The test is flaky some times (text failure or timeout) Diff: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r262612%20(13971)/http/tests/websocket/tests/hybi/send-object-tostring-check-diff.txt --- /home/slave/webkitgtk/gtk-linux-64-release-tests/build/layout-test-results/http/tests/websocket/tests/hybi/send-object-tostring-check-expected.txt +++ /home/slave/webkitgtk/gtk-linux-64-release-tests/build/layout-test-results/http/tests/websocket/tests/hybi/send-object-tostring-check-actual.txt @@ -3,7 +3,7 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS testObj.callCounter is 1 -FAIL closeEvent.wasClean should be true. Was false. +PASS closeEvent.wasClean is true PASS successfullyParsed is true TEST COMPLETE In the case above the test passed all the tests. The test baseline expects that the second test fails. Probably there's a timing threshold in the test that is making it to fail some times, or even time out.