1 files changed, 8 insertions, 2 deletions
diff --git a/activemodel/test/cases/forbidden_attributes_protection_test.rb b/activemodel/test/cases/forbidden_attributes_protection_test.rb
index 3cb204a2c5..d8d757f52a 100644
--- a/activemodel/test/cases/forbidden_attributes_protection_test.rb
+++ b/activemodel/test/cases/forbidden_attributes_protection_test.rb
@@ -2,12 +2,14 @@ require 'cases/helper'
 require 'active_support/core_ext/hash/indifferent_access'
 require 'models/account'
 
-class ProtectedParams < ActiveSupport::HashWithIndifferentAccess
+class ProtectedParams
   attr_accessor :permitted
   alias :permitted? :permitted
 
+  delegate :keys, :key?, :has_key?, :empty?, to: :@parameters
+
   def initialize(attributes)
-    super(attributes)
+    @parameters = attributes
     @permitted = false
   end
 
@@ -15,6 +17,10 @@ class ProtectedParams < ActiveSupport::HashWithIndifferentAccess
     @permitted = true
     self
   end
+
+  def to_h
+    @parameters
+  end
 end
 
 class ActiveModelMassUpdateProtectionTest < ActiveSupport::TestCase