This is a testharness.js-based test.
Found 3 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] parent is picture, following sibling source inserted
  assert_equals: complete shouldn't have changed expected true but got false
[FAIL] parent is picture, following sibling source removed
  assert_equals: complete shouldn't have changed expected true but got false
[FAIL] parent is picture, following sibling source has srcset set
  assert_equals: complete shouldn't have changed expected true but got false
Harness: the test ran to completion.