diff --git a/tox.ini b/tox.ini
index bfeabf24..790d0af0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,17 +15,21 @@ commands =
          stestr run {posargs}
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:docs]
+basepython = python3
 commands =
    python setup.py build_sphinx {posargs}
 
 [testenv:pep8]
+basepython = python3
 commands =
    flake8 {toxinidir}/openstack_health {posargs}
 
 [testenv:cover]
+basepython = python3
 setenv =
    {[testenv]setenv}
    PYTHON = coverage run --source openstack_health --parallel-mode
@@ -45,7 +49,9 @@ show-source = True
 exclude = .git,.venv,.tox,dist,doc,openstack,*egg
 
 [testenv:npm-test]
+basepython = python3
 commands = npm test
 
 [testenv:npm-lint]
+basepython = python3
 commands = npm run lint --silent