diff --git a/tox.ini b/tox.ini
index 7b24a9c0..facb7cea 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py35,py27,pep8,docs
+envlist = py37,py36,py35,py27,pep8,docs
 
 [testenv]
 install_command = pip install {opts} {packages}