diff --git a/.travis.yml b/.travis.yml
index 8f49600..53678e8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,7 @@ install:
 
 script:
   - bash files/run_on_master.sh
+  - git checkout $TRAVIS_COMMIT
   - bash files/check.sh
 
 notifications: