diff --git a/.travis.yml b/.travis.yml
index c220de9fd..7014b4b37 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,10 @@ node_js:
   - 5
   - 6
 
+os:
+  - linux
+  - osx
+
 install:
   - npm -g install npm@3
   - npm install