The box should move horizontally 200px over 1s, in 4 equal increments.

FAIL - "-webkit-transform.4" property for "box" element at 0.25s expected: 50 but saw: matrix(1, 0, 0, 1, 81.713303, 0)
FAIL - "-webkit-transform.4" property for "box" element at 0.5s expected: 100 but saw: matrix(1, 0, 0, 1, 160.482788, 0)
FAIL - "-webkit-transform.4" property for "box" element at 0.75s expected: 150 but saw: matrix(1, 0, 0, 1, 192.137558, 0)