Jest does not exit after running end-to-end app test about nestjs-redis HOT 3 CLOSED

import { AppModule } from '../src/app.module';
import { INestApplication } from '@nestjs/common';
import { Test, TestingModule } from '@nestjs/testing';
import request from 'supertest';

describe('AppController (e2e)', () => {
  let app: INestApplication;

  beforeAll(async () => {
    const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [AppModule],
    }).compile();

    app = moduleFixture.createNestApplication();
    await app.init();
  });

  afterAll(async () => {
    await app.close();
  });

  it('/ (GET)', () => request(app.getHttpServer()).get('/').expect(200).expect('Hello World!'));
});

 PASS  apps/api/test/app.e2e-spec.ts (28.075 s)
  AppController (e2e)
    ✓ / (GET) (21 ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        28.726 s, estimated 31 s
Ran all test suites matching /app.e2e/i.
Jest did not exit one second after the test run has completed.

This usually means that there are asynchronous operations that weren't stopped in your tests. Consider running Jest with `--detectOpenHandles` to troubleshoot this issue.