This should be written into the document

FAIL document policy violation observed promise_test: Unhandled rejection with value: object "ReferenceError: Can't find variable: ReportingObserver"
FAIL Only the second reporting endpoint received reports. assert_unreached: A report of document-policy-violation from https://localhost:9443/reporting/document-reporting-override-endpoint.https.sub.html is not found. Reached unreachable code