我在运行rake测试时遇到了一些错误，虽然我的应用程序工作正常。 我想删除这些错误以备将来帮助。 我得到以下几行消息：
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.2.8/lib/rack/lock.rb:13:in `block in call'
<internal:prelude>:10:in `synchronize'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.2.8/lib/rack/lock.rb:13:in `call'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/actionpack-3.0.7/lib/action_dispatch/middleware/static.rb:30:in `call'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:168:in `call'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.0.7/lib/rails/rack/log_tailer.rb:14:in `call'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.2.8/lib/rack/content_length.rb:13:in `call'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.2.8/lib/rack/handler/webrick.rb:52:in `service'
c:/Ruby193/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
c:/Ruby193/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
c:/Ruby193/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
任何帮助将不胜感激