diff --git a/tox.ini b/tox.ini
index b7018a7..38cb81f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,6 +36,7 @@ deps = -r{toxinidir}/test-requirements.txt
 commands = flake8 {posargs} hooks
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [flake8]