[api-and-duplicate-headers.any.html]
[fetch() and duplicate Content-Length/Content-Type headers]
expected: FAIL
[XMLHttpRequest and duplicate Content-Length/Content-Type headers]
expected: FAIL
[api-and-duplicate-headers.any.worker.html]
[fetch() and duplicate Content-Length/Content-Type headers]
expected: FAIL
[XMLHttpRequest and duplicate Content-Length/Content-Type headers]
expected: FAIL