is a flakey text failure in macOS BigSur Wk2.
-PASS Refresh rendering when starting to play a video
+FAIL Refresh rendering when starting to play a video assert_true: refreshing video rendering: 1 expected true got false
Test only fails on Debug, has been happening for a while, and is extremely flakey. That being said, I was able to reproduce the failure at BigSur Debug ToT using the following test:
run-webkit-test compositing/video/video-update-rendering.html --debug --iterations 100 -f
Updated test expectations to Pass Failure here: