Is there a YUI equivalent to jQuery's $.holdReady()?

Question

I have a situation where some third party code is executing a callback with

YUI({
  delayUntil: 'domready'
}).use(....)

My issue is that I'm using another asynchronous script loader for my code, and I need to delay that callback until after my scripts have loaded. I'm using Yeti for unit testing which injects YUI into test pages, otherwise my code has nothing to do with YUI.

jQuery has a holdReady method that delays executing domready handlers registered through jQuery until some later time. I'm wondering if YUI has some equivalent method. This is for a test page and the code under test doesn't use YUI, so if the solution involves some ugly hack that'll be fine.

EDIT:

It turns out that Yeti uses its own scoped YUI object, and there isn't a way to access it anyway, so even if I found an answer to this question, it wouldn't help me here. In case anyone is wondering how I fixed the Yeti specific problem without finding a way in YUI to defer document ready handlers, here is my code:

!function(){
    var mochaListeners = [];
    var fakeRunner;
    // Stub for Yeti in case mocha isn't loaded on domready
    window.mocha = {
        run : function(){
            return fakeRunner = {
                on : function(type, fn){
                    mochaListeners.push([type, fn]);
                }
            };
        }
    };
    yepnope([
        {
            load : [
                'assets/lib/lodash.js',
                'assets/lib/jquery.js',
                'assets/lib/css/mocha.css',
                'assets/lib/mocha.js', 
                'assets/lib/chai.js', 
                'assets/lib/sinon.js'
            ],
            complete : function(){
                mocha.setup('bdd')
            }
        },{
            load : 'assets/js/my_tests.js',
            complete : function(){
                executeTests = function(){
                    var runner = mocha.run();
                    runner.ignoreLeaks = true;
                    _.forEach(mochaListeners, function(listener){
                        runner.on(listener[0], function(){
                            _.extend(fakeRunner, runner);
                            listener[1].apply(this, arguments);
                        });
                    });
                };
                if(document.readyState === 'complete')
                    executeTests();
                else
                    $(executeTests);
            }
    }]);
}();