[overscroll-behavior-single-axis.html]
  expected: TIMEOUT
  [overscroll-behavior-y:contain on an x-only scroller does not block vertical chaining]
    expected: TIMEOUT

  [overscroll-behavior-x:contain on a y-only scroller does not block horizontal chaining]
    expected: NOTRUN

  [overscroll-behavior-y:contain on a y-scroller still blocks vertical chaining (control)]
    expected: NOTRUN