diff --git a/.travis.yml b/.travis.yml
index 1b94ac7..da961e2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,17 @@
 language: c
 
-os:
-    - linux
-    - osx
-
 sudo: required
-dist: trusty
+
+matrix:
+    include:
+        - os: linux
+          dist: trusty
+        - os: osx
+          osx_image: xcode7.3
+        - os: osx
+          osx_image: xcode7.1
+        - os: osx
+          osx_image: beta-xcode6.2
 
 before_install:
     - if [ `uname` = "Linux" ]; then