diff --git a/tox.ini b/tox.ini
index 80e6df06..9b98a63b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps =
     nose
     pytest
     vcrpy
-commands = py.test
+commands = py.test {posargs}
 
 [testenv:coverage]
 basepython = python2