Mockjax remote jsonp failure

gistfile1.js

asyncTest('Response returns jsonp', function() {
	$.mockjax({
		url: 'http://example.com/jsonp*',
		contentType: 'text/json',
		proxy: 'test_jsonp.js'
	});
	window.abcdef123456 = function(json) {
		ok( true, 'JSONP Callback executed');
		deepEqual(json, { "data" : "JSONP is cool" });
	};
	
	$.ajax({
		url: 'http://example.com/jsonp?callback=?',
		jsonpCallback: 'abcdef123456',
		dataType: 'jsonp',
		error: noErrorCallbackExpected,
		complete: function(xhr) {
			equals(xhr.getResponseHeader('Content-Type'), 'text/json', 'Content type of text/json');
			start();
		}
	});
	$.mockjaxClear();
});