diff --git a/tox.ini b/tox.ini
index 90fd89c..7dc7e0a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,14 +21,17 @@ commands = {[unit_tests]commands}
 commands = python manage.py test {posargs} --settings=neutron_vpnaas_dashboard.test.settings
 
 [testenv:pep8]
+basepython = python3
 commands =
   flake8 {posargs}
   {envpython} {toxinidir}/manage.py extract_messages --module neutron_vpnaas_dashboard --verbosity 0 --check-only
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands =
   coverage erase
   coverage run {toxinidir}/manage.py test neutron_vpnaas_dashboard --settings=neutron_vpnaas_dashboard.test.settings {posargs}
@@ -42,12 +45,14 @@ commands =
   {[unit_tests]commands}
 
 [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 = sphinx-build -W -b html doc/source doc/build/html
 
 [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