The following test fails in GTK after importing from WPT. For other platforms, the test should pass with patch in bug 234917 landed. imported/w3c/web-platform-tests/css/css-grid/layout-algorithm/flex-tracks-with-fractional-size.html It seems caused by the calls of "reftest-wait" in the test script. Test passes when the calls of "reftest-wait" are removed.
<rdar://problem/121074590>