diff --git a/tox.ini b/tox.ini
index 0160c41..43383ed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,4 +5,4 @@ envlist = py27,py36
 deps =
         pytest
         requests
-commands = pytest --tb=short
+commands = pytest --tb=short {posargs}