[canvas-descendants-focusability-004.tentative.html]
  [<button data-focusable="false">]
    expected: FAIL

  [<section tabindex="-1" data-focusable="false">]
    expected: FAIL

  [<div tabindex="-1" data-focusable="false">]
    expected: FAIL

  [<span tabindex="-1" data-focusable="false">]
    expected: FAIL

  [<a href="#" data-focusable="false">]
    expected: FAIL