Volkswagen detects when your tests are being run in a CI server, makes them pass
github.com
github.com
https://events.ccc.de/congress/2015/Fahrplan/events/7331.htm... https://www.youtube.com/watch?v=MLZLxzYCarw
This acoustic deactivation trick was given to several car makers, which do make heavy us of it. VW is not even on the top of the list of the affected engines. But VW has the most money and marketshare, so they went after the them.
Didn't check the update from this year CCC talk yet.
See also: https://www.transportenvironment.org/sites/te/files/2016_09_...