diff --git a/guides/source/testing.md b/guides/source/testing.md
index 540197e6e76df17916b8d19c253747b0928d8009..e2a8fe7f307552a6cce291233f858f72133ceb3c 100644
--- a/guides/source/testing.md
+++ b/guides/source/testing.md
@@ -977,5 +977,6 @@ The built-in `test/unit` based testing is not the only way to test Rails applica
 * [NullDB](http://avdi.org/projects/nulldb/), a way to speed up testing by avoiding database use.
 * [Factory Girl](https://github.com/thoughtbot/factory_girl/tree/master), a replacement for fixtures.
 * [Machinist](https://github.com/notahat/machinist/tree/master), another replacement for fixtures.
+* [MiniTest::Spec Rails](https://github.com/metaskills/minitest-spec-rails), use the MiniTest::Spec DSL within your rails tests.
 * [Shoulda](http://www.thoughtbot.com/projects/shoulda), an extension to `test/unit` with additional helpers, macros, and assertions.
 * [RSpec](http://relishapp.com/rspec), a behavior-driven development framework