diff --git a/tox.ini b/tox.ini
index 0d29f2b9..cc91c2ef 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,9 @@ deps=
   -rrequirements-lock.txt
   -rrequirements-test.txt
 
+[testenv:venv]
+commands = {posargs}
+
 [testenv:freeze]
 basepython=python3
 whitelist_externals=