Use the new test runner.

test/build/handles_long_paths_test.dart

Index: test/build/handles_long_paths_test.dart
diff --git a/test/build/handles_long_paths_test.dart b/test/build/handles_long_paths_test.dart
index 3b8b17b60e42b010a5811eccead0111cddef2dc4..9ff9a9b1221aaf1df6e8f5ffe3d8fd08f5820c13 100644
--- a/test/build/handles_long_paths_test.dart
+++ b/test/build/handles_long_paths_test.dart
@@ -2,6 +2,10 @@
 // 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.
 
+// Dart2js can take a long time to compile dart code, so we increase the timeout
+// to cope with that.
+@Timeout.factor(3)
+
 import 'package:scheduled_test/scheduled_test.dart';
 
 import 'package:path/path.dart' as path;
@@ -10,8 +14,6 @@ import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
-  initConfig();
-
   // This is a regression test for dartbug.com/14442.
   //
   // If you have a long chain of path dependencies with long relative paths,
@@ -27,10 +29,6 @@ main() {
   // path at the OS to choke on.
 
   integration("handles long relative paths", () {
-    // Dart2js can take a long time to compile dart code, so we increase the
-    // timeout to cope with that.
-    currentSchedule.timeout *= 3;
-
     d.dir("some_long_dependency_name", [
       d.libPubspec("foo", "0.0.1"),
       d.dir("lib", [