Why doesn't ExecutorService require shutdown in junit?

Question

Java

Good afternoon.
If using ExecutorService in main method, then shutdown must be used to terminate the program

public static void main(String[] args) {
        ExecutorService executorService = Executors.newCachedThreadPool();
        executorService.submit(() -> Utils.sleepSeconds(1));

        System.out.println("Done");
        executorService.shutdown();
    }

However, this is not required in a Junit test. The test ends without shutdown.

@org.junit.jupiter.api.Test
    public void test() {
        ExecutorService executorService = Executors.newCachedThreadPool();
        executorService.submit(() -> Utils.sleepSeconds(1));

        System.out.println("Done");
    }

I don't quite understand why this is happening. What does Junit do to avoid the need for shutdown?