diff --git a/lib/webrat/core/session.rb b/lib/webrat/core/session.rb
index bace5b5..e194df8 100644
--- a/lib/webrat/core/session.rb
+++ b/lib/webrat/core/session.rb
@@ -12,6 +12,10 @@ module Webrat
   class InfiniteRedirectError < WebratError
   end
 
+  def self.session_class
+    Session
+  end
+
   def self.adapter_class
     case Webrat.configuration.mode
     when :rails