diff --git a/.travis.yml b/.travis.yml
index 9d1828f0..417823ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: c
 before_install:
   - pushd ..
+  - ls -la
   - sh -c 'if [ ! -d arduino-1.6.7 ]; then wget -v http://downloads.arduino.cc/arduino-1.6.7-linux64.tar.xz && tar xvf arduino-1.6.7-linux64.tar.xz; fi'
   - popd
 install: