diff --git a/.travis.yml b/.travis.yml
index 3230e843f..15be440e8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,8 +6,16 @@ matrix:
   include:
     - os: linux
       dist: trusty
+      python: "2.7"
+    - os: linux
+      dist: trusty
+      python: "3.5"
     - os: osx
       osx_image: xcode7
+      python: "2.7"
+    - os: osx
+      osx_image: xcode7
+      python: "3.5"
 
 install:
   - make