[timeline-offset-keyframes-hidden-subject.html]
  expected:
    if (os == "mac") and not debug: [OK, TIMEOUT]
  [Keyframes with timeline-offsets ignored when timeline is inactive]
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1823509
    expected:
      if (os == "mac") and not debug: [FAIL, TIMEOUT]
      FAIL