diff --git a/activejob/test/support/queue_classic/inline.rb b/activejob/test/support/queue_classic/inline.rb
index ca3cd4581b8..0695a34c278 100644
--- a/activejob/test/support/queue_classic/inline.rb
+++ b/activejob/test/support/queue_classic/inline.rb
@@ -1,22 +1,23 @@
 # frozen_string_literal: true
 
 require "queue_classic"
+require "active_support/core_ext/module/redefine_method"
 
 module QC
   class Queue
-    def enqueue(method, *args)
+    redefine_method(:enqueue) do |method, *args|
       receiver_str, _, message = method.rpartition(".")
       receiver = eval(receiver_str)
       receiver.send(message, *args)
     end
 
-    def enqueue_in(seconds, method, *args)
+    redefine_method(:enqueue_in) do |seconds, method, *args|
       receiver_str, _, message = method.rpartition(".")
       receiver = eval(receiver_str)
       receiver.send(message, *args)
     end
 
-    def enqueue_at(not_before, method, *args)
+    redefine_method(:enqueue_at) do |not_before, method, *args|
       receiver_str, _, message = method.rpartition(".")
       receiver = eval(receiver_str)
       receiver.send(message, *args)
diff --git a/activejob/test/support/sneakers/inline.rb b/activejob/test/support/sneakers/inline.rb
index 92b69ee3bcf..e772c68c6e2 100644
--- a/activejob/test/support/sneakers/inline.rb
+++ b/activejob/test/support/sneakers/inline.rb
@@ -1,11 +1,12 @@
 # frozen_string_literal: true
 
 require "sneakers"
+require "active_support/core_ext/module/redefine_method"
 
 module Sneakers
   module Worker
     module ClassMethods
-      def enqueue(msg)
+      redefine_method(:enqueue) do |msg|
         worker = new(nil, nil, {})
         worker.work(*msg)
       end
diff --git a/activemodel/test/models/visitor.rb b/activemodel/test/models/visitor.rb
index 9da004ffcc1..96bf3ef10aa 100644
--- a/activemodel/test/models/visitor.rb
+++ b/activemodel/test/models/visitor.rb
@@ -8,5 +8,6 @@ class Visitor
 
   has_secure_password(validations: false)
 
-  attr_accessor :password_digest, :password_confirmation
+  attr_accessor :password_digest
+  attr_reader :password_confirmation
 end