[element-img.sub.html]
  [sec-fetch-site - src - HTTPS upgrade, no attributes]
    expected: FAIL

  [sec-fetch-site - srcset - HTTPS upgrade, no attributes]
    expected: FAIL

  [sec-fetch-site - src - HTTPS downgrade (header not sent), no attributes]
    expected: FAIL

  [sec-fetch-site - srcset - HTTPS downgrade (header not sent), no attributes]
    expected: FAIL