diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec3072bb..2905b7d1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 * Test against Rails 7.2 [#921][].
+* Change return codes to new Responders defaults [#918][].
 
 ## Version 1.14.0
 
@@ -229,4 +230,5 @@ _No changes_.
 * First release. Support to I18n, singleton controllers, polymorphic controllers, belongs_to, nested_belongs_to and url helpers.
 
 [#873]: https://github.com/activeadmin/inherited_resources/pull/873
+[#918]: https://github.com/activeadmin/inherited_resources/pull/918
 [#921]: https://github.com/activeadmin/inherited_resources/pull/921
diff --git a/lib/inherited_resources/responder.rb b/lib/inherited_resources/responder.rb
index 19a559e0..44a65827 100644
--- a/lib/inherited_resources/responder.rb
+++ b/lib/inherited_resources/responder.rb
@@ -3,5 +3,8 @@
 module InheritedResources
   class Responder < ActionController::Responder
     include Responders::FlashResponder
+
+    self.error_status = :unprocessable_entity
+    self.redirect_status = :see_other
   end
 end
diff --git a/test/aliases_test.rb b/test/aliases_test.rb
index 8dda29a2..4665fdce 100644
--- a/test/aliases_test.rb
+++ b/test/aliases_test.rb
@@ -107,7 +107,7 @@ def test_dumb_responder_quietly_receives_everything_on_failure
     @controller.stubs(:resource_url).returns('http://test.host/')
     post :create
 
-    assert_response :success
+    assert_response :unprocessable_entity
     assert_equal "New HTML", @response.body.strip
   end
 
@@ -117,7 +117,7 @@ def test_html_is_the_default_when_only_xml_is_overwritten
     @controller.stubs(:resource_url).returns('http://test.host/')
     post :create
 
-    assert_response :success
+    assert_response :unprocessable_entity
     assert_equal "New HTML", @response.body.strip
   end
 
diff --git a/test/base_test.rb b/test/base_test.rb
index c4a59642..14d3f8f8 100644
--- a/test/base_test.rb
+++ b/test/base_test.rb
@@ -246,7 +246,7 @@ def test_render_new_template_when_user_cannot_be_saved
     User.stubs(:new).returns(mock_user(save: false, errors: {some: :error}))
     post :create
 
-    assert_response :success
+    assert_response :unprocessable_entity
     assert_equal "New HTML", @response.body.strip
   end
 
@@ -322,7 +322,7 @@ def test_render_edit_template_when_user_cannot_be_saved
     User.stubs(:find).returns(mock_user(update: false, errors: {some: :error}))
     put :update, params: { id: '42' }
 
-    assert_response :success
+    assert_response :unprocessable_entity
     assert_equal "Edit HTML", @response.body.strip
   end
 
@@ -370,6 +370,7 @@ def test_show_flash_message_with_javascript_request_when_user_cannot_be_deleted
     User.stubs(:find).returns(mock_user(destroy: false, errors: { fail: true }))
     delete :destroy, params: { id: '42' }, format: :js
 
+    assert_response :unprocessable_entity
     assert_equal 'User could not be destroyed.', flash[:alert]
   end
 
@@ -378,6 +379,7 @@ def test_redirects_to_users_list
     @controller.expects(:collection_url).returns('http://test.host/')
     delete :destroy, params: { id: '42' }
 
+    assert_response :see_other
     assert_redirected_to 'http://test.host/'
   end
 
@@ -386,6 +388,7 @@ def test_redirects_to_the_resource_if_cannot_be_destroyed
     @controller.expects(:collection_url).returns('http://test.host/')
     delete :destroy, params: { id: '42' }
 
+    assert_response :see_other
     assert_redirected_to 'http://test.host/'
   end
 end
diff --git a/test/customized_base_test.rb b/test/customized_base_test.rb
index 5a43f034..a608ada8 100644
--- a/test/customized_base_test.rb
+++ b/test/customized_base_test.rb
@@ -141,7 +141,7 @@ def test_render_new_template_when_user_cannot_be_saved
     Car.stubs(:create_new).returns(mock_car(save_successfully: false, errors: {some: :error}))
     post :create
 
-    assert_response :success
+    assert_response :unprocessable_entity
     assert_equal "New HTML", @response.body.strip
   end
 end
@@ -169,7 +169,7 @@ def test_render_edit_template_when_user_cannot_be_saved
     Car.stubs(:get).returns(mock_car(update_successfully: false, errors: {some: :error}))
     put :update, params: { id: '42' }
 
-    assert_response :success
+    assert_response :unprocessable_entity
     assert_equal "Edit HTML", @response.body.strip
   end
 end