E2E Testing with Playwright: Automate Regression Testing

After releasing a new version of an online store built on Next.js with a payment gateway integration, you discover that the checkout process fails with a 500 error when using cards from a specific bank. Manual regression testing would take two days, but the budget is already spent and deployment is blocked. In one project, we faced a situation where a payment library update broke the checkout flow. Manual testing took 3 days, while the fix took only 2 hours. After implementing Playwright, such regressions are detected in 10 seconds. These situations occur when test automation is missing or insufficient.

We implement end-to-end testing with Playwright—a framework from Microsoft that has become the standard for reliable automation. Our approach covers key scenarios of your website within 5–10 days and integrates tests into CI/CD, so every deployment is verified. This eliminates manual regressions and reduces production bugs by 80% or more, saving up to 80% of your regression testing budget. One e-commerce client saved $6,000 per month after implementing Playwright tests.

End-to-End Tests with Playwright: What and Why

Playwright is a modern end-to-end testing tool developed by Microsoft. It supports all major browsers: Chromium, Firefox, and WebKit. Unlike Cypress, Playwright runs outside the browser, allowing parallel test execution in multiple browsers simultaneously, mobile device emulation, and network request interception. This makes it the ideal choice for automating regression testing of web applications. Playwright is 3x faster than Cypress for parallel execution.

Advantages over Cypress

How Playwright Accelerates Regression Testing

Thanks to its architecture, Playwright tests run several times faster. Parallel execution with 4 workers reduces the runtime of 50 tests from 40 minutes to 5–10 minutes. Built-in auto-wait and network interception eliminate flaky tests, and tracing for failed scenarios allows finding the root cause in 5 minutes. As a result, regression checks that used to take a day are now done in an hour.

Which Scenarios Should Be Covered with End-to-End Tests?

We focus on the critical user path: registration, login, search, add to cart, checkout, payment. For these scenarios, we write tests with mocks for external services to ensure stability. We also cover complex business logic, such as multi-item carts, promo codes, and delivery address changes. Additionally, we incorporate user scenario testing to cover edge cases.

How We Implement End-to-End Tests: Step-by-Step

1. Audit and Planning. Analyze your site, identify critical scenarios, determine the set of pages and actions. Create a test matrix.
2. Develop Page Object Model. For each screen, create a class with interaction methods. Fixtures for API authentication speed up tests by 10x.
3. Write Tests. Write 30–50 tests for key scenarios, using mocks for unstable external calls (request mocking). Adjust Playwright configuration for your project.
4. CI/CD Integration. Set up test execution in GitHub Actions, GitLab CI, or Jenkins with parallel workers. Generate HTML reports with tracing.
5. Documentation and Handover. Transfer the project with README, run instructions, and architecture description. Train the team if needed.

What's Included in the Service

• Audit and selection of critical user scenarios
• Development of tests using Page Object Model
• Setup of mocks and network intercepts (request mocking)
• Integration with CI/CD pipeline (GitHub Actions, GitLab CI, Jenkins)
• Generation of reports (HTML, tracing)
• Documentation for running and maintaining tests
• Optional team training

Sample Playwright Configuration

import { defineConfig, devices } from '@playwright/test'; export default defineConfig({ testDir: './tests', timeout: 30_000, retries: process.env.CI ? 2 : 0, workers: process.env.CI ? 4 : undefined, reporter: [ ['html', { outputFolder: 'playwright-report' }], ['github'], ], use: { baseURL: process.env.BASE_URL || 'http://localhost:3000', trace: 'on-first-retry', screenshot: 'only-on-failure', }, projects: [ { name: 'chromium', use: { ...devices['Desktop Chrome'] } }, { name: 'firefox', use: { ...devices['Desktop Firefox'] } }, { name: 'webkit', use: { ...devices['Desktop Safari'] } }, { name: 'mobile-chrome', use: { ...devices['Pixel 7'] } }, { name: 'mobile-safari', use: { ...devices['iPhone 14'] } }, ], }); 

Time and Resource Requirements

Return on Investment

Implementing end-to-end tests pays off within 2–3 months by reducing regression time and production bugs. On one project, we cut regression testing from 2 days to 2 hours—a 90% time saving for the team. One client saved $6,000 per month after implementing Playwright tests, covering cross-browser testing, web application testing, and accessibility testing.

Playwright also supports visual snapshot testing, accessibility testing (via axe-core), and enables comprehensive test automation for modern web apps.

Why Order End-to-End Tests from Us?

We have been automating testing for over 5 years, delivering projects for 50+ websites across various sectors—from online stores to complex SaaS platforms. We guarantee at least an 80% reduction in production bugs after implementation. All tests undergo code review and follow best practices. Contact us for an audit of your project—we will assess it in one day and propose the optimal set of scenarios. Order end-to-end test development and eliminate manual regressions for good.

Learn more about Playwright capabilities in the official documentation.