diff --git a/packages/playwright-core/src/server/chromium/crNetworkManager.ts b/packages/playwright-core/src/server/chromium/crNetworkManager.ts
index 6411457a32..93981d717e 100644
--- a/packages/playwright-core/src/server/chromium/crNetworkManager.ts
+++ b/packages/playwright-core/src/server/chromium/crNetworkManager.ts
@@ -368,6 +368,10 @@ export class CRNetworkManager {
 
   _createResponse(request: InterceptableRequest, responsePayload: Protocol.Network.Response, hasExtraInfo: boolean): network.Response {
     const getResponseBody = async () => {
+      const fulfilledBody = request._route?._fulfilledBody;
+      if (fulfilledBody)
+        return fulfilledBody;
+
       const contentLengthHeader = Object.entries(responsePayload.headers).find(header => header[0].toLowerCase() === 'content-length');
       const expectedLength = contentLengthHeader ? +contentLengthHeader[1] : undefined;
 
@@ -595,6 +599,7 @@ class RouteImpl implements network.RouteDelegate {
   private readonly _session: CRSession;
   private _interceptionId: string;
   _alreadyContinuedParams: Protocol.Fetch.continueRequestParameters | undefined;
+  _fulfilledBody: Buffer | undefined;
 
   constructor(session: CRSession, interceptionId: string) {
     this._session = session;
@@ -616,6 +621,7 @@ class RouteImpl implements network.RouteDelegate {
 
   async fulfill(response: types.NormalizedFulfillResponse) {
     const body = response.isBase64 ? response.body : Buffer.from(response.body).toString('base64');
+    this._fulfilledBody = Buffer.from(body, 'base64');
 
     const responseHeaders = splitSetCookieHeader(response.headers);
     await catchDisallowedErrors(async () => {
diff --git a/tests/page/page-request-fulfill.spec.ts b/tests/page/page-request-fulfill.spec.ts
index 16f559b467..047ea2b800 100644
--- a/tests/page/page-request-fulfill.spec.ts
+++ b/tests/page/page-request-fulfill.spec.ts
@@ -457,3 +457,32 @@ it('should fulfill with gzip and readback', {
   await expect(page.locator('body')).toHaveCSS('background-color', 'rgb(255, 192, 203)');
   expect(await response.text()).toContain(`<div>hello, world!</div>`);
 });
+
+it('should not go to the network for fulfilled requests body', {
+  annotation: { type: 'issue', description: 'https://github.com/microsoft/playwright/issues/30760' },
+}, async ({ page, server, browserName }) => {
+  await page.route('**/one-style.css', async route => {
+    return route.fulfill({
+      status: 404,
+      contentType: 'text/plain',
+      body: 'Not Found! (mocked)',
+    });
+  });
+
+  let serverHit = false;
+  server.setRoute('/one-style.css', (req, res) => {
+    serverHit = true;
+    res.setHeader('Content-Type', 'text/css');
+    res.end('body { background-color: green; }');
+  });
+
+  const responsePromise = page.waitForResponse('**/one-style.css');
+  await page.goto(server.PREFIX + '/one-style.html');
+  const response = await responsePromise;
+  const body = await response.text();
+  // In webkit the response body is not available.
+  if (browserName !== 'webkit')
+    expect(body).toBe('Not Found! (mocked)');
+  expect(serverHit).toBe(false);
+});
+