@Test
  public void alertListenerMessageIsNotReceivedByManagerForLevelNone() {
    changeAlertLevel(NONE);

    memberVM.invoke(() -> logger.fatal(alertMessage));

    managerVM.invoke(() -> verifyNoMoreInteractions(messageListener));
  }
Distributed tests for {@link AlertingService} with {@link DistributedSystemMXBean} in the JMX
Manager without any {@code NotificationListener}s.
geode-core/src/distributedTest/java/org/apache/geode/alerting/internal/api/AlertingServiceWithoutListenerDistributedTest.java