diff --git a/.travis.yml b/.travis.yml
index 3f3dc6894..b57ed996a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ matrix:
     - os: osx
       osx_image: xcode8.3
       env: TOOLSET=clang TEST_ALL_EXTRAS=
+      python: "2.6"
 language: python
 script:
   - ./bootstrap.sh --with-toolset=${TOOLSET}