diff --git a/tox.ini b/tox.ini
index 4e9ea0b5..65d460a0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,6 +8,9 @@ setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
 
+[testenv:venv]
+commands = {posargs}
+
 [testenv:doc8]
 commands =
   doc8 -e .rst doc/source