 '12.5px'},
    0.25: {opacity: '0.25', left: '25px'},
    0.375: {opacity: '0.25', left: '25px'},
    0.5: {opacity: '0.25', left: '25px'},
    0.625: {opacity: '0.375', left: '37.5px'},
    0.75: {opacity: '0.5', left: '50px'},
    0.875: {opacity: '0.625', left: '62.5px'},
    1: {opacity: '0.75', left: '75px'},
  }, 'with easing on first keyframe');

  assertAnimationStyles([
    {opacity: '0', left: '0px'},
    {opacity: '0.5', left: '50px', easing: 'steps(2, start)'},
    {opacity: '0.75', left: '75px