This is a testharness.js-based test.
[FAIL] flexbox > item 2
assert_equals: \n<item data-offset-y="68" data-expected-margin-bottom="0"></item>\noffsetTop expected 68 but got 8
[FAIL] flexbox > item 4
assert_equals: \n<item data-offset-y="68" data-expected-margin-top="0"></item>\noffsetTop expected 68 but got 8
Harness: the test ran to completion.