settings/development_ddt.py b/mayan/settings/development_ddt.py
index 2e1fbc32d9..608e498126 100644
--- a/mayan/settings/development_ddt.py
+++ b/mayan/settings/development_ddt.py
@@ -3,7 +3,7 @@ from __future__ import absolute_import, unicode_literals
 from .development import *  # NOQA
 
 INSTALLED_APPS += (
-    'debug_toolbar'
+    'debug_toolbar',
 )
 
 # Stop debug toolbar patching!