[CustomElementRegistry-upgrade.tentative.html]
  [upgrade is a function on both global and scoped CustomElementRegistry]
    expected: FAIL

  [upgrade is a no-op when called on a shadow root with no association]
    expected: FAIL

  [upgrade should upgrade a candidate element when called on a shadow root with an association]
    expected: FAIL

  [upgrade should not upgrade a candidate element not associated with the registry]
    expected: FAIL