diff --git a/tox.ini b/tox.ini
index c9254658..c6843aef 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,33 +17,41 @@ whitelist_externals = bash
                       find
 
 [testenv:pep8]
+basepython = python3
 commands =
     flake8 {posargs}
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands = python setup.py test --coverage \
            --coverage-package-name=muranoagent --testr-args='{posargs}'
            coverage report --omit '*/tests/*'
 
 [testenv:debug]
+basepython = python3
 commands =
   find . -type f -name "*.pyc" -delete
   oslo_debug_helper -t muranoagent/tests {posargs}
 
 [testenv:docs]
+basepython = python3
 commands = python setup.py build_sphinx
 
 [testenv:pyflakes]
+basepython = python3
 deps = flake8
 commands = flake8
 
 [testenv:genconfig]
+basepython = python3
 commands = oslo-config-generator --config-file etc/oslo-config-generator/muranoagent.conf
 
 [testenv:releasenotes]
+basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [flake8]