fast/block/float/float-with-anonymous-previous-sibling.html [ ImageOnlyFailure ] https://build.webkit.org/results/WPE%20Linux%2064-bit%20Release%20(Tests)/r263067%20(18618)/fast/block/float/float-with-anonymous-previous-sibling-diffs.html The differences between expected and actual images is minimal (just 1 pixel). It seems the test has been flaky since long time ago.