diff --git a/tox.ini b/tox.ini
index 1ac0bff79..793f0e7c8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -28,10 +28,12 @@ commands=
 basepython = python3
 description =
     Run style checks.
+whitelist_externals =
+    flake8
 extras =
     lint
 commands =
-    flake8
+    flake8 {posargs}
 
 [testenv:pylint]
 basepython = python3