diff --git a/tox.ini b/tox.ini
index 5f5ed9cdc3..dcc4331741 100644
--- a/tox.ini
+++ b/tox.ini
@@ -40,7 +40,7 @@ deps = -r{toxinidir}/requirements.txt
 commands = {posargs}
 
 [flake8]
-ignore = E125,F403,H301,H302,H304,H306
+ignore = E125,F403,H301,H302,H306
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,tools,nova_tests
 show-source = True