diff --git a/.travis.yml b/.travis.yml
index 12ea7bc..dfdc8fb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,13 +2,26 @@ language: python
 before_install:
   - curl -O https://johnvansickle.com/ffmpeg/releases/ffmpeg-3.3.1-64bit-static.tar.xz
   - tar Jxf ffmpeg-3.3.1-64bit-static.tar.xz
-env:
-  - TOX_ENV=py27
-  - TOX_ENV=py33
-  - TOX_ENV=py34
-  - TOX_ENV=py35
-  - TOX_ENV=py36
-  - TOX_ENV=pypy
+matrix:
+  include:
+    - python: 2.7
+      env:
+      - TOXENV=py27
+    - python: 3.3
+      env:
+      - TOXENV=py33
+    - python: 3.4
+      env:
+      - TOXENV=py34
+    - python: 3.5
+      env:
+      - TOXENV=py35
+    - python: 3.6
+      env:
+      - TOXENV=py36
+    - python: pypy
+      env:
+      - TOXENV=pypy
 install:
   - pip install tox
 script: