Fix a bunch of pub tests that started running "pub get".

test/barback/subdirectories_test.dart

 // Copyright (c) 2014, 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 'package:path/path.dart' as p;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../serve/utils.dart';
 import '../test_pub.dart';
@@ skipping 32 matching lines @@
           d.dir("two", [
             d.dir("inner", [d.file("file.txt", "two")])
           ]),
           d.nothing("nope")
         ])
       ])
     ]).validate();
   });
 
   integration("serves subdirectories", () {
-    pubServe(args: [webOne, webTwoInner]);
+    pubServe(args: [webOne, webTwoInner], shouldGetFirst: true);
 
     requestShouldSucceed("inner/file.txt", "one", root: webOne);
     requestShouldSucceed("file.txt", "two", root: webTwoInner);
     expectNotServed("web");
     expectNotServed(p.join("web", "three"));
 
     endPubServe();
   });
 }