/usr/lib/ruby/vendor_ruby/merb-core/test/ is in ruby-merb-core 1.1.3+dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/controller_helper.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/cookie_jar.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/mock_request_helper.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/multipart_request_helper.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/request_helper.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/route_helper.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/helpers/webrat_helper.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/matchers/
/usr/lib/ruby/vendor_ruby/merb-core/test/matchers.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/matchers/controller_matchers.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/matchers/request_matchers.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/matchers/route_matchers.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/run_spec.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/run_specs.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/tasks/
/usr/lib/ruby/vendor_ruby/merb-core/test/tasks/spectasks.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/test_ext/
/usr/lib/ruby/vendor_ruby/merb-core/test/test_ext/hpricot.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/test_ext/object.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/test_ext/rspec.rb
/usr/lib/ruby/vendor_ruby/merb-core/test/test_ext/string.rb