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diff --git a/js/src/tests/test262/built-ins/AsyncFunction/shell.js b/js/src/tests/test262/built-ins/AsyncFunction/shell.js
new file mode 100644
index 0000000000..7af18bddd7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/AsyncFunction/shell.js
@@ -0,0 +1,43 @@
+// GENERATED, DO NOT EDIT
+// file: hidden-constructors.js
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: |
+  Provides uniform access to built-in constructors that are not exposed to the global object.
+defines:
+  - AsyncArrowFunction
+  - AsyncFunction
+  - AsyncGeneratorFunction
+  - GeneratorFunction
+---*/
+
+var AsyncArrowFunction = Object.getPrototypeOf(async () => {}).constructor;
+var AsyncFunction = Object.getPrototypeOf(async function () {}).constructor;
+var AsyncGeneratorFunction = Object.getPrototypeOf(async function* () {}).constructor;
+var GeneratorFunction = Object.getPrototypeOf(function* () {}).constructor;
+
+// file: isConstructor.js
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: |
+    Test if a given function is a constructor function.
+defines: [isConstructor]
+features: [Reflect.construct]
+---*/
+
+function isConstructor(f) {
+    if (typeof f !== "function") {
+      throw new Test262Error("isConstructor invoked with a non-function value");
+    }
+
+    try {
+        Reflect.construct(function(){}, [], f);
+    } catch (e) {
+        return false;
+    }
+    return true;
+}