diff --git a/tox.ini b/tox.ini
index 13bca3c..0e59285 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py34
+envlist = py27,py34,py35,py36
 
 [testenv]
 commands = python -m unittest discover