@Override
  public Properties getDistributedSystemProperties() {
    Properties result = super.getDistributedSystemProperties();
    result.put(ENABLE_NETWORK_PARTITION_DETECTION, "false");
    result.put(LOCATORS, "localhost[" + locatorPort + "]");
    return result;
  }
tests for the concurrentMapOperations. there are more tests in ClientServerMiscDUnitTest
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ConcurrentMapOpsDUnitTest.java