[at-container-anchored-parsing.html]
  [Query condition should be valid: anchored(fallback)]
    expected: FAIL

  [Query condition should be valid: anchored(fallback: none)]
    expected: FAIL

  [Query condition should be valid: (anchored(fallback: inline-start block-end))]
    expected: FAIL

  [Query condition should be valid: anchored(not ((fallback: --foo) or (fallback: --bar flip-inline)))]
    expected: FAIL