The following layout test is flaky on mac-wk2 imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event.https.html Probable cause: Unknown. Flakiness Dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fservice-workers%2Fservice-worker%2Ffetch-event.https.html Diff from most recent failure: --- /Volumes/Data/slave/highsierra-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event.https-expected.txt +++ /Volumes/Data/slave/highsierra-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/service-workers/service-worker/fetch-event.https-actual.txt @@ -7,7 +7,7 @@ PASS Service Worker responds to fetch event with an existing client id PASS Service Worker does not respond to fetch event PASS Service Worker responds to fetch event with null response body -PASS Service Worker fetches other file in fetch event +FAIL Service Worker fetches other file in fetch event assert_unreached: unexpected rejection: wait_for_state must be passed a ServiceWorker Reached unreachable code PASS Service Worker responds to fetch event with POST form PASS Multiple calls of respondWith must throw InvalidStateErrors PASS Service Worker event.respondWith must set the used flag