Created attachment 392146 [details] accelerated-animation-renderer-change-diff webanimations/accelerated-animation-renderer-change.html Description: This test is flaky failing on Mac. The diffs appear to vary and the flaky failures are visible throughout the available history. History: https://results.webkit.org/?suite=layout-tests&test=webanimations%2Faccelerated-animation-renderer-change.html&limit=50000&platform=mac Diff: https://build.webkit.org/results/Apple-Catalina-Debug-WK1-Tests/r257654%20(2783)/webanimations/accelerated-animation-renderer-change-diff.png
<rdar://problem/59953656>
I have marked this test as failing on images while this issue is investigated. https://trac.webkit.org/changeset/257717/webkit
I can reproduce this issue with r257710 by running the command below. run-webkit-tests --iterations 2000 --exit-after-n-failures 1 --no-retry --force -f --debug -1 webanimations/accelerated-animation-renderer-change.html [372/2000] webanimations/accelerated-animation-renderer-change.html failed unexpectedly (reference mismatch) Exiting early after 1 failures. 369 tests run. 368 tests ran as expected, 1 didn't (1631 didn't run):