inish();
  assert_equals(anim.effect.getComputedTiming().currentIteration, 0);
  assert_equals(anim.effect.getComputedTiming().progress, 0);
}, 'Active time in after phase with forwards fill and negative end delay'
   + ' greater in magnitude than the active duration is zero');

test(t => {
  const anim = createDiv(t).animate(null, { duration: 1000,
                                            iterations: 2.3,
                                            delay: 500,
                                           