[onvisibilitychange.html]
  expected:
    if os == "linux" and os_version == "24.04" and processor == "x86_64" and display == "x11" and opt: [OK, TIMEOUT]
  [onvisibilitychange attribute is a proper event handler]
    expected:
      if os == "linux" and os_version == "24.04" and processor == "x86_64" and display == "x11" and opt: [PASS, NOTRUN]