1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 99aeb67d2..d4a1b24ac 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist =
     lint,
-    py35,py36,py37,py38,pypy3,
+    py35,py36,py37,py38,py39,pypy3,
     py38-cover,coverage,
     docs