In looking into failures in external/wpt/css/vendor-imports/mozilla/ I discovered that the following tests are marked as FAIL in TestExpectations but the flakiness dashboards suggests most of them are currently passing. The bug number associated with them in TestExpectations appears to be incorrect.

TestExpectations:
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-break-inside-001a.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-001.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-002.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-003.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-004.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-005.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-005a.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-006.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-006a.html [ Failure ]
 crbug.com/553838  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-007.html [ Failure ]

Flakiness dashboard currently mostly showing green:

external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-001.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-002.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-003.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-004.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-005.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-005a.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-006a.html
external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/writing-modes-3/text-combine-upright-compression-007.html

Flakiness dashboard link:

https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_tests&tests=external%2Fwpt%2Fcss%2Fvendor-imports%2Fmozilla%2Fmozilla-central-reftests%2Fwriting-modes-3