code: @Deployment public void testAct901(){
    Date startTime=processEngineConfiguration.getClock().getCurrentTime();
    ProcessInstance pi=runtimeService.startProcessInstanceByKey("multiInstanceSubProcess");
    List<Task> tasks=taskService.createTaskQuery().processInstanceId(pi.getId()).orderByTaskName().asc().list();
    processEngineConfiguration.getClock().setCurrentTime(new Date(startTime.getTime() + 61000L));
    List<Job> timers=managementService.createTimerJobQuery().list();
    assertEquals(5,timers.size());
    for (  Job timer : timers) {
      managementService.moveTimerToExecutableJob(timer.getId());
      managementService.executeJob(timer.getId());
    }
    tasks=taskService.createTaskQuery().processInstanceId(pi.getId()).orderByTaskName().asc().list();
    assertEquals(0,tasks.size());
  }
  