diff --git a/tox.ini b/tox.ini
index 71bc252..b349f63 100644
--- a/tox.ini
+++ b/tox.ini
@@ -44,8 +44,6 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 commands = oslo_debug_helper {posargs}
 
 [flake8]
-# E123, E125 skipped as they are invalid PEP-8.
 show-source = True
-ignore = E123,E125
 builtins = _
 exclude=.venv,.git,.tox,dist,doc/*,*lib/python*,*egg,build