diff --git a/tox.ini b/tox.ini
index ef9ef71..9d434dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -66,4 +66,5 @@ commands =
                      {toxinidir}/tests/test.yml
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}