[promise-rejection-events.html]
  expected:
    if (os == "linux") and webrender and not debug and fission: ["OK", "TIMEOUT"]
    if (os == 'linux' and os_version == '18.04') and not debug and fission: ["OK", "TIMEOUT"]  # Bug 1607867
  [rejectionhandled is dispatched from a queued task, and not immediately]
    expected:
      if (os == "linux") and webrender and not debug and fission: ["PASS", "TIMEOUT"]

