Use the configuration for determining the binary to use for testing.

tools/test.dart

 #!/usr/bin/env dart_bin
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library("test");
 
 #import("testing/dart/test_runner.dart");
 #import("testing/dart/test_options.dart");
 
 #import("../tests/standalone/test_config.dart");
 #import("../tests/corelib/test_config.dart");
 
 main() {
   var optionsParser = new TestOptionsParser();
   var configuration = optionsParser.parse(new Options().arguments);
   if (configuration == null) return;
   var queue = new ProcessQueue(configuration['tasks']);
-  new StandaloneTestSuite().forEachTest(queue.runTest);
-  new CorelibTestSuite().forEachTest(queue.runTest);
+  new StandaloneTestSuite(configuration).forEachTest(queue.runTest);
+  new CorelibTestSuite(configuration).forEachTest(queue.runTest);
 }