diff --git a/tox.ini b/tox.ini
index 3d83898..f00c7fb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35
+envlist = py27,py34,py35
 
 [testenv]
 deps=