diff --git a/tox.ini b/tox.ini
index a519cb1e..144f51af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = flake8,py27,py34,py35,py36,py37,pre-commit,pypy,mypy
+envlist = flake8,py27,py34,py35,py36,py37,py38,py39,pre-commit,pypy,mypy
 skipsdist = true
 
 [testenv]
@@ -12,6 +12,7 @@ commands =
     py{27,py}: py.test --cov=graphene graphene examples {posargs}
     py{35}: py.test --cov=graphene graphene examples tests_asyncio {posargs}
     py{36,37}: py.test --cov=graphene graphene examples tests_asyncio tests_py36 {posargs}
+    py{38,39}: py.test --cov=graphene graphene examples tests_asyncio tests_py36 {posargs}
 
 [testenv:pre-commit]
 basepython=python3.7