diff --git a/.travis.yml b/.travis.yml
index 61c0150..c861839 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,6 +23,7 @@ before_install:
 - pip install --upgrade --user git+git://github.com/eddyxu/cpp-coveralls.git
 
 install:
+- ls /usr/bin
 - sudo ln -sf /usr/bin/gcov /usr/bin/gcov
 script: