Using something from testing library causes warning: Jest did not exit one second after the test run has completed.

Describe the bug

When I import and using something from @testing-library/react-native the following warning appears:

Jest did not exit one second after the test run has completed.

Expected behavior

This warning does not appear

Steps to Reproduce

Just import render and use it in a test:

import React from 'react';
import { Text } from 'react-native';

import { render } from '@testing-library/react-native';

it('testing library working', () => {
  const { getByText } = render(<Text>123</Text>);

  const text = getByText(/123/);
  expect(text).toBeTruthy();
});

Screenshots

Versions

npmPackages:
    @testing-library/react-native: ^9.1.0 => 9.1.0 
    react: ^17.0.2 => 17.0.2 
    react-native: ^0.67.3 => 0.67.4 
    react-test-renderer: ^17.0.2 => 17.0.2

[jamesL92]

I was about to say - downgrading Jest to 27.5.1 seems to have fixed it for me.

I still feel like this issue should be reopened though, feels like there’s something in the way @testing-library/react-native methods operate that cause this to be an issue in jest v28+.

[dennis-gonzales]

I am using Expo and I got the same error. I solved it by using Jest version compatible to Expo (in my case 26.x). The error occurred when I was using Jest 28.x

Can confirm that downgrading to the version that expo supports fixed the issue for me. Command I used fyr

expo install jest -- -D