The following layout test is flaky on Windows. fast/repaint/obscured-background-no-repaint.html Probable cause: --- /home/buildbot/slave/win-release-tests/build/layout-test-results/fast/repaint/obscured-background-no-repaint-expected.txt +++ /home/buildbot/slave/win-release-tests/build/layout-test-results/fast/repaint/obscured-background-no-repaint-actual.txt @@ -3,7 +3,21 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". -PASS repaintRects is "" +FAIL repaintRects should be . Was (repaint rects + (rect 50 226 16 16) + (rect 50 558 16 16) + (rect 8 84 100 100) + (rect 8 284 214 232) + (rect 50 226 16 16) + (rect 50 558 16 16) + (rect 8 84 100 100) + (rect 8 284 214 232) + (rect 50 226 16 16) + (rect 50 558 16 16) + (rect 8 84 100 100) + (rect 8 284 214 232) +) +. PASS successfullyParsed is true TEST COMPLETE