it would be nice to upgrade our operating system from something 4+ years old. now that we have an image to test with (from bug 1281179), we can start greening up tests. Here is a try run with linux64 opt/debug jobs running fully in linux16.04: https://treeherder.mozilla.org/#/jobs?repo=try&revision=72f692508a3c78e5fd6341880e603b8502cc880c&selectedJob=24704304 a lot of failures occur, I suspect a few key fixes and some manifest cleanup and we could be live. web-platform-tests: I suspect we just need to update the manifests to have the expected status for ubuntu 12.04 be applied to ubuntu 16.04, for example: https://dxr.mozilla.org/mozilla-central/source/testing/web-platform/meta/2dcontext/path-objects/2d.path.stroke.prune.arc.html.ini#5 reftest: A lot of failures, most of these do not look like known failures, I expect we need to adjust default fonts, anti-aliasing, or something with screen resolution or pixels. mochitest-chrome: 3 tests fail, I assume these have to do with where pixels are on the screen- either way we can fix these with a little bit of time mochitest-browser-chrome: looks like 2 tests are perma fail here mochitest-plain: looks like 2 tests are perma fail here as well mochitest-devtools: 1 issue on opt, possibly more on debug marionette: 1 issue on both opt/debug, maybe a second issue on debug finally - jittest, mochitest-gl- these appear to have issues

I believe we can move over: mochitest-clipboard mochitest-chrome-style xpcshell mochitest-style sadly not: reftest-stylo (28 tests fail right now) mochitest-devtools (3+ tests, sort of sloppy with leaks or other automation woes) mochitest-chrome (1 test....) mochitest-plain (3 tests, but a mess on asan with automation errors) mochitest-browser-chrome (2 consistent failures, a big mess as well) here is a try push for reference: https://treeherder.mozilla.org/#/jobs?repo=try&revision=2e80f5f264456a5f944b17f5c1b1119882bbc10d&filter-searchStr=browser-chrome&selectedJob=86342821 assuming we move the 4 over, I would like to switch tests.yml to default to 1604 and have to specify using 1204

here is the list of failures that are perma fail in the try push: editor/libeditor/tests/test_dragdrop.html (opt 8) layout/forms/test/test_bug348236.html (opt 8) dom/events/test/test_bug946632.html (debug 3) devtools/client/inspector/rules/test/browser_rules_edit-display-grid-property.js (x64 debug dt10) toolkit/content/tests/widgets/test_popupanchor.xul (x64 debug c3)

the above failures are based on the try runs for the mochitest-plain, mochitest-devtools, and mochitest-chrome bugs 1319782, 1319804, 1319807 respectively.

editor/libeditor/tests/test_dragdrop.html (opt 8) - bug 1335880 devtools/client/inspector/rules/test/browser_rules_edit-display-grid-property.js (x64 debug dt10) - bug 1356214 toolkit/content/tests/widgets/test_popupanchor.xul (x64 debug c3) - bug 1335894 Can you get bugs on file for: layout/forms/test/test_bug348236.html (opt 8) dom/events/test/test_bug946632.html (debug 3)

layout/forms/test/test_bug348236.html (opt 8) - bug 1360559 dom/events/test/test_bug946632.html (debug 3) - bug 1360568

all done