diff --git a/tox.ini b/tox.ini
index 8d1e364b..33507345 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.18.0
-envlist = py39,pep8
+envlist = py3,pep8
 ignore_basepython_conflict = true
 
 [testenv]
@@ -8,6 +8,7 @@ basepython = python3
 usedevelop = True
 setenv =
    VIRTUAL_ENV={envdir}
+   DJANGO_SETTINGS_MODULE=manila_ui.tests.settings
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
@@ -16,17 +17,7 @@ allowlist_externals =
 commands =
   /bin/bash run_tests.sh -N --no-pep8 {posargs}
 
-[testenv:py36]
-setenv = DJANGO_SETTINGS_MODULE=manila_ui.tests.settings
-
-[testenv:py37]
-setenv = DJANGO_SETTINGS_MODULE=manila_ui.tests.settings
-
-[testenv:py38]
-setenv = DJANGO_SETTINGS_MODULE=manila_ui.tests.settings
-
 [testenv:py3-dev]
-setenv = DJANGO_SETTINGS_MODULE=manila_ui.tests.settings
 commands =
   pip install {env:HORIZON_REPO:git+https://opendev.org/openstack/horizon}
   {[testenv]commands}