diff --git a/lib/internal/url.js b/lib/internal/url.js
index 9ab469c9ff..84e04ee9d8 100644
--- a/lib/internal/url.js
+++ b/lib/internal/url.js
@@ -223,10 +223,6 @@ class URL {
     parse(this, input, base);
   }
 
-  get [Symbol.toStringTag]() {
-    return this instanceof URL ? 'URL' : 'URLPrototype';
-  }
-
   get [special]() {
     return (this[context].flags & binding.URL_FLAGS_SPECIAL) !== 0;
   }
@@ -314,6 +310,10 @@ Object.defineProperties(URL.prototype, {
       return ret;
     }
   },
+  [Symbol.toStringTag]: {
+    configurable: true,
+    value: 'URL'
+  },
   href: {
     enumerable: true,
     configurable: true,
diff --git a/test/parallel/test-whatwg-url-properties.js b/test/parallel/test-whatwg-url-properties.js
index 0b5e633677..b762659fb6 100644
--- a/test/parallel/test-whatwg-url-properties.js
+++ b/test/parallel/test-whatwg-url-properties.js
@@ -45,7 +45,7 @@ assert.strictEqual(url.searchParams, oldParams);  // [SameObject]
 // Note: this error message is subject to change in V8 updates
 assert.throws(() => url.origin = 'http://foo.bar.com:22',
               new RegExp('TypeError: Cannot set property origin of' +
-                         ' \\[object Object\\] which has only a getter'));
+                         ' \\[object URL\\] which has only a getter'));
 assert.strictEqual(url.origin, 'http://foo.bar.com:21');
 assert.strictEqual(url.toString(),
                    'http://user:pass@foo.bar.com:21/aaa/zzz?l=25#test');
@@ -121,7 +121,7 @@ assert.strictEqual(url.hash, '#abcd');
 // Note: this error message is subject to change in V8 updates
 assert.throws(() => url.searchParams = '?k=88',
               new RegExp('TypeError: Cannot set property searchParams of' +
-                         ' \\[object Object\\] which has only a getter'));
+                         ' \\[object URL\\] which has only a getter'));
 assert.strictEqual(url.searchParams, oldParams);
 assert.strictEqual(url.toString(),
                    'https://user2:pass2@foo.bar.org:23/aaa/bbb?k=99#abcd');
diff --git a/test/parallel/test-whatwg-url-tostringtag.js b/test/parallel/test-whatwg-url-tostringtag.js
index 9e0927955f..55b0a48ce7 100644
--- a/test/parallel/test-whatwg-url-tostringtag.js
+++ b/test/parallel/test-whatwg-url-tostringtag.js
@@ -10,9 +10,12 @@ const sp = url.searchParams;
 
 const test = [
   [toString.call(url), 'URL'],
-  [toString.call(Object.getPrototypeOf(url)), 'URLPrototype'],
   [toString.call(sp), 'URLSearchParams'],
-  [toString.call(Object.getPrototypeOf(sp)), 'URLSearchParamsPrototype']
+  [toString.call(Object.getPrototypeOf(sp)), 'URLSearchParamsPrototype'],
+  // Web IDL spec says we have to return 'URLPrototype', but it is too
+  // expensive to implement; therefore, use Chrome's behavior for now, until
+  // spec is changed.
+  [toString.call(Object.getPrototypeOf(url)), 'URL']
 ];
 
 test.forEach((row) => {