diff --git a/tox.ini b/tox.ini
index 130271caf..766798e35 100644
--- a/tox.ini
+++ b/tox.ini
@@ -76,7 +76,7 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 # reason: no improvement in readability
 show-source = True
 ignore = E251
-enable-extensions=H106,H203
+enable-extensions=H106,H203,H204,H205
 builtins = _
 exclude=.venv,.git,.tox,dist,*lib/python*,*egg,build
 max-complexity=30