diff --git a/tox.ini b/tox.ini
index 0565446828..f787ccc05e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,7 +20,7 @@ downloadcache = ~/cache/pip
 [testenv:pep8]
 sitepackages = False
 commands =
-  flake8
+  flake8 {posargs}
   flake8 --filename=nova* bin
 
 [testenv:pylint]