Very simple version of Isolates.

pkg/scheduled_test/test/descriptor/async_test.dart

Index: pkg/scheduled_test/test/descriptor/async_test.dart
diff --git a/pkg/scheduled_test/test/descriptor/async_test.dart b/pkg/scheduled_test/test/descriptor/async_test.dart
index 15763bb54edd53031cc4c7b3603d5879a146359e..f96eaccf7253bd98fe994a47ca39507d87e13928 100644
--- a/pkg/scheduled_test/test/descriptor/async_test.dart
+++ b/pkg/scheduled_test/test/descriptor/async_test.dart
@@ -10,7 +10,9 @@ import 'package:scheduled_test/scheduled_test.dart';
 import '../metatest.dart';
 import 'utils.dart';
 
-void main() {
+void main(List<String> args, message) {
+  initialMessage = message;

[Lasse Reichstein Nielsen, 2013/10/25 09:42:49]

What is "initialMessage"?
Appears to be a global variable in metatest.dart, but it's not obvious what it's
used for. 
A comment maybe, even if just // used by metatest.dart.

Or perhaps make a function so you can call:
  metaTestInit(message);
instead, or rename the "initialMessage" to something that signals what it's used
for.

[floitsch, 2013/10/25 13:11:01]

Done.

+
   setUpTimeout();
 
   expectTestsPass("async().create() forwards to file().create", () {