diff --git a/tox.ini b/tox.ini
index eb73406..2ddfd7a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,18 +13,22 @@ deps = -r{toxinidir}/requirements.txt
 commands = python setup.py test --slowest --testr-args='{posargs}'
 
 [testenv:pep8]
+basepython = python3
 commands = flake8
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands =
   coverage erase
   python setup.py test --coverage --coverage-package-name=grafana_dashboards --testr-args='{posargs}'
   coverage report
 
 [testenv:docs]
+basepython = python3
 commands = python setup.py build_sphinx
 
 [flake8]