I have seen the API test _WKDownload.CancelDownload fail on iOS and macOS intermittently. I can not say for sure as there is no flakiness dashboard for API tests but I have seen it fail more on iOS. This was previously flaky but was deemed resolved in bug linked in "see also". Current build: https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20WK2%20(Tests)/builds/2903 https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20WK2%20(Tests)/builds/2903/steps/run-api-tests/logs/stdio The failure: FAIL _WKDownload.CancelDownload /Volumes/Data/slave/elcapitan-debug/build/Tools/TestWebKitAPI/Tests/WebKitCocoa/Download.mm:204 Value of: false Actual: false Expected: true
This is definitely not flakey right now.