diff --git a/tox.ini b/tox.ini
index 1a15c74..cb1e90e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py27,py37,pep8,pylint,docs
+envlist = py27,py36,py37,pep8,pylint,docs
 skipsdist = True
 
 [testenv]