diff --git a/.travis.yml b/.travis.yml
index bd5cc22..f88a72d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: node_js
 addons:
   firefox: latest
+os:
+  - linux
+  - osx
 matrix:
   - include:
     - os: linux