diff --git a/tox.ini b/tox.ini
index a390378..78539a8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,3 +17,6 @@ deps =
 changedir={toxinidir}/tests
 commands =
     py.test -vv {posargs}
+
+[testenv:venv]
+commands = {posargs}