diff --git a/actionpack/lib/action_controller/integration.rb b/actionpack/lib/action_controller/integration.rb
index a7736de113ae6e909c3381527bd689ad18af4833..e9d57ad286b1e149b98704ffe2703bbadd4882da 100644
--- a/actionpack/lib/action_controller/integration.rb
+++ b/actionpack/lib/action_controller/integration.rb
@@ -13,6 +13,7 @@ module Integration #:nodoc:
     # Typically, you will instantiate a new session using IntegrationTest#open_session,
     # rather than instantiating Integration::Session directly.
     class Session
+      include Test::Unit::Assertions
       include ActionController::Assertions
       include ActionController::TestProcess