[inert-with-fullscreen-element.html]
  expected:
    if (os == "mac") and not debug: [OK, ERROR]
  [If the fullscreen element has the 'inert' attribute, everything becomes inert]
    expected:
      if (os == "mac") and not debug: [PASS, NOTRUN]

  [If an ancestor of the fullscreen element has the 'inert' attribute, the fullscreen element escapes inertness]
    expected:
      if (os == "mac") and not debug: [PASS, NOTRUN]