diff --git a/packages/playwright/src/isomorphic/teleReceiver.ts b/packages/playwright/src/isomorphic/teleReceiver.ts
index da377b099f..6391f8a64c 100644
--- a/packages/playwright/src/isomorphic/teleReceiver.ts
+++ b/packages/playwright/src/isomorphic/teleReceiver.ts
@@ -19,8 +19,6 @@ import type { Metadata } from '../../types/test';
 import type * as reporterTypes from '../../types/testReporter';
 import type { ReporterV2 } from '../reporters/reporterV2';
 
-// -- Reuse boundary -- Everything below this line is reused in the vscode extension.
-
 export type StringIntern = (s: string) => string;
 export type JsonLocation = reporterTypes.Location;
 export type JsonError = string;
@@ -613,7 +611,7 @@ export function serializeRegexPatterns(patterns: string | RegExp | (string | Reg
 
 export function parseRegexPatterns(patterns: JsonPattern[]): (string | RegExp)[] {
   return patterns.map(p => {
-    if (p.s)
+    if (p.s !== undefined)
       return p.s;
     return new RegExp(p.r!.source, p.r!.flags);
   });
diff --git a/packages/playwright/src/isomorphic/testServerConnection.ts b/packages/playwright/src/isomorphic/testServerConnection.ts
index aeda824429..156af26e8c 100644
--- a/packages/playwright/src/isomorphic/testServerConnection.ts
+++ b/packages/playwright/src/isomorphic/testServerConnection.ts
@@ -38,6 +38,7 @@ export class TestServerConnection implements TestServerInterface, TestServerInte
   private _ws: WebSocket;
   private _callbacks = new Map<number, { resolve: (arg: any) => void, reject: (arg: Error) => void }>();
   private _connectedPromise: Promise<void>;
+  private _isClosed = false;
 
   constructor(wsURL: string) {
     this.onClose = this._onCloseEmitter.event;
@@ -70,11 +71,16 @@ export class TestServerConnection implements TestServerInterface, TestServerInte
       this._ws.addEventListener('error', r);
     });
     this._ws.addEventListener('close', () => {
+      this._isClosed = true;
       this._onCloseEmitter.fire();
       clearInterval(pingInterval);
     });
   }
 
+  isClosed(): boolean {
+    return this._isClosed;
+  }
+
   private async _sendMessage(method: string, params?: any): Promise<any> {
     const logForTest = (globalThis as any).__logForTest;
     logForTest?.({ method, params });
diff --git a/packages/playwright/src/reporters/teleEmitter.ts b/packages/playwright/src/reporters/teleEmitter.ts
index df77370dd2..670a8c16c8 100644
--- a/packages/playwright/src/reporters/teleEmitter.ts
+++ b/packages/playwright/src/reporters/teleEmitter.ts
@@ -21,8 +21,6 @@ import type * as teleReceiver from '../isomorphic/teleReceiver';
 import { serializeRegexPatterns } from '../isomorphic/teleReceiver';
 import type { ReporterV2 } from './reporterV2';
 
-// -- Reuse boundary -- Everything below this line is reused in the vscode extension.
-
 export type TeleReporterEmitterOptions = {
   omitOutput?: boolean;
   omitBuffers?: boolean;