[scrollbar-gutter-valid.html]
  [e.style['scrollbar-gutter'\] = "auto" should set the property value]
    expected: FAIL

  [e.style['scrollbar-gutter'\] = "stable" should set the property value]
    expected: FAIL

  [e.style['scrollbar-gutter'\] = "stable both-edges" should set the property value]
    expected: FAIL

  [e.style['scrollbar-gutter'\] = "both-edges stable" should set the property value]
    expected: FAIL