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diff --git a/deps/v8/test/mjsunit/es6/large-classes-properties.js b/deps/v8/test/mjsunit/es6/large-classes-properties.js
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+++ b/deps/v8/test/mjsunit/es6/large-classes-properties.js
@@ -0,0 +1,39 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+(function testLargeClassesProperties(){
+  // This is to test for dictionary mode when there more than
+  // kMaxNumberOfDescriptors (1024) properties.
+  const kLimit = 1030;
+  let evalString = "(function(i) { " +
+      "let clazz = class { " +
+      "   constructor(i) { this.value = i;";
+  for (let i = 0; i < kLimit ; i++) {
+    evalString  += "this.property"+i +" = "+i+"; "
+  }
+  evalString += "}};" +
+      " return (new clazz(i)); })";
+
+  let fn = eval(evalString);
+  %PrepareFunctionForOptimization(fn);
+  assertEquals(fn(1).value, 1);
+  assertEquals(fn(2).value, 2);
+  assertEquals(fn(3).value, 3);
+  %OptimizeFunctionOnNextCall(fn);
+  assertEquals(fn(4).value, 4);
+
+  let instance = fn(1);
+  assertEquals(Object.getOwnPropertyNames(instance).length, kLimit+1);
+
+  // Get and set all properties.
+  for (let i = 0; i < kLimit; i++) {
+    const key = "property" + i;
+    assertEquals(instance[key], i);
+    const value = "value"+i;
+    instance[key] = value;
+    assertEquals(instance[key], value);
+  }
+})();