diff --git a/.travis.yml b/.travis.yml
index 08d3f9898c6541c980028d32e7a64d6d50a35088..083969ce9a5d027bcaa4c4cc5a759fa5875eab3c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,10 +4,11 @@ branches:
 only:
   - master
 
-env:
-  - PYTHON_VERSION = "3.4"
-  - PYTHON_VERSION = "3.5"
-  - PYTHON_VERSION = "3.6"
+matrix:
+  include:
+    - PYTHON_VERSION = "3.4"
+    - PYTHON_VERSION = "3.5"
+    - PYTHON_VERSION = "3.6"
 os:
   - linux
   - osx