diff --git a/tox.ini b/tox.ini
index 9b864a96..2c7e2df2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,7 +47,7 @@ commands = {posargs}
 [flake8]
 # E711: ignored because it is normal to use "column == None" in sqlalchemy
 # TODO(yuriyz): Analyze or fix the warnings blacklisted below
-ignore = E12,E111,E113,E131,E265,E711,F812,H305
+ignore = E12,E111,E113,E131,E265,E711,F812
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools,*ironic/nova*
 
 [hacking]