anchor.diff:                     ) ->
     {ok, {{401, []}, [{"Content-Type", "application/json"}], <<"{
       \"error\": \"unauthorized\"
  +}
  +"/utf8>>}};
  +
  +%% Mock response for unexpected disallow test:
  +mock_lhttpc_request( "http://127.0.0.1/unexpected-disallow"
  +                   , "GET"
  +                   , []
  +                   , _
  +                   , _Timeout
  +                   , _Options
  +                   ) ->
  +  {ok, {{200, []}, [{"Content-Type", "application/json"}], <<"{
  +    \"ok\": true,
  +    \"extra_value\": \"test\"
   }
   "/utf8>>}}.
   
  
positive.code: > Accept: text/html
  > Content-Type: application/vnd.katt.test-v{{<version}}+json
  {
      \"ok\": {{<some_var}}
  }
  < 404
  Not found
  
negative.code:                  , Scenario
                   , _
                   , _
                   , [ {_, _, _, {fail, [ {not_equal, {status, _, _}}
                                        , {undefined, {"ok", _, _}}
                                        ]}}
                     ]
                   }
                 , katt:run(Scenario)
                 ).
  
  katt_run_with_unexpected_disallow() ->
    Scenario = "/mock/unexpected-disallow.apib",
    ?_assertMatch( { fail
                   , Scenario
                   , _
                   , _
                   , [ {_, _, _, {fail, [ {unexpected, {"extra_value", _, _}}
                                        ]}}
                     ]
                   }
  