diff --git a/Tools/wasm/README.md b/Tools/wasm/README.md
index 9288598a0abc29..efe9a3550c3e19 100644
--- a/Tools/wasm/README.md
+++ b/Tools/wasm/README.md
@@ -84,6 +84,17 @@ make a node application that "embeds" the interpreter instead of acting like the
CLI you will need to write your own alternative to `node_entry.mjs`.
+### Running tests
+
+After building, you can run the full test suite with:
+```shell
+./cross-build/wasm32-emscripten/build/python/python.sh -m test -uall
+```
+You can run the browser smoke test with:
+```shell
+./Tools/wasm/emscripten/browser_test/run_test.sh
+```
+
### The Web Example
When building for Emscripten, the web example will be built automatically. It
diff --git a/Tools/wasm/emscripten/browser_test/.gitignore b/Tools/wasm/emscripten/browser_test/.gitignore
new file mode 100644
index 00000000000000..3d54eab82a0d71
--- /dev/null
+++ b/Tools/wasm/emscripten/browser_test/.gitignore
@@ -0,0 +1,4 @@
+node_modules
+test-results
+playwright-report
+test_log.txt
diff --git a/Tools/wasm/emscripten/browser_test/index.spec.ts b/Tools/wasm/emscripten/browser_test/index.spec.ts
new file mode 100644
index 00000000000000..2594b73022bcc1
--- /dev/null
+++ b/Tools/wasm/emscripten/browser_test/index.spec.ts
@@ -0,0 +1,15 @@
+import { test, expect } from '@playwright/test';
+
+test('has title', async ({ page }) => {
+ await page.goto('/');
+
+ await expect(page).toHaveTitle("Emscripten PyRepl Example");
+ const xterm = await page.locator('css=#terminal');
+ await expect(xterm).toHaveText(/Python.*on emscripten.*Type.*for more information/);
+ const xtermInput = await page.getByRole('textbox');
+ await xtermInput.pressSequentially(`def f():\nprint("hello", "emscripten repl!")\n\n`);
+ await xtermInput.pressSequentially(`f()\n`);
+ await expect(xterm).toHaveText(/hello emscripten repl!/);
+
+});
+
diff --git a/Tools/wasm/emscripten/browser_test/package-lock.json b/Tools/wasm/emscripten/browser_test/package-lock.json
new file mode 100644
index 00000000000000..044e3c19ce15f7
--- /dev/null
+++ b/Tools/wasm/emscripten/browser_test/package-lock.json
@@ -0,0 +1,672 @@
+{
+ "name": "browser_test",
+ "version": "1.0.0",
+ "lockfileVersion": 3,
+ "requires": true,
+ "packages": {
+ "": {
+ "name": "browser_test",
+ "version": "1.0.0",
+ "license": "ISC",
+ "dependencies": {
+ "@playwright/test": "^1.54.1",
+ "@types/node": "^24.1.0",
+ "http-server": "^14.1.1",
+ "playwright": "^1.54.1"
+ }
+ },
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+ "license": "Apache-2.0",
+ "dependencies": {
+ "playwright": "1.54.1"
+ },
+ "bin": {
+ "playwright": "cli.js"
+ },
+ "engines": {
+ "node": ">=18"
+ }
+ },
+ "node_modules/@types/node": {
+ "version": "24.1.0",
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+ },
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+ "license": "MIT",
+ "engines": {
+ "node": ">= 0.4"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
+ },
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+ "license": "Apache-2.0",
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+ },
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+ "playwright": "cli.js"
+ },
+ "engines": {
+ "node": ">=18"
+ },
+ "optionalDependencies": {
+ "fsevents": "2.3.2"
+ }
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+ "license": "Apache-2.0",
+ "bin": {
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+ }
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+ "license": "MIT",
+ "dependencies": {
+ "async": "^3.2.6",
+ "debug": "^4.3.6"
+ },
+ "engines": {
+ "node": ">= 10.12"
+ }
+ },
+ "node_modules/qs": {
+ "version": "6.14.0",
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+ "license": "BSD-3-Clause",
+ "dependencies": {
+ "side-channel": "^1.1.0"
+ },
+ "engines": {
+ "node": ">=0.6"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
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+ "side-channel-map": "^1.0.1",
+ "side-channel-weakmap": "^1.0.2"
+ },
+ "engines": {
+ "node": ">= 0.4"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
+ }
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+ "node_modules/side-channel-list": {
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+ "object-inspect": "^1.13.3"
+ },
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+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
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+ "get-intrinsic": "^1.2.5",
+ "object-inspect": "^1.13.3",
+ "side-channel-map": "^1.0.1"
+ },
+ "engines": {
+ "node": ">= 0.4"
+ },
+ "funding": {
+ "url": "https://github.com/sponsors/ljharb"
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+ "license": "MIT"
+ },
+ "node_modules/whatwg-encoding": {
+ "version": "2.0.0",
+ "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-2.0.0.tgz",
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+ "license": "MIT",
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+}
diff --git a/Tools/wasm/emscripten/browser_test/package.json b/Tools/wasm/emscripten/browser_test/package.json
new file mode 100644
index 00000000000000..3320d4cccd0594
--- /dev/null
+++ b/Tools/wasm/emscripten/browser_test/package.json
@@ -0,0 +1,18 @@
+{
+ "name": "browser_test",
+ "version": "1.0.0",
+ "main": "index.js",
+ "scripts": {
+ "test": "echo \"Error: no test specified\" && exit 1"
+ },
+ "keywords": [],
+ "author": "",
+ "license": "ISC",
+ "description": "",
+ "dependencies": {
+ "@playwright/test": "^1.54.1",
+ "@types/node": "^24.1.0",
+ "http-server": "^14.1.1",
+ "playwright": "^1.54.1"
+ }
+}
diff --git a/Tools/wasm/emscripten/browser_test/playwright.config.ts b/Tools/wasm/emscripten/browser_test/playwright.config.ts
new file mode 100644
index 00000000000000..81d53ce11cb050
--- /dev/null
+++ b/Tools/wasm/emscripten/browser_test/playwright.config.ts
@@ -0,0 +1,22 @@
+import { defineConfig, devices } from '@playwright/test';
+
+export default defineConfig({
+ testDir: '.',
+ forbidOnly: true,
+ retries: 2,
+ reporter: process.env.CI ? 'dot' : 'html',
+ use: {
+ baseURL: 'http://localhost:8787',
+ trace: 'on-first-retry',
+ },
+ projects: [
+ {
+ name: 'chromium',
+ use: { ...devices['Desktop Chrome'] },
+ },
+ ],
+ webServer: {
+ command: 'npx http-server ../../../../cross-build/wasm32-emscripten/build/python/web_example_pyrepl_jspi/ -p 8787',
+ url: 'http://localhost:8787',
+ },
+});
diff --git a/Tools/wasm/emscripten/browser_test/run_test.sh b/Tools/wasm/emscripten/browser_test/run_test.sh
new file mode 100755
index 00000000000000..9166e0d740585e
--- /dev/null
+++ b/Tools/wasm/emscripten/browser_test/run_test.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+set -euo pipefail
+cd "$(dirname "$0")"
+rm -f test_log.txt
+echo "Installing node packages" | tee test_log.txt
+npm ci >> test_log.txt 2>&1
+echo "Installing playwright browsers" | tee test_log.txt
+npx playwright install 2>> test_log.txt
+echo "Running tests" | tee test_log.txt
+CI=1 npx playwright test | tee test_log.txt
diff --git a/Tools/wasm/emscripten/web_example_pyrepl_jspi/index.html b/Tools/wasm/emscripten/web_example_pyrepl_jspi/index.html
index 1f72bd24e79a04..cc7413b5caa982 100644
--- a/Tools/wasm/emscripten/web_example_pyrepl_jspi/index.html
+++ b/Tools/wasm/emscripten/web_example_pyrepl_jspi/index.html
@@ -1,6 +1,7 @@
+ Emscripten PyRepl Example
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