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diff --git a/test/built-ins/AsyncGeneratorFunction/invoked-as-function-single-argument.js b/test/built-ins/AsyncGeneratorFunction/invoked-as-function-single-argument.js
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+++ b/test/built-ins/AsyncGeneratorFunction/invoked-as-function-single-argument.js
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+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-asyncgeneratorfunction
+description: >
+    When invoked via the function invocation pattern with a single argument,
+    the AsyncGeneratorFunction intrinsic creates a valid async generator whose body is the
+    first argument evaluated as source code.
+features: [async-iteration]
+flags: [async]
+---*/
+
+var AsyncGeneratorFunction = Object.getPrototypeOf(async function* () {}).constructor;
+
+var g = AsyncGeneratorFunction('yield 1;');
+var iter = g();
+var result;
+
+
+iter.next().then(function(result) {
+  assert.sameValue(result.value, 1, 'First result `value`');
+  assert.sameValue(result.done, false, 'First result `done` flag');
+}).then(undefined, $DONE)
+
+iter.next().then(function(result) {
+  assert.sameValue(result.value, undefined, 'Final result `value`');
+  assert.sameValue(result.done, true, 'Final result `done` flag');
+}).then($DONE, $DONE)