Testing environments with Travis

.travis.yml

@@ -3,18 +3,19 @@ language: python
 matrix:
   include:
     - os: linux
-      dist: trusty
       sudo: required
       python: 3.2
-  include:
     - os: linux
-      dist: trusty
       sudo: required
       python: 2.7 
-  include:
     - os: osx
       osx_image: xcode7.2
       sudo: required
+      python: 2.7
+    - os: osx
+      osx_image: xcode7.2
+      sudo: required
+      python: 3.2
 
 before_install:
   - sudo apt-get update