Setting Up React Component Testing

[SebastianKurpSyn]

Hi!
I follow this introduction here
Using the custom webpack config and I still can't get a simple span to render in the cypress window.
Any suggestions on my next steps to debug?

My current screen:

The spec file

import { mount } from 'cypress-react-unit-test' 

function Button(props) {
  return <button>Nothing to do for now</button>;
}

describe('Checkbox', () => {
  it('renders the checkbox', () => {
    mount(<Button />)
  })
})

My plugins index:

module.exports = (on, config) => {
    // from the root of the project (folder with cypress.json file)
    config.env.webpackFilename = 'webpack.config.js'
    // and disable code coverage
    config.env.coverage = false
    require('cypress-react-unit-test/plugins/load-webpack')(on, config)
  
    // IMPORTANT to return the config object
    // with the any changed environment variables
    return config
  }