diff --git a/tox.ini b/tox.ini
index 53c14551..20537801 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,9 @@ setenv=
   PYTHONWARNING=all
 passenv=HTTP_PROXY HTTPS_PROXY http_proxy https_proxy NO_PROXY no_proxy
 
+[testenv:venv]
+commands = {posargs}
+
 # Please use `make docs` instead
 [testenv:docs]
 basepython=python3