[animation-composition-valid.tentative.html]
  [e.style['animation-composition'\] = "replace" should set the property value]
    expected: FAIL

  [e.style['animation-composition'\] = "add" should set the property value]
    expected: FAIL

  [e.style['animation-composition'\] = "accumulate" should set the property value]
    expected: FAIL

  [e.style['animation-composition'\] = "replace, add, accumulate" should set the property value]
    expected: FAIL