navigate route with querystring

Will Backbone.Router.navigate set test to true:

var test = false;

var Router = Backbone.Router.extend({
  routes: {
    'posts': 'showPosts'
  },
  showPosts: function () {
    test = true;
  }
});

router = new Router();
Backbone.history.start();

router.navigate('posts?foo=3', {trigger: true});

assert.ok(test);

Eg, will posts?foo=3 fragment will match the posts route by default, or do I have to set another route for that, for example: posts?*querystring?

Thank you

PS: I know there exist the backbone-query-parameters but I want to know just for backbone.