diff --git a/tox.ini b/tox.ini
index aef13f9..632bb6c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,12 +18,15 @@ deps = -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/re
 commands = python manage.py test {posargs} --settings=blazar_dashboard.test.settings
 
 [testenv:pep8]
+basepython = python3
 commands = flake8 {posargs}
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands =
   coverage erase
   coverage run {toxinidir}/manage.py test blazar_dashboard --settings=blazar_dashboard.test.settings {posargs} --exclude-dir=blazar_dashboard/test/integration_tests {posargs}
@@ -37,6 +40,7 @@ commands =
   python manage.py test {posargs} --settings=blazar_dashboard.test.settings
 
 [testenv:eslint]
+basepython = python3
 whitelist_externals = npm
 commands =
   npm install
@@ -44,12 +48,14 @@ commands =
   npm run lint
 
 [testenv:docs]
+basepython = python3
 deps =
      -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
      -r{toxinidir}/doc/requirements.txt
 commands = python setup.py build_sphinx
 
 [testenv:releasenotes]
+basepython = python3
 deps =
      -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
      -r{toxinidir}/doc/requirements.txt