"expect is not defined" when using with jest

• @testing-library/jest-dom version: 4.0.0
• node version: 12.8.0
• npm (or yarn) version: 6.10.2

Relevant code or config:

Jest config

module.exports = {
  snapshotSerializers: ['jest-emotion'],
  setupFilesAfterEnv: ['./config/jest.js']
};

jest.js file

require('@testing-library/jest-dom/extend-expect');

What you did:

run the npm test

What happened:

Getting error expect is not defined …

Determining test suites to run...

  ● Test suite failed to run

    ReferenceError: expect is not defined

      at Object.<anonymous> (node_modules/@testing-library/jest-dom/dist/extend-expect.js:7:1)
      at Object.newLoader [as .js] (node_modules/pirates/lib/index.js:104:7)
      at Object.<anonymous> (node_modules/@testing-library/jest-dom/extend-expect.js:2:1)

Reproduction:

https://github.com/tomitrescak/react-boilerplate/tree/Demo

Problem description:

I cannot run my tests

Suggested solution: