diff --git a/lib/minitest-rails.rb b/lib/minitest-rails.rb
index 3db788a9..04dcb859 100644
--- a/lib/minitest-rails.rb
+++ b/lib/minitest-rails.rb
@@ -1,4 +1,5 @@
 require "rails"
+require "minitest/unit"
 
 module MiniTest
   module Rails