diff --git a/.travis.yml b/.travis.yml
index cec6b84c8..a95cfe66d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,22 @@
 matrix:
   include:
+    - os: osx
+      osx_image: xcode9.3  # macOS 10.13
+      env:
+        - MATRIX_EVAL=""
+    - os: osx
+      osx_image: xcode8.3  # macOS 10.12
+      env:
+        - MATRIX_EVAL=""
+    - os: osx
+      osx_image: xcode8  # macOS 10.11
+      env:
+        - MATRIX_EVAL=""
     - os: linux
       dist: trusty # Ubuntu 14.04
       sudo: false
       language: python
-      python: '2.6'
+      python: '3.6'
       env:
         - MATRIX_EVAL=""
     - os: linux
@@ -14,6 +26,13 @@ matrix:
       python: '2.7'
       env:
         - MATRIX_EVAL=""
+    - os: linux
+      dist: trusty # Ubuntu 14.04
+      sudo: false
+      language: python
+      python: '2.6'
+      env:
+        - MATRIX_EVAL=""
     - os: linux
       dist: trusty # Ubuntu 14.04
       sudo: false
@@ -35,25 +54,6 @@ matrix:
       python: '3.5'
       env:
         - MATRIX_EVAL=""
-    - os: linux
-      dist: trusty # Ubuntu 14.04
-      sudo: false
-      language: python
-      python: '3.6'
-      env:
-        - MATRIX_EVAL=""
-    - os: osx
-      osx_image: xcode9.3  # macOS 10.13
-      env:
-        - MATRIX_EVAL=""
-    - os: osx
-      osx_image: xcode8.3  # macOS 10.12
-      env:
-        - MATRIX_EVAL=""
-    - os: osx
-      osx_image: xcode8  # macOS 10.11
-      env:
-        - MATRIX_EVAL=""
 
 before_install:
   - env