vitest/test/dts-playwright/vite.config.ts

import { playwright } from '@vitest/browser-playwright'
import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    browser: {
      provider: playwright({
        launchOptions: {
          timeout: 1234,
          // @ts-expect-error test type error
          slowMo: 'wrong',
        },
      }),
      instances: [
        {
          browser: 'chromium',
          provider: playwright({
            launchOptions: {
              timeout: 1234,
              // @ts-expect-error test type error
              slowMo: 'wrong',
            },
          }),
        },
      ],
    },
  },
})