postman-playwright

The Postman Playwright integration. This plugin captures API traffic during your Playwright UI tests so the Postman CLI can analyse it — match observed calls to your Postman collections, run pm.test assertions against the responses, and surface contract drift, coverage gaps, and silent failures the UI alone can't catch.

This package is the capture half of the workflow. It is meant to be used alongside postman-cli.

Installation

npm install --save-dev postman-cli postman-playwright

@playwright/test (>=1.40.0) is a peer dependency — bring your own version.

Usage

Wrap Playwright's test with attachNetworkCapture in your spec files:

import { test as baseTest, expect } from '@playwright/test';
import { attachNetworkCapture } from 'postman-playwright';

const test = attachNetworkCapture(baseTest);

test('has title', async ({ page }) => {
  await page.goto('https://playwright.dev/');
  await expect(page).toHaveTitle(/Playwright/);
});

That is the only change in your spec files. The page fixture, test.describe, test.beforeEach, tags — everything else works exactly as before.

Run your tests through the Postman CLI to capture and analyse in one step:

postman application test -- npx playwright test

Captured traffic is written to pm-results/ and analysed against your Postman collections. Use --environment to inject collection variables.

Resources

• Playwright Integration Guide — End-to-end workflow, coverage policies, noise filters, and capturing traffic into collections (link coming soon)

Support

• Postman Support — For general support and troubleshooting
• GitHub Issues — For bug reports and feature requests