我在 Windows 上运行 Rails 3.2.3，并正在学习本教程： http: //net.tutsplus.com/tutorials/ruby/the-intro-to-rails-screencast-i-wish-i-had/。当我运行“守卫”（时间 4:34）时，我收到以下错误，而不是看到失败。我已经从我的 gemfile 中删除了已删除的 minitest。有什么建议么？
C:\Users\Steven\Documents\Sites\tasks>guard
←[0m
Guard here! It looks like your project has a Gemfile, yet you are running
`guard` outside of Bundler. If this is your intent, feel free to ignore this
message. Otherwise, consider using `bundle exec guard` to ensure your
dependencies are loaded correctly.
(You can run `guard` with --no-bundler-warning to get rid of this message.)
←[0m
←[0mGuard could not detect any of the supported notification libraries.←[0m
←[0mGuard is now watching at 'C:/Users/Steven/Documents/Sites/tasks'←[0m
←[0mGuard::RSpec is running, with RSpec 2!←[0m
←[0m←[0mRunning all specs←[0m
ansi: 'gem install win32console' to use color on Windows
gem install minitest
C:/Ruby192/lib/ruby/gems/1.9.1/gems/turn-0.9.6/lib/turn/minitest.rb:23:in `<top
(required)>': MiniTest v1.6.0 is out of date. (RuntimeError)
`gem install minitest` and add `gem 'minitest' to you test helper.
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/turn-0.9.6/lib/turn.rb:13:in `r
equire'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/turn-0.9.6/lib/turn.rb:13:in `<
top (required)>'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler/runti
me.rb:68:in `require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler/runti
me.rb:68:in `block (2 levels) in require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler/runti
me.rb:66:in `each'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler/runti
me.rb:66:in `block in require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler/runti
me.rb:55:in `each'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler/runti
me.rb:55:in `require'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.1.4/lib/bundler.rb:11
9:in `require'
from C:/Users/Steven/Documents/Sites/tasks/config/application.rb:13:in `
<top (required)>'
from C:/Users/Steven/Documents/Sites/tasks/config/environment.rb:2:in `r
equire'
from C:/Users/Steven/Documents/Sites/tasks/config/environment.rb:2:in `<
top (required)>'
from C:/Users/Steven/Documents/Sites/tasks/spec/spec_helper.rb:3:in `req
uire'
from C:/Users/Steven/Documents/Sites/tasks/spec/spec_helper.rb:3:in `<to
p (required)>'
from C:/Users/Steven/Documents/Sites/tasks/spec/requests/tasks_spec.rb:1
:in `require'
from C:/Users/Steven/Documents/Sites/tasks/spec/requests/tasks_spec.rb:1
:in `<top (required)>'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/configuration.rb:780:in `load'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/configuration.rb:780:in `block in load_spec_files'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/configuration.rb:780:in `map'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/configuration.rb:780:in `load_spec_files'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/command_line.rb:22:in `run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/runner.rb:69:in `run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rspec-core-2.11.0/lib/rspec/cor
e/runner.rb:8:in `block in autorun'
> C:/Ruby192/lib/ruby/gems/1.9.1/gems/listen-0.4.7/lib/listen/adapters/windows.r
b:42:in `join': Interrupt
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/listen-0.4.7/lib/listen/adapter
s/windows.rb:42:in `stop'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/listen-0.4.7/lib/listen/listene
r.rb:55:in `stop'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/guard-1.2.3/lib/guard.rb:169:in
`stop'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/guard-1.2.3/lib/guard/cli.rb:10
2:in `rescue in start'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/guard-1.2.3/lib/guard/cli.rb:99
:in `start'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.15.2/lib/thor/task.rb:27
:in `run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.15.2/lib/thor/invocation
.rb:120:in `invoke_task'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.15.2/lib/thor.rb:275:in
`dispatch'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.15.2/lib/thor/base.rb:40
8:in `start'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/guard-1.2.3/bin/guard:6:in `<to
p (required)>'
from C:/Ruby192/bin/guard:23:in `load'
from C:/Ruby192/bin/guard:23:in `<main>'