diff --git a/tox.ini b/tox.ini
index 5509599..0514707 100644
--- a/tox.ini
+++ b/tox.ini
@@ -70,15 +70,12 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 # H803 git commit title should not end with period
 # reason: removed in hacking (https://review.openstack.org/#/c/101498/)
 #
-# H904 wrap long lines in parentheses instead of a backslash
-# reason: removed in hacking (https://review.openstack.org/#/c/101701/)
-#
 # Due to the upgrade to hacking 0.9.2 the following checking are
 # ignored on purpose for the moment and should be re-enabled.
 
 
 show-source = True
-ignore = E251,H904
+ignore = E251
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 max-complexity=30