#1186 - Making sudo required seems to resolve the issue.

.travis.yml

@@ -4,7 +4,6 @@ env:
 - DISTRO=ubuntu-trusty
 
 before_script:
-    - sudo ls -ld /sys
     - curl -L "https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/shunit2/shunit2-2.1.6.tgz" | tar zx
 
 addons: