Stable unexpected results (1): 
  ▶ OK /preload/prefetch-document.html
  │   ▶ FAIL [expected PASS] different-site document prefetch with 'as=document' should not be consumed
  │   │   → assert_equals: expected 2 but got 1
  │   │ 
  │   │ @http://web-platform.test:8000/preload/prefetch-document.html:45:18
  │   │ async*Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2684:25
  │   │ promise_test/tests.promise_tests</<@http://web-platform.test:8000/resources/testharness.js:738:36
  └   └ promise_test/tests.promise_tests<@http://web-platform.test:8000/resources/testharness.js:737:20