diff --git a/.travis.yml b/.travis.yml
index 4e6d418f80..36f2784903 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,9 @@ install:
   - cd $OLDPWD
 mono:
   - 4.0.5
+os:
+  - linux
+  - osx
 osx_image: xcode7.1
 script:
   - ./build.sh --quiet verify