diff --git a/tox.ini b/tox.ini
index 433c55f..e2dbdc8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,4 +15,4 @@
 
 [testenv:pep8]
 deps = pep8==1.3.3
-commands = pep8 --ignore=E121,E122,E125,E126 --repeat --show-source --exclude=.venv,.tox,dist,doc,openstack .
+commands = python tools/hacking.py --ignore=N4,E121,E122,E125,E126 --repeat --show-source --exclude=.venv,.tox,dist,doc,openstack .