diff --git a/test/intl402/Intl/builtin.js b/test/intl402/Intl/builtin.js
index e74fb94036..a4d4b56ec0 100644
--- a/test/intl402/Intl/builtin.js
+++ b/test/intl402/Intl/builtin.js
@@ -2,7 +2,7 @@
 // This code is governed by the license found in the LICENSE file.
 
 /*---
-es5id: 8.0_L15
+esid: intl-object
 description: >
     Tests that Intl meets the requirements for built-in objects
     defined by the introduction of chapter 17 of the ECMAScript
@@ -10,10 +10,6 @@ description: >
 author: Norbert Lindenberg
 ---*/
 
-assert.sameValue(Object.prototype.toString.call(Intl), "[object Object]",
-                 "The [[Class]] internal property of a built-in non-function object must be " +
-                 "\"Object\".");
-
 assert(Object.isExtensible(Intl), "Built-in objects must be extensible.");
 
 assert.sameValue(Object.getPrototypeOf(Intl), Object.prototype,
diff --git a/test/intl402/Intl/proto.js b/test/intl402/Intl/proto.js
deleted file mode 100644
index 34fe92641c..0000000000
--- a/test/intl402/Intl/proto.js
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2013 Mozilla Corporation. All rights reserved.
-// This code is governed by the license found in the LICENSE file.
-
-/*---
-es5id: 8.0
-description: Tests that Intl has Object.prototype as its prototype.
-author: Norbert Lindenberg
----*/
-
-assert.sameValue(Object.getPrototypeOf(Intl), Object.prototype, "Intl doesn't have Object.prototype as its prototype.");
diff --git a/test/intl402/Intl/toStringTag/toString.js b/test/intl402/Intl/toStringTag/toString.js
new file mode 100644
index 0000000000..8d77b36aa5
--- /dev/null
+++ b/test/intl402/Intl/toStringTag/toString.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl-toStringTag
+description: >
+  Object.prototype.toString utilizes Intl[@@toStringTag] and doesn't special-case Intl namespace object.
+info: |
+  Object.prototype.toString ( )
+
+  [...]
+  14. Else, let builtinTag be "Object".
+  15. Let tag be ? Get(O, @@toStringTag).
+  16. If Type(tag) is not String, set tag to builtinTag.
+  17. Return the string-concatenation of "[object ", tag, and "]".
+
+  Intl [ @@toStringTag ]
+
+  The initial value of the @@toStringTag property is the String value "Intl".
+features: [Symbol.toStringTag]
+---*/
+
+assert.sameValue(Intl.toString(), "[object Intl]");
+assert.sameValue(Object.prototype.toString.call(Intl), "[object Intl]");
+
+Object.defineProperty(Intl, Symbol.toStringTag, { value: "test262" });
+assert.sameValue(Intl.toString(), "[object test262]");
+assert.sameValue(Object.prototype.toString.call(Intl), "[object test262]");
+
+assert(delete Intl[Symbol.toStringTag]);
+assert.sameValue(Intl.toString(), "[object Object]");
+assert.sameValue(Object.prototype.toString.call(Intl), "[object Object]");
diff --git a/test/intl402/Intl/toStringTag/toStringTag.js b/test/intl402/Intl/toStringTag/toStringTag.js
new file mode 100644
index 0000000000..2a764bad02
--- /dev/null
+++ b/test/intl402/Intl/toStringTag/toStringTag.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl-toStringTag
+description: >
+  Property descriptor of Intl[@@toStringTag].
+info: |
+  Intl [ @@toStringTag ]
+
+  The initial value of the @@toStringTag property is the String value "Intl".
+
+  This property has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
+features: [Symbol.toStringTag]
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Intl, Symbol.toStringTag, {
+  value: "Intl",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});