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diff --git a/js/src/tests/test262/built-ins/AsyncGeneratorPrototype/throw/return-rejected-promise.js b/js/src/tests/test262/built-ins/AsyncGeneratorPrototype/throw/return-rejected-promise.js
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+// |reftest| async
+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-asyncgenerator-prototype-throw
+description: >
+  "throw" returns a rejected promise
+info: |
+  AsyncGenerator.prototype.next ( value )
+  1. Let generator be the this value.
+  2. Let completion be NormalCompletion(value).
+  3. Return ! AsyncGeneratorEnqueue(generator, completion).
+
+  AsyncGeneratorEnqueue ( generator, completion )
+  ...
+  2. Let promiseCapability be ! NewPromiseCapability(%Promise%).
+  ...
+  4. Let queue be generator.[[AsyncGeneratorQueue]].
+  5. Let request be AsyncGeneratorRequest{[[Completion]]: completion,
+     [[Capability]]: promiseCapability}.
+  6. Append request to the end of queue.
+  ...
+  9. Return promiseCapability.[[Promise]].
+
+  AsyncGeneratorReject ( generator, exception )
+  1. Assert: generator is an AsyncGenerator instance.
+  2. Let queue be generator.[[AsyncGeneratorQueue]].
+  3. Assert: queue is not an empty List.
+  4. Remove the first element from queue and let next be the value of that element.
+  5. Let promiseCapability be next.[[Capability]].
+  6. Perform ! Call(promiseCapability.[[Reject]], undefined, « exception »).
+  ...
+
+flags: [async]
+features: [async-iteration]
+---*/
+
+async function* g() {}
+
+var errormessage = "Promise rejected."
+var result = g().throw(new Test262Error(errormessage))
+
+assert(result instanceof Promise, "Expected result to be an instanceof Promise")
+
+result.then(
+  function () {
+    throw new Test262Error("Expected result to be rejected promise.");
+  },
+  function (e) {
+    if (!(e.message = errormessage)) {
+      throw new Test262Error("Expected thrown custom error, got " + e);
+    }
+  }
+).then($DONE, $DONE)