diff --git a/examples/calculator/package.json b/examples/calculator/package.json
index 64648d2..d0d6657 100644
--- a/examples/calculator/package.json
+++ b/examples/calculator/package.json
@@ -19,7 +19,7 @@
   },
   "homepage": "https://github.com/stevekinney/testing-javascript#readme",
   "devDependencies": {
-    "@tailwindcss/nesting": "^0.0.0-insiders.565cd3e",
+    "@playwright/test": "^1.47.2",
     "@testing-library/dom": "^10.4.0",
     "@testing-library/user-event": "^14.5.2",
     "@vitest/ui": "^2.1.1",
diff --git a/examples/calculator/playwright.config.js b/examples/calculator/playwright.config.js
new file mode 100644
index 0000000..5d440da
--- /dev/null
+++ b/examples/calculator/playwright.config.js
@@ -0,0 +1,78 @@
+// @ts-check
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// require('dotenv').config({ path: path.resolve(__dirname, '.env') });
+
+/**
+ * @see https://playwright.dev/docs/test-configuration
+ */
+export default defineConfig({
+  testDir: './tests',
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    // baseURL: 'http://127.0.0.1:3000',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'] },
+    },
+
+    {
+      name: 'webkit',
+      use: { ...devices['Desktop Safari'] },
+    },
+
+    /* Test against mobile viewports. */
+    // {
+    //   name: 'Mobile Chrome',
+    //   use: { ...devices['Pixel 5'] },
+    // },
+    // {
+    //   name: 'Mobile Safari',
+    //   use: { ...devices['iPhone 12'] },
+    // },
+
+    /* Test against branded browsers. */
+    // {
+    //   name: 'Microsoft Edge',
+    //   use: { ...devices['Desktop Edge'], channel: 'msedge' },
+    // },
+    // {
+    //   name: 'Google Chrome',
+    //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
+    // },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  // webServer: {
+  //   command: 'npm run start',
+  //   url: 'http://127.0.0.1:3000',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+});
diff --git a/examples/calculator/tests/counter.spec.js b/examples/calculator/tests/counter.spec.js
new file mode 100644
index 0000000..e924d05
--- /dev/null
+++ b/examples/calculator/tests/counter.spec.js
@@ -0,0 +1,2 @@
+import { test, expect } from '@playwright/test';
+import { createServer } from 'vite';