Guides: better example to find the last sent email

railties/guides/source/testing.textile

@@ -927,7 +927,7 @@ class UserControllerTest < ActionController::TestCase
     assert_difference 'ActionMailer::Base.deliveries.size', +1 do
       post :invite_friend, :email => 'friend@example.com'
     end
-    invite_email = ActionMailer::Base.deliveries.first
+    invite_email = ActionMailer::Base.deliveries.last
 
     assert_equal "You have been invited by me@example.com", invite_email.subject
     assert_equal 'friend@example.com', invite_email.to[0]