// remove any already installed AtmosphereBehaviors on the page
List<AtmosphereBehavior> behaviors = page.getBehaviors(AtmosphereBehavior.class);
page.remove(behaviors.toArray(new AtmosphereBehavior[behaviors.size()]));
// install AtmosphereBehavior that doesn't use Meteor
AtmosphereBehavior atmosphereBehavior = new TesterAtmosphereBehavior(wicketTester, eventBus);
page.add(atmosphereBehavior);
// start the page to collect all @Subscribe methods in the component hierarchy
wicketTester.startPage(page);