diff --git a/tox.ini b/tox.ini
index b9cb81fb..a5ececbd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,15 +22,19 @@ basepython = python3
 commands = flake8
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands = python setup.py testr --coverage --testr-args='{posargs}'
 
 [testenv:docs]
+basepython = python3
 commands = python setup.py build_sphinx
 
 [testenv:bashate]
+basepython = python3
 commands =
   bash -c "ls devstack/*.sh | xargs bashate -v {posargs}"
 whitelist_externals = bash