INFO - b'[2017-06-29 21:33:28] INFO: Testing url https://www.macys.com/ run 1\n'
INFO - b'[2017-06-29 21:33:39] ERROR: SyntaxError: Unexpected token \x1f in JSON at position 0\n'
INFO - b'SyntaxError: Unexpected token \x1f in JSON at position 0\n'
INFO - b' at Object.parse (native)\n'
INFO - b' at parsePostData (/usr/src/app/node_modules/chrome-har/index.js:570:37)\n'
See https://github.com/sitespeedio/sitespeed.io/issues/1654