This is a testharness.js-based test.
[FAIL] serialization test Ed448
  promise_test: Unhandled rejection with value: object "NotSupportedError: Failed to execute 'generateKey' on 'SubtleCrypto': Algorithm: Unrecognized name"
[FAIL] serialization test {name: Ed448}
  promise_test: Unhandled rejection with value: object "NotSupportedError: Failed to execute 'generateKey' on 'SubtleCrypto': Algorithm: Unrecognized name"
Harness: the test ran to completion.