[popover-shadow-dom.tentative.html]
  expected:
    if (os == "android") and fission: [OK, TIMEOUT]
  [Popovers located inside shadow DOM can still be shown]
    expected: FAIL

  [anchor references do not cross shadow boundaries]
    expected: FAIL

  [anchor references use the flat tree not the DOM tree]
    expected: FAIL

  [The popover stack is preserved across shadow-inclusive ancestors]
    expected: FAIL