diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index e02fe202e12db..75ea6523f7d18 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -167,6 +167,7 @@ def recycle!
       @formats = nil
       @env.delete_if { |k, v| k =~ /^(action_dispatch|rack)\.request/ }
       @env.delete_if { |k, v| k =~ /^action_dispatch\.rescue/ }
+      @symbolized_path_params = nil
       @method = @request_method = nil
       @fullpath = @ip = @remote_ip = nil
       @env['action_dispatch.request.query_parameters'] = {}
diff --git a/actionpack/lib/action_dispatch/http/parameters.rb b/actionpack/lib/action_dispatch/http/parameters.rb
index 5e1a2405f769e..ef5d207b26b82 100644
--- a/actionpack/lib/action_dispatch/http/parameters.rb
+++ b/actionpack/lib/action_dispatch/http/parameters.rb
@@ -15,14 +15,14 @@ def parameters
       alias :params :parameters
 
       def path_parameters=(parameters) #:nodoc:
-        @_symbolized_path_params = nil
+        @symbolized_path_params = nil
         @env.delete("action_dispatch.request.parameters")
         @env["action_dispatch.request.path_parameters"] = parameters
       end
 
       # The same as <tt>path_parameters</tt> with explicitly symbolized keys.
       def symbolized_path_parameters
-        @_symbolized_path_params ||= path_parameters.symbolize_keys
+        @symbolized_path_params ||= path_parameters.symbolize_keys
       end
 
       # Returns a hash with the \parameters used to form the \path of the request.
diff --git a/actionpack/test/controller/test_test.rb b/actionpack/test/controller/test_test.rb
index de2cab3e79526..e959b412197b8 100644
--- a/actionpack/test/controller/test_test.rb
+++ b/actionpack/test/controller/test_test.rb
@@ -549,6 +549,14 @@ def test_params_reset_after_post_request
     assert_blank @request.params[:foo]
   end
 
+  def test_symbolized_path_params_reset_after_request
+    get :test_params, :id => "foo"
+    assert_equal "foo", @request.symbolized_path_parameters[:id]
+    @request.recycle!
+    get :test_params
+    assert_nil @request.symbolized_path_parameters[:id]
+  end
+
   def test_should_have_knowledge_of_client_side_cookie_state_even_if_they_are_not_set
     @request.cookies['foo'] = 'bar'
     get :no_op