diff --git a/tox.ini b/tox.ini
index cca09d0..a09822f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,16 +21,20 @@
     stestr --test-path ./patrole_tempest_plugin/tests/unit run {posargs}
 
 [testenv:pep8]
+basepython = python3
 commands = flake8 {posargs}
            check-uuid --package patrole_tempest_plugin.tests.api
 
 [testenv:uuidgen]
+basepython = python3
 commands = check-uuid --package patrole_tempest_plugin.tests.api --fix
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:cover]
+basepython = python3
 commands = rm -rf *.pyc
            rm -rf cover
            rm -f .coverage
@@ -46,6 +50,7 @@
                       rm
 
 [testenv:docs]
+basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/requirements.txt
@@ -56,6 +61,7 @@
 whitelist_externals = rm
 
 [testenv:releasenotes]
+basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/requirements.txt
@@ -66,9 +72,11 @@
 whitelist_externals = rm
 
 [testenv:debug]
+basepython = python3
 commands = oslo_debug_helper -t patrole_tempest_plugin/tests {posargs}
 
 [testenv:genconfig]
+basepython = python3
 commands = oslo-config-generator --config-file etc/config-generator.patrole.conf
 
 [flake8]