diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index d902adaff1..64159fa8e7 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -65,12 +65,7 @@ module ActionDispatch
       end
     end
 
-    class AbstractStore < Rack::Session::Abstract::ID
-      include Compatibility
-      include StaleSessionCheck
-
-      private
-
+    module SessionObject # :nodoc:
       def prepare_session(env)
         Request::Session.create(self, env, @default_options)
       end
@@ -78,6 +73,14 @@ module ActionDispatch
       def loaded_session?(session)
         !session.is_a?(Request::Session) || session.loaded?
       end
+    end
+
+    class AbstractStore < Rack::Session::Abstract::ID
+      include Compatibility
+      include StaleSessionCheck
+      include SessionObject
+
+      private
 
       def set_cookie(env, session_id, cookie)
         request = ActionDispatch::Request.new(env)
diff --git a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
index 8d673dd95e..dbcf703ec3 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
@@ -43,17 +43,10 @@ module ActionDispatch
     class CookieStore < Rack::Session::Cookie
       include Compatibility
       include StaleSessionCheck
+      include SessionObject
 
       private
 
-      def prepare_session(env)
-        Request::Session.create(self, env, @default_options)
-      end
-
-      def loaded_session?(session)
-        !session.is_a?(Request::Session) || session.loaded?
-      end
-
       def unpacked_cookie_data(env)
         env["action_dispatch.request.unsigned_session_cookie"] ||= begin
           stale_session_check! do
diff --git a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
index c51cbddfb5..38a737cd2b 100644
--- a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
@@ -6,22 +6,13 @@ module ActionDispatch
     class MemCacheStore < Rack::Session::Memcache
       include Compatibility
       include StaleSessionCheck
+      include SessionObject
 
       def initialize(app, options = {})
         require 'memcache'
         options[:expire_after] ||= options[:expires]
         super
       end
-
-      private
-
-      def prepare_session(env)
-        Request::Session.create(self, env, @default_options)
-      end
-
-      def loaded_session?(session)
-        !session.is_a?(Request::Session) || session.loaded?
-      end
     end
   end
 end