diff --git a/tox.ini b/tox.ini
index cd148849..d1bd5b21 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,21 +13,27 @@ deps = -r{toxinidir}/requirements.txt
 commands = python setup.py testr --slowest --testr-args='{posargs} tests.unit'
 
 [testenv:functional]
+basepython = python3
 commands = python setup.py testr --slowest --testr-args='{posargs} tests.functional'
 
 [testenv:queries]
+basepython = python3
 commands = python setup.py testr --slowest --testr-args='{posargs} tests.functional.test_queries'
 
 [testenv:pep8]
+basepython = python3
 commands = flake8
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands = python setup.py test --coverage --coverage-package-name='elastic_recheck' --testr-args='{posargs} tests.unit'
 
 [testenv:run]
+basepython = python3
 # test to run the bot as a non voting foreground process
 commands = elastic-recheck -f -n --noirc elasticRecheck.conf
 
@@ -40,10 +46,12 @@ ignore = E123,E125,H233
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build
 
 [testenv:docs]
+basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -b html -W doc/source doc/build/html
 
 [testenv:bindep]
+basepython = python3
 # Do not install any requirements. We want this to be fast and work even if
 # system dependencies are missing, since it's used to tell you what system
 # dependencies are missing! This also means that bindep must be installed