311759 2026-04-08 14:44:53 -0700 [macOS release] imported/w3c/web-platform-tests/event-timing/keydown is a flaky text failure. 2026-04-09 14:54:30 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 d_delatoba d_delatoba a_protyasha lily_spiniolas rreno webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2198097 0 d_delatoba 2026-04-08 14:44:53 -0700 imported/w3c/web-platform-tests/event-timing/keydown is a flaky text failure on macOS release arm64. HISTORY: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fevent-timing%2Fkeydown.html&architecture=x86_64 DIFF: --- /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/event-timing/keydown-expected.txt +++ /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/event-timing/keydown-actual.txt @@ -1,4 +1,6 @@ -PASS Event Timing Keydown. +Harness Error (TIMEOUT), message = null +TIMEOUT Event Timing Keydown. Test timed out + DIFF URL: https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/310789@main%20(3116)/imported/w3c/web-platform-tests/event-timing/keydown-pretty-diff.html REPRODUCTION: I was able to reproduce this failure on macOS 26.4 with the following: run-webkit-tests --no-build --no-retry --no-show-results --exit-after-n-failures=1 --expect-pass --iterations=285 --force -f --release imported/w3c/web-platform-tests/event-timing/keydown.html I am going to mark expectations as pass fail while this pends investigation. 2198098 1 webkit-bug-importer 2026-04-08 14:44:59 -0700 <rdar://problem/174354241> 2198101 2 d_delatoba 2026-04-08 14:49:02 -0700 Test gardening pull request: https://github.com/WebKit/WebKit/pull/62300 2198104 3 ews-feeder 2026-04-08 14:51:02 -0700 Test gardening commit 310797@main (c5a2511f7684): <https://commits.webkit.org/310797@main> Reviewed commits have been landed. Closing PR #62300 and removing active labels. 2198213 4 d_delatoba 2026-04-08 18:11:06 -0700 Pull request: https://github.com/WebKit/WebKit/pull/62323 2198523 5 d_delatoba 2026-04-09 14:54:30 -0700 Appears to be a timing issue in the test particularly with how it handles performance.now() and event timing 8 millisecond granularity.