[shadowrootadoptedstylesheets-serialization.html]
  [Element.getHTML() round-trips shadowrootadoptedstylesheets across absent, empty, basic, and whitespace values.]
    expected: FAIL

  [getHTML() ignores script-added entries in adoptedStyleSheets and emits only the authored shadowrootadoptedstylesheets value.]
    expected: FAIL

  [getHTML() with an empty authored shadowrootadoptedstylesheets value is unaffected by script mutations.]
    expected: FAIL