diff --git a/tox.ini b/tox.ini
index 03c778d..45908db 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,18 +20,23 @@ whitelist_externals = find
 setenv = DJANGO_SETTINGS_MODULE=mistraldashboard.test.settings
 
 [testenv:pep8]
+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:debug]
+basepython = python3
 whitelist_externals = oslo_debug_helper
 commands = oslo_debug_helper -t mistraldashboard/test {posargs}
 
@@ -40,6 +45,7 @@ show-source = True
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,.ropeproject,tools,horizon
 
 [testenv:releasenotes]
+basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:py35dj20]