diff --git a/mayan/settings/development_ddt.py b/mayan/settings/development_ddt.py
index 8be98105bc..49804baca4 100644
--- a/mayan/settings/development_ddt.py
+++ b/mayan/settings/development_ddt.py
@@ -27,4 +27,4 @@ TEMPLATE_CONTEXT_PROCESSORS += ('django.core.context_processors.debug',)
 
 WSGI_AUTO_RELOAD = True
 
-MIDDLEWARE_CLASSES += ('debug_toolbar.middleware.DebugToolbarMiddleware',)
+MIDDLEWARE_CLASSES = ('debug_toolbar.middleware.DebugToolbarMiddleware',) + MIDDLEWARE_CLASSES