After pulling the latest from mozilla-central today, when trying to run a browser mochitest via |mach test|, e.g., |./mach test browser/components/extensions/test/browser/browser_ext_sessions.js|, I am told that no tests are found to run. The message is "ERROR no tests to run using specified combination of filters: skip_if, run_if, fail_if, remove_imptest_failure_expectations, subsuite(name=)". I have tried this against a debug build and an optimized build (both artifact builds) on OS X 10.11.6. Is this a regression, or do I need a different config or command as of today in order to run browser mochitests?

In case this was somehow just an issue with artifact builds, I tested as well with a full build. I just did a full, debug build with the latest code from m-c and I am still seeing this issue. Unless this is somehow just affecting me, this seems like a pretty big deal.