diff --git a/oslo/messaging/notify/dispatcher.py b/oslo/messaging/notify/dispatcher.py
index 098e6b18c..f3944095b 100644
--- a/oslo/messaging/notify/dispatcher.py
+++ b/oslo/messaging/notify/dispatcher.py
@@ -103,7 +103,7 @@ class NotificationDispatcher(object):
         publisher_id = message.get('publisher_id')
         event_type = message.get('event_type')
         metadata = {
-            'message_id':  message.get('message_id'),
+            'message_id': message.get('message_id'),
             'timestamp': message.get('timestamp')
         }
         priority = message.get('priority', '').lower()
diff --git a/tox.ini b/tox.ini
index 9e52f5521..6b262c550 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,7 +25,7 @@ commands = python setup.py build_sphinx
 
 [flake8]
 show-source = True
-ignore = E241,E265,E714,H237,H402,H405,H904
+ignore = E265,E714,H237,H402,H405,H904
 exclude = .tox,dist,doc,*.egg,build,__init__.py
 builtins = _