The wdspec tests in contexts.py already fail silently on linux64 debug. The new actions tests also fail to start a webdriver session, although only intermittenly. When running the job on a one-click loaner, I can't tell if it's a browser crash with no crash dump or a run-time error in wptrunner. Perhaps there's a race wherein it takes longer to start a Marionette session and wptrunner starts tests before Marionette is ready, all the tests fail and the browser gets killed. MozReview-Commit-ID: FoRbSZOhBUA
Common testing tools for mozilla codebase projects, test suite definitions for automated test runs, tests that don't fit anywhere else, and other fun stuff