How do I locate or create a playwright.config.ts file in a C# Playwright project?

When you add Playwright to a C# (or any non-TypeScript) project, the configuration file (playwright.config.ts) is not created by default. You'll need to create it manually if you want to change defaults such as the testIdAttribute.

For example, you can add a new file named playwright.config.ts at the root of your project with the following content:

TYPESCRIPTCopied
import { defineConfig } from '@playwright/test';

export default defineConfig({
  use: {
    testIdAttribute: 'data-pw'
  }
});

Once added, Playwright will pick up your custom configuration when running tests. If you’re also using the Playwright CLI, you can verify your configuration by running commands such as npx playwright test --config=playwright.config.ts.

If you prefer not to manage a separate configuration file, you must provide similar options through environment variables or command line flags, but the configuration file is the recommended approach for maintainability.