[viewport-change.html]
  [picture: source (max-width:500px) broken image, img valid image, resize to narrow]
    expected:
      FAIL

  [picture: source (max-width:500px) broken image, img broken image, resize to narrow]
    expected:
      FAIL

  [picture: source (max-width:500px) broken image, img broken image, resize to wide]
    expected:
      FAIL

  [picture: source (max-width:500px) valid image, img broken image, resize to wide]
    expected:
      FAIL