3 files changed, 12 insertions, 1 deletions
diff --git a/activemodel/test/cases/callbacks_test.rb b/activemodel/test/cases/callbacks_test.rb
index 85455c112c..e4ecc0adb4 100644
--- a/activemodel/test/cases/callbacks_test.rb
+++ b/activemodel/test/cases/callbacks_test.rb
@@ -28,7 +28,7 @@ class CallbacksTest < ActiveModel::TestCase
       false
     end
 
-    after_create "@callbacks << :final_callback"
+    ActiveSupport::Deprecation.silence { after_create "@callbacks << :final_callback" }
 
     def initialize(options = {})
       @callbacks = []
diff --git a/activemodel/test/cases/errors_test.rb b/activemodel/test/cases/errors_test.rb
index f6d171bec6..a5ac055033 100644
--- a/activemodel/test/cases/errors_test.rb
+++ b/activemodel/test/cases/errors_test.rb
@@ -410,4 +410,14 @@ class ErrorsTest < ActiveModel::TestCase
     person.errors.clear
     assert person.errors.details.empty?
   end
+
+  test "copy errors" do
+    errors = ActiveModel::Errors.new(Person.new)
+    errors.add(:name, :invalid)
+    person = Person.new
+    person.errors.copy!(errors)
+
+    assert_equal [:name], person.errors.messages.keys
+    assert_equal [:name], person.errors.details.keys
+  end
 end
diff --git a/activemodel/test/cases/validations/with_validation_test.rb b/activemodel/test/cases/validations/with_validation_test.rb
index 03c7943308..c73580138d 100644
--- a/activemodel/test/cases/validations/with_validation_test.rb
+++ b/activemodel/test/cases/validations/with_validation_test.rb
@@ -101,6 +101,7 @@ class ValidatesWithTest < ActiveModel::TestCase
     validator.expect(:new, validator, [{foo: :bar, if: "1 == 1", class: Topic}])
     validator.expect(:validate, nil, [topic])
     validator.expect(:is_a?, false, [Symbol])
+    validator.expect(:is_a?, false, [String])
 
     Topic.validates_with(validator, if: "1 == 1", foo: :bar)
     assert topic.valid?