[subsumption_algorithm-host_sources-protocols.html]
  [`https` is more restrictive than `http`.]
    expected: FAIL

  [`http:` does not subsume other protocols.]
    expected: FAIL

  [If scheme source is present in returned csp, it must be specified in required csp too.]
    expected: FAIL

  [All scheme sources must be subsumed.]
    expected: FAIL