[headingoffset-mutations.html]
  [headingoffset property mutations on host (not slot) update slotted headings]
    expected: FAIL

  [headingoffset property mutations propagate via host chain through nested shadow roots]
    expected: FAIL

  [headingoffset property mutations propagate via host chain across two levels of shadow DOM]
    expected: FAIL

  [headingoffset property propagates only via host chain through three nested shadow DOMs]
    expected: FAIL

  [headingoffset property mutations update headings at multiple shadow DOM levels independently]
    expected: FAIL

  [headingoffset attribute mutations on host (not slot) update slotted headings]
    expected: FAIL

  [headingoffset attribute mutations propagate via host chain through nested shadow roots]
    expected: FAIL

  [headingoffset attribute mutations propagate via host chain across two levels of shadow DOM]
    expected: FAIL

  [headingoffset attribute propagates only via host chain through three nested shadow DOMs]
    expected: FAIL

  [headingoffset attribute mutations update headings at multiple shadow DOM levels independently]
    expected: FAIL

  [slot name attribute changes do not change slotted heading levels]
    expected: FAIL

  [element slot attribute changes do not change heading levels]
    expected: FAIL

  [slot element removal and addition do not change slotted heading levels]
    expected: FAIL

  [default-to-named slot transitions do not change heading levels]
    expected: FAIL

  [swapping slot names does not change slotted heading levels]
    expected: FAIL

  [manual slot assignment does not change heading levels]
    expected: FAIL

  [manual slot reassignment between slots does not change heading levels]
    expected: FAIL

  [non-HTML elements (SVG) slotted with heading descendants get updated via host chain]
    expected: FAIL

  [non-HTML elements (MathML) slotted with heading descendants get updated via host chain]
    expected: FAIL

  [manual slot assignment of non-HTML elements does not change heading levels]
    expected: FAIL