▶ OK /css/css-sizing/stretch/flex-line-004.html
  │   ▶ FAIL [expected PASS] .stretch 1
  │   │   → assert_equals: 
  │   │   → <div class="container">
  │   │   →   <div class="stretch" style="height: 75px; border-color: cyan" data-expected-width="26">a</div>
  │   │   →   <div class="stretch" style="height: 75px; border-color: magenta" data-expected-width="26">b</div>
  │   │   → </div>
  │   │   → width expected 26 but got 19
  │   │ FAIL [expected PASS] .stretch 2
  │   │   → assert_equals: 
  │   │   → <div class="container">
  │   │   →   <div class="stretch" style="height: 75px; border-color: cyan" data-expected-width="26">a</div>
  │   │   →   <div class="stretch" style="height: 75px; border-color: magenta" data-expected-width="26">b</div>
  │   │   → </div>
  │   │   → width expected 26 but got 19
  │   │ 
  │   │ assert_tolerance@http://web-platform.test:8000/resources/check-layout-th.js:24:22
  │   │ checkExpectedValues@http://web-platform.test:8000/resources/check-layout-th.js:72:25
  │   │ checkSubtreeExpectedValues@http://web-platform.test:8000/resources/check-layout-th.js:7:44
  │   │ window.checkLayout/</<@http://web-platform.test:8000/resources/check-layout-th.js:229:34
  │   │ Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2869:25
  │   │ test@http://web-platform.test:8000/resources/testharness.js:633:30
  │   │ window.checkLayout/<@http://web-platform.test:8000/resources/check-layout-th.js:222:13
  │   │ window.checkLayout@http://web-platform.test:8000/resources/check-layout-th.js:220:29
  └   └ @http://web-platform.test:8000/css/css-sizing/stretch/flex-line-004.html:49:46