diff --git a/tox.ini b/tox.ini
index 5520dd83d0b454bf143fad0670ca288b9aa70125..59dd39670d58d2322e31858f054e01f61c8c8408 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,9 @@ deps = -r{toxinidir}/requirements.txt
 commands =
     flake8
 
+[testenv:venv]
+commands = {posargs}
+
 [testenv:docs]
 commands = python setup.py build_sphinx