diff --git a/tests/library/browsercontext-har.spec.ts b/tests/library/browsercontext-har.spec.ts
index 7913a079df..6afd8c54ea 100644
--- a/tests/library/browsercontext-har.spec.ts
+++ b/tests/library/browsercontext-har.spec.ts
@@ -120,6 +120,28 @@ it('should only page.routeFromHAR requests matching url filter', async ({ contex
   await expect(page.locator('body')).toHaveCSS('background-color', 'rgba(0, 0, 0, 0)');
 });
 
+it('should apply overrides before routing from har', async ({ context, asset }) => {
+  it.info().annotations.push({ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/29190' });
+  const path = asset('har-fulfill.har');
+  await context.routeFromHAR(path, { url: '**/*.js' });
+  const page = await context.newPage();
+  await context.route('http://no.playwright/my-script.js', async route => {
+    await route.fallback({
+      url: 'http://no.playwright/script2.js',
+    });
+  });
+  await context.route('http://test.example/', async route => {
+    await route.fulfill({
+      status: 200,
+      contentType: 'text/html',
+      body: '<script src="http://no.playwright/my-script.js"></script><div>hello</div>',
+    });
+  });
+  await page.goto('http://test.example/');
+  // HAR contains script2.js that sets the value.
+  expect(await page.evaluate('window.value')).toBe('foo');
+});
+
 it('should support regex filter', async ({ context, asset }) => {
   const path = asset('har-fulfill.har');
   await context.routeFromHAR(path, { url: /.*(\.js|.*\.css|no.playwright\/)$/ });
@@ -291,6 +313,7 @@ it('should round-trip har with postData', async ({ contextFactory, server }, tes
   expect(await page1.evaluate(fetchFunction, '3')).toBe('3');
   await context1.close();
 
+  server.reset();
   const context2 = await contextFactory();
   await context2.routeFromHAR(harPath);
   const page2 = await context2.newPage();
@@ -301,6 +324,40 @@ it('should round-trip har with postData', async ({ contextFactory, server }, tes
   expect(await page2.evaluate(fetchFunction, '4').catch(e => e)).toBeTruthy();
 });
 
+it('should record overridden requests to har', async ({ contextFactory, server }, testInfo) => {
+  it.info().annotations.push({ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/29190' });
+  server.setRoute('/echo', async (req, res) => {
+    const body = await req.postBody;
+    res.end(body.toString());
+  });
+
+  const harPath = testInfo.outputPath('har.zip');
+  const context1 = await contextFactory({ recordHar: { mode: 'minimal', path: harPath } });
+  const page1 = await context1.newPage();
+  await page1.goto(server.EMPTY_PAGE);
+  const fetchFunction = async (arg: { path: string, body: string }) => {
+    const response = await fetch(arg.path, { method: 'POST', body: arg.body });
+    return await response.text();
+  };
+  await page1.route('**/echo_redir', async route => {
+    await route.fallback({
+      url: server.PREFIX + '/echo',
+      postData: +route.request().postData() + 10,
+    });
+  });
+  expect(await page1.evaluate(fetchFunction, { path: '/echo_redir', body: '1' })).toBe('11');
+  expect(await page1.evaluate(fetchFunction, { path: '/echo_redir', body: '2' })).toBe('12');
+  await context1.close();
+
+  server.reset();
+  const context2 = await contextFactory();
+  await context2.routeFromHAR(harPath);
+  const page2 = await context2.newPage();
+  await page2.goto(server.EMPTY_PAGE);
+  expect(await page2.evaluate(fetchFunction, { path: '/echo', body: '11' })).toBe('11');
+  expect(await page2.evaluate(fetchFunction, { path: '/echo', body: '12' })).toBe('12');
+});
+
 it('should disambiguate by header', async ({ contextFactory, server }, testInfo) => {
   server.setRoute('/echo', async (req, res) => {
     res.end(req.headers['baz']);