diff --git a/tox.ini b/tox.ini
index 76225db..bf5980b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py33,py34,py35,py36
+envlist = py27,py34,py35,py36
 skip_missing_interpreters=True
 
 [testenv]