1 files changed, 3 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index b4758d1d..3282de14 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,13 +15,15 @@
 # https://tox.readthedocs.io/
 
 [tox]
-envlist = py36, py37, py38
+envlist = py35, py36, py37, py38, py39
 
 [gh-actions]
 python =
+    3.5: py35
     3.6: py36
     3.7: py37
     3.8: py38
+    3.9: py39
 
 [testenv]
 deps = pytest