diff --git a/tox.ini b/tox.ini
index 9936394a..193dac9e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -52,9 +52,12 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 #
 # Due to the upgrade to hacking 0.9.2 the following checking are
 # ignored on purpose for the moment and should be re-enabled.
+# H106: Don’t put vim configuration in source files
+# H203: Use assertIs(Not)None to check for None
 
 show-source = True
 ignore = E123,E125,E126,E127,E128,E251,E265,H302,H405,H904,H404
+enable-extensions=H106,H203
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 max-complexity=30