The demo code is effectively functional tests, and shouldn't appear on the coverage report / badge:
https://coveralls.io/r/GoogleCloudPlatform/gcloud-python?branch=master
PR #226 attempted to force-ignore those modules, but they got picked up anyway:
https://coveralls.io/builds/1305677
Perhaps we need to review http://nedbatchelder.com/code/coverage/excluding.html and look for more ways to exclude those modules.