@@ -211,12 +211,16 @@ ObjectDefineProperty(MessagePort.prototype, inspect.custom, {
 
 ObjectDefineProperty(MessagePort.prototype, SymbolToStringTag, {
   __proto__: null,
+  writable: false,
+  enumerable: false,
   configurable: true,
   value: 'MessagePort',
 });
 
 ObjectDefineProperty(MessageChannel.prototype, SymbolToStringTag, {
   __proto__: null,
+  writable: false,
+  enumerable: false,
   configurable: true,
   value: 'MessageChannel',
 });
@@ -474,6 +478,13 @@ class BroadcastChannel extends EventTarget {
 }
 
 ObjectDefineProperties(BroadcastChannel.prototype, {
+  [SymbolToStringTag]: {
+    __proto__: null,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+    value: 'BroadcastChannel',
+  },
   name: kEnumerableProperty,
   close: kEnumerableProperty,
   postMessage: kEnumerableProperty,
 
@@ -4,7 +4,7 @@ require('../common');
 
 const assert = require('assert');
 
-const classesToBeTested = [ MessageChannel, MessagePort ];
+const classesToBeTested = [ MessageChannel, MessagePort, BroadcastChannel ];
 
 classesToBeTested.forEach((cls) => {
   assert.strictEqual(cls.prototype[Symbol.toStringTag], cls.name);
@@ -15,3 +15,7 @@ classesToBeTested.forEach((cls) => {
 const channel = new MessageChannel();
 assert.strictEqual(Object.prototype.toString.call(channel), '[object MessageChannel]');
 assert.strictEqual(Object.prototype.toString.call(channel.port1), '[object MessagePort]');
+
+const broadcastChannel = new BroadcastChannel('string-tag');
+assert.strictEqual(Object.prototype.toString.call(broadcastChannel), '[object BroadcastChannel]');
+broadcastChannel.close();