The testharness files come from
https://github.com/w3c/testharness.js (commit 2486f01bf4c58de1c1b7cb39322af7b55c6c700b)
without any modification.

These tests are copyright by W3C and/or the author listed in the test
file. The tests are dual-licensed under the W3C Test Suite License:
http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
and the BSD 3-clause License:
http://www.w3.org/Consortium/Legal/2008/03-bsd-license
under W3C's test suite licensing policy:
http://www.w3.org/Consortium/Legal/2008/04-testsuite-copyright

