diff --git a/tox.ini b/tox.ini
index b115a939..780a6091 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py34
+envlist = py34,py35
 skipsdist = True
 
 [testenv]