```js
// vitest.config.js

import { defineConfig } from 'vitest/config';
import { mergeConfig } from 'vite';

import viteConfig from './vite.config';

export default mergeConfig(
  viteConfig,
  defineConfig({
    test: {
      globals: true,
      environment: 'jsdom',
      clearMocks: true,
      setupFiles: './src/setupTests.js', //👈 Our configuration file enabled here
    },
  }),
);
```