diff --git a/.travis.yml b/.travis.yml
index ee3b963..2688fae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,10 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
-sudo: false
+
+branches:
+  only:
+    - master
 
 env:
   - MODE=pytest