On 1th of June I ran flakyhunter tool to detect flaky tests on the tree not gardened during May. This is what got analyzed GTK: Analyzing test results for the last 200 runs of the bot gtk-release... Got 7192 test results for 200 runs in the range [263752@main-264794@main] WPE: Analyzing test results for the last 200 runs of the bot wpe-release... Got 7204 test results for 200 runs in the range [264116@main-264802@main
I uploaded the raw output from the flakyhunter here: https://people.igalia.com/clopez/wkbug/257624/ I processed that and added the new flakies for both GTK and WPE on https://commits.webkit.org/264809@main If you have doubts about why a test was added there then grep the name of the test on that files uploaded above and it will give you hints.
fast/mediastream/RTCSessionDescription.html is not crashing anymore since 264659@main, probably fixed by 264664@main. I'll remove it from TestExpectations.