Fix a bug with the implementation of LiveSuite.

lib/src/runner/engine.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:async/async.dart' hide Result;
 import 'package:collection/collection.dart';
 import 'package:pool/pool.dart';
@@ skipping 236 matching lines @@
           }
         } else {
           controller = new LiveSuiteController(suite);
         }
 
         _addLiveSuite(controller.liveSuite);
 
         await _runPool.withResource(() async {
           if (_closed) return;
           await _runGroup(controller, controller.liveSuite.suite.group, []);
+          controller.noMoreLiveTests();
           loadResource.allowRelease(() => controller.close());
         });
       }));
     }, onDone: () {
       _onSuiteAddedController.close();
       _group.close();
     });
 
     return success;
   }
@@ skipping 212 matching lines @@
     var futures = allLiveTests.map((liveTest) => liveTest.close()).toList();
 
     // Closing the load pool will close the test suites as soon as their tests
     // are done. For browser suites this is effectively immediate since their
     // tests shut down as soon as they're closed, but for VM suites we may need
     // to wait for tearDowns or tearDownAlls to run.
     futures.add(_loadPool.close());
     await Future.wait(futures, eagerError: true);
   }
 }