diff --git a/python/tox.ini b/python/tox.ini
index 1cdcab6441..d73d27afba 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -10,7 +10,6 @@ setenv =
 commands =
     python setup.py -q --cpp_implementation develop
     python setup.py build_py
-    python setup.py -q test -q
-    python setup.py -q test -q --cpp_implementation
+    python setup.py -q test -q {posargs}
 deps =
     six