in junit-addons/src/main/java/com/mycila/junit/concurrent/ConcurrentRunnerScheduler.java [41:49]
public ConcurrentRunnerScheduler(String name, int nThreadsMin, int nThreadsMax) {
executorService = new ThreadPoolExecutor(
nThreadsMin, nThreadsMax,
10L, TimeUnit.SECONDS,
new SynchronousQueue<Runnable>(),
new NamedThreadFactory(name),
new ThreadPoolExecutor.CallerRunsPolicy());
completionService = new ExecutorCompletionService<Void>(executorService);
}