diff --git a/packages/angular_devkit/build_angular/src/builders/dev-server/specs/live-reload_spec.ts b/packages/angular_devkit/build_angular/src/builders/dev-server/specs/live-reload_spec.ts
index 84d908431312..164261c2c592 100644
--- a/packages/angular_devkit/build_angular/src/builders/dev-server/specs/live-reload_spec.ts
+++ b/packages/angular_devkit/build_angular/src/builders/dev-server/specs/live-reload_spec.ts
@@ -95,7 +95,8 @@ function createProxy(target: string, secure: boolean, ws = true): ProxyInstance
 
 async function goToPageAndWaitForWS(page: Page, url: string): Promise<void> {
   const baseUrl = url.replace(/^http/, 'ws');
-  const socksRequest = baseUrl[baseUrl.length - 1] === '/' ? `${baseUrl}ws` : `${baseUrl}/ws`;
+  const socksRequest =
+    baseUrl[baseUrl.length - 1] === '/' ? `${baseUrl}ng-cli-ws` : `${baseUrl}/ng-cli-ws`;
   // Create a Chrome dev tools session so that we can capturing websocket request.
   // https://github.com/puppeteer/puppeteer/issues/2974
 
diff --git a/packages/angular_devkit/build_angular/src/webpack/configs/dev-server.ts b/packages/angular_devkit/build_angular/src/webpack/configs/dev-server.ts
index 698d9ccffdc7..d6171b848562 100644
--- a/packages/angular_devkit/build_angular/src/webpack/configs/dev-server.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/configs/dev-server.ts
@@ -298,7 +298,7 @@ function getWebSocketSettings(
     };
   }
 
-  const webSocketPath = posix.join(servePath, 'ws');
+  const webSocketPath = posix.join(servePath, 'ng-cli-ws');
 
   return {
     webSocketServer: {