storybook/code/lib/preview-api/vitest.config.ts

import { defineConfig, mergeConfig } from 'vitest/config';
import { sep, posix } from 'path';
import { vitestCommonConfig } from '../../vitest.workspace';

export default mergeConfig(
  vitestCommonConfig,
  defineConfig({
    test: {
      environment: 'node',
      name: __dirname.split(sep).slice(-2).join(posix.sep),
    },
  })
);