third_party/web_platform_tests/tools/wptrunner/wptrunner/config.json

{"host": "%(host)s",
 "ports":{"http":[8000, 8001],
          "https":[8443],
          "ws":[8888]},
 "check_subdomains":false,
 "bind_hostname":%(bind_hostname)s,
 "ssl":{}}