diff --git a/tox.ini b/tox.ini
index c9b2db800d..27b598ab9d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -60,7 +60,7 @@ commands =
 usedevelop = True
 commands =
   {envpython} {toxinidir}/manage.py extract_messages --verbosity 0 --check-only
-  flake8
+  flake8 {posargs}
 
 [testenv:cover]
 commands =