Contributing to Ruby on Rails — Ruby on Rails Guidesを読んで
rails/rails-dev-box: A virtual machine for Ruby on Rails core developmentを入れました。

vagrant@rails-dev-box:/vagrant/rails/actionview$ bundle exec rake test
と/vagrant/rails/actionviewディレクトリでtestを実行してみましたが
最後に

  1) Failure:
RenderTest#test_render_action_upcased [/vagrant/rails/actionview/test/actionpack/controller/render_test.rb:742]:
ActionView::MissingTemplate expected but nothing was raised.

220 runs, 307 assertions, 1 failures, 0 errors, 0 skips
rake aborted!
Command failed with status (1): [ruby -w -I"lib:test" -I"/var/lib/gems/2.3.0/gems/rake-10.4.2/lib" "/var/lib/gems/2.3.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb" "test/actionpack/abstract/abstract_controller_test.rb" "test/actionpack/abstract/helper_test.rb" "test/actionpack/abstract/layouts_test.rb" "test/actionpack/abstract/render_test.rb" "test/actionpack/controller/capture_test.rb" "test/actionpack/controller/layout_test.rb" "test/actionpack/controller/render_test.rb" "test/actionpack/controller/view_paths_test.rb" ]

Tasks: TOP => test => test:integration:action_pack
(See full trace by running task with --trace)

となって終了します。

テストに使っているRails自体は
rails/rails at 4-2-stable: Ruby on Rails
(コミット番号: e531c86e6bb0b623cd18c97a7a32ba981e8fb2ce)
でして

Code Statusがbuild passingなのでテストに失敗することがそもそもおかしいと思うのですが、認識が違っているのでしょうか？

画像の説明をここに入力