diff --git a/tox.ini b/tox.ini
index 80d2697..da2cbdf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -99,8 +99,10 @@ commands = bandit -c bandit.yaml -r sahara -n5 -p sahara_default -x tests
 show-source = true
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
-# [H904] Delay string interpolations at logging calls.
-enable-extensions=H904
+# [H904] Delay string interpolations at logging calls
+# [H106] Don’t put vim configuration in source files
+# [H203] Use assertIs(Not)None to check for None.
+enable-extensions=H904,H106,H203
 
 [hacking]
 import_exceptions = sahara.i18n