diff --git a/tox.ini b/tox.ini
index 1dfb82f..b06031b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,8 @@ envlist =
     py27,
     py32,
     py33,
-    py34
+    py34,
+    py35
 # ignore missing setup.py
 skipsdist = True