diff --git a/tox.ini b/tox.ini
index dd1dcb2a..89d2b5fd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,5 +5,5 @@ envlist=py26,py27,py31,py32,py33
 deps=Cython
 commands=
     {envpython} setup.py --quiet build install
-    {envpython} -m lupa.tests.test
+    {envpython} lupa/tests/test.py
 sitepackages=False