diff --git a/.travis.yml b/.travis.yml
index 8e90dd1c5d..ec928fecff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,8 @@
 # Travis CI script. See https://travis-ci.org/ for more info.
 
+os:
+    - linux
+    - osx
 language: rust
 rust:
     # The oldest version we currently support. See