diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 3e067314d67593094a5a171071669463ea5d0ece..e5bb5538550b12564366ddaab827fc7e972c3904 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -396,7 +396,7 @@ def walk_permitted(params)
       params = ActionController::Parameters.new(crab: "Senjougahara Hitagi")
 
       assert params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
-      assert_not @params.to_h.is_a? ActionController::Parameters
+      assert_not params.to_h.is_a? ActionController::Parameters
       assert_equal({ "crab" => "Senjougahara Hitagi" }, params.to_h)
     ensure
       ActionController::Parameters.permit_all_parameters = false