1093874 2nd attempt

New pull request created for Bug 1093874, reverting dummy filechange commit
I guess you can factorize these tests by using `parameterized` from the package ` marionette.marionette_test`. I've used it pretty recently, you can [have a look there](https://github.com/mozilla-b2g/gaia/pull/25843/files#diff-2aff056a7c99b9f853d588feae7a015dR12).