diff --git a/tox.ini b/tox.ini
index 823b6b2e3..1c490a6bf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,7 @@ downloadcache = ~/cache/pip
 [testenv:pep8]
 deps = pep8
        setuptools_git>=0.4
-commands = pep8 --repeat --show-source --ignore=E125 --exclude=.venv,.tox,dist,doc,*egg .
+commands = pep8 --repeat --show-source --ignore=E125 --exclude=.venv,.tox,dist,doc,openstack,*egg .
 
 [testenv:cover]
 setenv = NOSE_WITH_COVERAGE=1