diff --git a/.travis.yml b/.travis.yml
index 74d589a6008..83cc26d0b7d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ cache:
   directories:
         - $HOME/gcloud/
 env:
-        - PATH=$PATH:$HOME/gcloud/google-cloud-sdk/bin GOOGLE_APPLICATION_CREDENTIALS=$TRAVIS_BUILD_DIR/python-docs-samples.json PYTHONPATH=${HOME}/gcloud/google-cloud-sdk/platform/google_appengine #Other environment variables on same line
+        - PATH=$PATH:$HOME/gcloud/google-cloud-sdk/bin GOOGLE_APPLICATION_CREDENTIALS=$TRAVIS_BUILD_DIR/python-docs-samples.json PYTHONPATH=$HOME/gcloud/google-cloud-sdk/platform/google_appengine #Other environment variables on same line
 
 before_install:
         #ENCRYPT YOUR PRIVATE KEY (If you need authentication)
@@ -33,9 +33,11 @@ before_install:
         - if [ -a python-docs-samples.json ]; then
                 gcloud auth activate-service-account --key-file python-docs-samples.json;
           fi
+        - ls $HOME/gcloud/google-cloud-sdk/platform/google_appengine  # debugging travis env
 
 install:
         - pip install tox
+        - tox --version
 
 script:
         - tox