diff --git a/.travis.yml b/.travis.yml
index 3ed893d2..1aed2124 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,8 @@ language: python
 python:
   - 3.4
 before_install:
-  - brew update
-  - brew install python3
+  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then; then; brew update; fi
+  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then; then; brew install python3; fi
 install:
   - pip install tox
 script: