diff --git a/tox.ini b/tox.ini
index ae761121..6bf8bb53 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,6 +2,8 @@
 envlist =
     py26,
     py27,
+    py35,
+    py36,
 
 [testenv]
 deps =