Jest what does "No tests found, exiting with code 0" mean and how to remove it?

Question

Angular

There is a project on Angular 11.
I write tests on jest. I need to find out the test results of one file and it's easier for me to run the test file manually when I finish writing to some logical end, so I run the test through the terminal with the command yarn test --test-file autocomplete-adapter.spec.ts

The problem is that many lines appear with the text "No tests found, exiting" with code 0".

spoiler

In package.json, the command "test" simply executes "ng test"

Here is the code of the current test file

spoiler

import { fakeAsync, tick, waitForAsync } from '@angular/core/testing';
import { FormControl } from '@angular/forms';
import { of } from 'rxjs';
import { delay } from 'rxjs/operators';
import { AutocompleteAdapter } from './autocomplete-adapter';

describe('AutocompleteAdapter', () => {
  it('Должен быть создан класс', () => {
    const component = new AutocompleteAdapter(undefined);
    expect(component).toBeTruthy();
  });

  it(
    'Должно вернуть значение запроса',
    waitForAsync(() => {
      const callBack = () => of(['test']);
      const component = new AutocompleteAdapter(callBack);
      const control = new FormControl();
      expect(component).toBeTruthy();

      component.getResponseValueFromRequest(control).subscribe((response) => {
        console.log('response', response);
        // expect(response).toBeTruthy();
        // expect(response).toBe('[test]');
      });
      control.setValue('lala');
    })
  );
});

Actually, what does "No tests found, exiting with code 0" mean and how to remove it?