/usr/lib/ruby/vendor_ruby/active_support/testing/ is in ruby-activesupport-3.2 3.2.16-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/active_support/testing/assertions.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/declarative.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/deprecation.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/isolation.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/mochaing.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/pending.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/
/usr/lib/ruby/vendor_ruby/active_support/testing/performance.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/jruby.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/rubinius.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/ruby/
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/ruby.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/ruby/mri.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/performance/ruby/yarv.rb
/usr/lib/ruby/vendor_ruby/active_support/testing/setup_and_teardown.rb