diff --git a/tox.ini b/tox.ini
index 6e03d48640..c8509115bd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,6 +34,5 @@ downloadcache = ~/cache/pip
 commands = python setup.py build_sphinx
 
 [flake8]
-ignore = H305,H307,H402,H904
 show-source = True
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools