diff --git a/README.md b/README.md
index 51d1d900..a4804de8 100644
--- a/README.md
+++ b/README.md
@@ -418,6 +418,8 @@ RSpec.configure do |config|
 end
 ```
 
+Just be sure that this inclusion is made *after* the `require 'rspec/rails'` directive.
+
 Now you are ready to use the `sign_in` and `sign_out` methods. Such methods have the same signature as in controllers:
 
 ```ruby
@@ -439,6 +441,10 @@ There are two things that are important to keep in mind:
     get :new
     ```
 
+You can read more about testing your Rails 3 - Rails 4 controllers with RSpec in the wiki:
+
+* https://github.com/plataformatec/devise/wiki/How-To:-Test-controllers-with-Rails-3-and-4-%28and-RSpec%29
+
 ### OmniAuth
 
 Devise comes with OmniAuth support out of the box to authenticate with other providers. To use it, simply specify your OmniAuth configuration in `config/initializers/devise.rb`: