diff --git a/.travis.yml b/.travis.yml
index 9d5678f9a..08da1e02c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,10 @@ python:
 #  - "pypy"
 #  - "pypy3"
 
+os:
+  - linux
+  - osx
+
 dist: trusty
 
 sudo: required