In the root level of your testing folder, install the @axe-core/watcher package and all of its dependencies using npm or your preferred package manager (for example, Yarn or pnpm).
```
npm install --save-dev @axe-core/watcher
```
In your test file or files, import the webdriverConfig function, the wrapWebdriver function, and the WebdriverController class from @axe-core/watcher:
```
import {
  webdriverConfig,
  wrapWebdriver,
  WebdriverController
} from '@axe-core/watcher'
```

Update your test setup code (typically in a before or beforeAll block), specifying Chrome options when instantiating your browser instance, providing your API key:

// Original code:
const browser = await new Builder()
  .forBrowser('chrome')
  .build()

// Becomes:
const API_KEY = process.env.API_KEY

const browser = await new Builder()
  .forBrowser('chrome')
  .setChromeOptions(
    webdriverConfig({
      axe: {
        apiKey: API_KEY
      }
    }
  )
  .build()

Create an instance of the WebdriverController:

const controller = new WebdriverController(browser)

Write your browser instance with the wrapWebdriver() function:
```
browser = wrapWebdriver(browser, controller)
```
Finally, ensure all test results from axe Watcher are flushed out. To do this, add the following block of code to your test teardown code (typically in an afterEach block):
```
afterEach(async () => {
  await controller.flush()
})
```