/usr/ is in ruby-test-unit-context 0.5.0-2.
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..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/test/
/usr/lib/ruby/vendor_ruby/test/unit/
/usr/lib/ruby/vendor_ruby/test/unit/patches.rb
/usr/lib/ruby/vendor_ruby/test/unit/context/
/usr/lib/ruby/vendor_ruby/test/unit/context/context.rb
/usr/lib/ruby/vendor_ruby/test/unit/context/helpers.rb
/usr/lib/ruby/vendor_ruby/test/unit/context/shared.rb
/usr/lib/ruby/vendor_ruby/test/unit/context/version.rb
/usr/lib/ruby/vendor_ruby/test/unit/context/spec.rb
/usr/lib/ruby/vendor_ruby/test/unit/context.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/test-unit-context-0.5.0.gemspec
/usr/share/doc/
/usr/share/doc/ruby-test-unit-context/
/usr/share/doc/ruby-test-unit-context/copyright
/usr/share/doc/ruby-test-unit-context/changelog.Debian.gz
/usr/share/doc/ruby-test-unit-context/README.md