This is a testharness.js-based test.
Harness Error. harness_status.status = 1 , harness_status.message = 1 duplicate test name: "XMLHttpRequest is not exposed to ServiceWorkerGlobalScope"
PASS XMLHttpRequest is not exposed to ServiceWorkerGlobalScope 
PASS XMLHttpRequest is not exposed to ServiceWorkerGlobalScope 
Harness: the test ran to completion.