[sibling-function-invalidation.html]
  [Initially 6th sibling]
    expected: FAIL

  [5th sibling after removal]
    expected: FAIL

  [Initially 6 siblings]
    expected: FAIL

  [5 siblings after removal]
    expected: FAIL

  [Initially 6th slotted sibling]
    expected: FAIL

  [5th sibling after slot change]
    expected: FAIL

  [Initially 6 slotted siblings]
    expected: FAIL

  [5 siblings after slot change]
    expected: FAIL