[idl-reflection.tentative.html]
  [[Element\] ariaActionsElements is null by default]
    expected: FAIL

  [[ElementInternals\] ariaActionsElements is null by default]
    expected: FAIL

  [[Element\] Content attribute with resolvable IDREFs reflects to those elements]
    expected: FAIL

  [[Element\] Unresolvable IDREFs reflect to an empty list]
    expected: FAIL

  [[Element\] IDL setter writes empty string to the aria-actions content attribute]
    expected: FAIL

  [[Element\] Setting to [\] writes empty string to the content attribute]
    expected: FAIL

  [[Element\] Disconnecting a target hides it; reconnecting restores it]
    expected: FAIL

  [[Element\] IDL setter takes precedence over the content attribute value]
    expected: FAIL

  [[Element\] Cross-shadow-tree targets are filtered out]
    expected: FAIL