diff --git a/tox.ini b/tox.ini
index 73fdb3f5..0c476640 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = pep8,py35,py27,py27dj18
+envlist = pep8,py35,py27,py35dj20
 minversion = 2.3.2
 skipsdist = True
 
@@ -29,12 +29,16 @@ commands =
   coverage xml --omit '.tox/cover/*' -o 'cover/coverage.xml'
   coverage html --omit '.tox/cover/*' -d 'cover/htmlcov'
 
-# Django-1.8 is LTS
-[testenv:py27dj18]
-basepython = python2.7
+[testenv:py35dj20]
+basepython = python3.5
+whitelist_externals = git
 commands =
-    pip install django>=1.8,<1.9
-    python manage.py test {posargs} --settings=magnum_ui.test.settings
+  # NOTE(shu-mutow): To test this new env, need to re-install recent horizon
+  # from git master branch like CI infra does.
+  git clone https://git.openstack.org/openstack/horizon.git .tox/py35dj20/src/horizon
+  pip install -U -t .tox/py35dj20/lib/python3.5/site-packages/ .tox/py35dj20/src/horizon
+  pip install django>=2.0,<2.1
+  python manage.py test {posargs} --settings=magnum_ui.test.settings
 
 [testenv:eslint]
 whitelist_externals = npm