diff --git a/Gemfile b/Gemfile
index 2ee6627530e..da7f501ed1c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,6 +6,7 @@ group :development, :test do
 
   gem "cancancan"
   gem "pundit"
+  gem "action_policy"
 
   gem "draper"
   gem "devise"
diff --git a/Gemfile.lock b/Gemfile.lock
index da0e1d251b3..19621350902 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,6 +14,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    action_policy (0.7.4)
+      ruby-next-core (>= 1.0)
     actioncable (8.0.2)
       actionpack (= 8.0.2)
       activesupport (= 8.0.2)
@@ -397,6 +399,7 @@ GEM
     rubocop-rspec (3.6.0)
       lint_roller (~> 1.1)
       rubocop (~> 1.72, >= 1.72.1)
+    ruby-next-core (1.1.1)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     securerandom (0.4.1)
@@ -453,6 +456,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  action_policy
   activeadmin!
   cancancan
   capybara
diff --git a/docs/13-authorization-adapter.md b/docs/13-authorization-adapter.md
index 326cb0a128f..2f7ed774867 100644
--- a/docs/13-authorization-adapter.md
+++ b/docs/13-authorization-adapter.md
@@ -283,3 +283,63 @@ in your application instead of default one generated by Pundit's
 
 In addition, there are [example policies](https://github.com/activeadmin/activeadmin/tree/master/spec/support/templates/policies/active_admin)
 for restricting access to ActiveAdmin's pages and comments.
+
+## Using the ActionPolicy Adapter
+
+Active Admin also provides an adapter out of the box for [ActionPolicy](https://github.com/palkan/action_policy).
+
+To use the ActionPolicy adapter, update the configuration in the Active Admin
+initializer:
+
+```ruby
+config.authorization_adapter = ActiveAdmin::ActionPolicyAdapter
+```
+
+Once that's done, Active Admin will pick up your ActionPolicy policies, and use
+them for authorization. For more information about setting up ActionPolicy, see
+[their documentation](https://actionpolicy.evilmartians.io/#/).
+
+You can specify a default policy class that will be used when ActionPolicy is unable
+to find a suitable policy:
+
+```ruby
+config.action_policy_default_policy = MyDefaultPolicy
+```
+
+If you wish to maintain a separate set of ActionPolicy policies for admin
+resources, you may set a namespace here that ActionPolicy will search
+within when looking for a resource's policy:
+
+```ruby
+config.action_policy_namespace = ActiveAdmin
+```
+
+Example policy with namespace and scope type:
+
+```ruby
+module ActiveAdmin
+  class UserPolicy < ApplicationPolicy
+    scope_for(:active_admin) do |relation|
+      user.administrator? ? relation : relation.none
+    end
+
+    def index? = user.administrator?
+
+    def show? = user.administrator?
+
+    def create? = user.administrator?
+
+    def update? = user.administrator?
+
+    def destroy? = user.administrator?
+  end
+end
+```
+
+If you want to use batch actions, ensure that `destroy_all?` method is defined
+in your policy class. You can use this [template
+policy](https://github.com/activeadmin/activeadmin/blob/master/spec/support/templates/policies/action_policy/application_policy.rb)
+in your application.
+
+In addition, there are [example policies](https://github.com/activeadmin/activeadmin/tree/master/spec/support/templates/policies/action_policy/active_admin)
+for restricting access to ActiveAdmin's pages and comments.
diff --git a/features/authorization_action_policy.feature b/features/authorization_action_policy.feature
new file mode 100644
index 00000000000..63fb1100b28
--- /dev/null
+++ b/features/authorization_action_policy.feature
@@ -0,0 +1,47 @@
+@authorization
+Feature: Authorizing Access using ActionPolicy
+
+  Background:
+    Given I am logged in
+    And 1 post exists
+    And a configuration of:
+    """
+    require 'action_policy'
+
+    ActiveAdmin.application.namespace(:admin).authorization_adapter = ActiveAdmin::ActionPolicyAdapter
+    ActiveAdmin.application.namespace(:admin).action_policy_namespace = :action_policy
+
+    ActiveAdmin.register Post do
+    end
+
+    ActiveAdmin.register_page "No Access" do
+    end
+    """
+    And I am on the index page for posts
+
+  Scenario: Attempt to access a resource I am not authorized to see
+    When I go to the last post's edit page
+    Then I should see "You are not authorized to perform this action"
+
+  Scenario: Viewing the default action items
+    When I follow "View"
+    Then I should not see an action item link to "Edit"
+
+  Scenario: Attempting to visit a Page without authorization
+    When I go to the admin no access page
+    Then I should see "You are not authorized to perform this action"
+
+  Scenario: Viewing a page with authorization
+    When I go to the admin dashboard page
+    Then I should see "Dashboard"
+
+  Scenario: Comment policy allows access to my own comments only
+    Given 5 comments added by admin with an email "commenter@example.com"
+    And 3 comments added by admin with an email "admin@example.com"
+    When I am on the dashboard
+    Then I should see a menu item for "Comments"
+    When I go to the index page for comments
+    Then I should see 3 Comments in the table
+    When I go to the last post's show page
+    Then I should see 3 comments
+    And I should be able to add a comment 
\ No newline at end of file
diff --git a/gemfiles/rails_70/Gemfile b/gemfiles/rails_70/Gemfile
index e40f0dda1b6..cccf89df1d1 100644
--- a/gemfiles/rails_70/Gemfile
+++ b/gemfiles/rails_70/Gemfile
@@ -6,6 +6,7 @@ group :development, :test do
 
   gem "cancancan"
   gem "pundit"
+  gem "action_policy"
 
   gem "draper"
   gem "devise"
diff --git a/gemfiles/rails_70/Gemfile.lock b/gemfiles/rails_70/Gemfile.lock
index 63ce6f544c6..db9f4a19260 100644
--- a/gemfiles/rails_70/Gemfile.lock
+++ b/gemfiles/rails_70/Gemfile.lock
@@ -14,6 +14,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    action_policy (0.7.4)
+      ruby-next-core (>= 1.0)
     actioncable (7.0.8.7)
       actionpack (= 7.0.8.7)
       activesupport (= 7.0.8.7)
@@ -236,7 +238,6 @@ GEM
     matrix (0.4.2)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.8)
     minitest (5.25.5)
     multi_test (1.1.0)
     net-imap (0.5.7)
@@ -249,9 +250,6 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.8)
-      mini_portile2 (~> 2.8.2)
-      racc (~> 1.4)
     nokogiri (1.18.8-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.18.8-x86_64-linux-gnu)
@@ -333,6 +331,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.2)
+    ruby-next-core (1.1.1)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     simplecov (0.22.0)
@@ -352,8 +351,6 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sqlite3 (1.7.3)
-      mini_portile2 (~> 2.8.0)
     sqlite3 (1.7.3-arm64-darwin)
     sqlite3 (1.7.3-x86_64-linux)
     sys-uname (1.3.1)
@@ -380,10 +377,10 @@ GEM
 
 PLATFORMS
   arm64-darwin
-  ruby
   x86_64-linux
 
 DEPENDENCIES
+  action_policy
   activeadmin!
   cancancan
   capybara
diff --git a/gemfiles/rails_71/Gemfile b/gemfiles/rails_71/Gemfile
index 8e94220e958..245cddc85ec 100644
--- a/gemfiles/rails_71/Gemfile
+++ b/gemfiles/rails_71/Gemfile
@@ -6,6 +6,7 @@ group :development, :test do
 
   gem "cancancan"
   gem "pundit"
+  gem "action_policy"
 
   gem "draper"
   gem "devise"
diff --git a/gemfiles/rails_71/Gemfile.lock b/gemfiles/rails_71/Gemfile.lock
index 72219d289be..f0f6d71aaa6 100644
--- a/gemfiles/rails_71/Gemfile.lock
+++ b/gemfiles/rails_71/Gemfile.lock
@@ -14,6 +14,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    action_policy (0.7.4)
+      ruby-next-core (>= 1.0)
     actioncable (7.1.5.1)
       actionpack (= 7.1.5.1)
       activesupport (= 7.1.5.1)
@@ -254,7 +256,6 @@ GEM
     marcel (1.0.4)
     matrix (0.4.2)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.8)
     minitest (5.25.5)
     multi_test (1.1.0)
     mutex_m (0.3.0)
@@ -268,9 +269,6 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.8)
-      mini_portile2 (~> 2.8.2)
-      racc (~> 1.4)
     nokogiri (1.18.8-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.18.8-x86_64-linux-gnu)
@@ -366,6 +364,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.2)
+    ruby-next-core (1.1.1)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     securerandom (0.4.1)
@@ -386,8 +385,6 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sqlite3 (2.6.0)
-      mini_portile2 (~> 2.8.0)
     sqlite3 (2.6.0-arm64-darwin)
     sqlite3 (2.6.0-x86_64-linux-gnu)
     stringio (3.1.7)
@@ -415,10 +412,10 @@ GEM
 
 PLATFORMS
   arm64-darwin
-  ruby
   x86_64-linux
 
 DEPENDENCIES
+  action_policy
   activeadmin!
   cancancan
   capybara
diff --git a/gemfiles/rails_72/Gemfile b/gemfiles/rails_72/Gemfile
index 242a1c316a1..586555ae1cf 100644
--- a/gemfiles/rails_72/Gemfile
+++ b/gemfiles/rails_72/Gemfile
@@ -6,6 +6,7 @@ group :development, :test do
 
   gem "cancancan"
   gem "pundit"
+  gem "action_policy"
 
   gem "draper"
   gem "devise"
diff --git a/gemfiles/rails_72/Gemfile.lock b/gemfiles/rails_72/Gemfile.lock
index d15e2ce8ac1..e5ac7e90924 100644
--- a/gemfiles/rails_72/Gemfile.lock
+++ b/gemfiles/rails_72/Gemfile.lock
@@ -14,6 +14,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    action_policy (0.7.4)
+      ruby-next-core (>= 1.0)
     actioncable (7.2.2.1)
       actionpack (= 7.2.2.1)
       activesupport (= 7.2.2.1)
@@ -248,7 +250,6 @@ GEM
     marcel (1.0.4)
     matrix (0.4.2)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.8)
     minitest (5.25.5)
     multi_test (1.1.0)
     net-imap (0.5.7)
@@ -261,9 +262,6 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.8)
-      mini_portile2 (~> 2.8.2)
-      racc (~> 1.4)
     nokogiri (1.18.8-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.18.8-x86_64-linux-gnu)
@@ -359,6 +357,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.2)
+    ruby-next-core (1.1.1)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     securerandom (0.4.1)
@@ -379,8 +378,6 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sqlite3 (2.6.0)
-      mini_portile2 (~> 2.8.0)
     sqlite3 (2.6.0-arm64-darwin)
     sqlite3 (2.6.0-x86_64-linux-gnu)
     stringio (3.1.7)
@@ -409,10 +406,10 @@ GEM
 
 PLATFORMS
   arm64-darwin
-  ruby
   x86_64-linux
 
 DEPENDENCIES
+  action_policy
   activeadmin!
   cancancan
   capybara
diff --git a/lib/active_admin.rb b/lib/active_admin.rb
index 148f34468e2..227067a4d20 100644
--- a/lib/active_admin.rb
+++ b/lib/active_admin.rb
@@ -24,6 +24,7 @@ module ActiveAdmin
   autoload :Callbacks, "active_admin/callbacks"
   autoload :Component, "active_admin/component"
   autoload :CanCanAdapter, "active_admin/cancan_adapter"
+  autoload :ActionPolicyAdapter, "active_admin/action_policy_adapter"
   autoload :ControllerAction, "active_admin/controller_action"
   autoload :CSVBuilder, "active_admin/csv_builder"
   autoload :Dependency, "active_admin/dependency"
diff --git a/lib/active_admin/action_policy_adapter.rb b/lib/active_admin/action_policy_adapter.rb
new file mode 100644
index 00000000000..ca84d000f28
--- /dev/null
+++ b/lib/active_admin/action_policy_adapter.rb
@@ -0,0 +1,83 @@
+ActiveAdmin::Dependency.action_policy!
+
+require "action_policy"
+
+# Add a setting to the application to configure the action policy default policy
+ActiveAdmin::Application.inheritable_setting :action_policy_default_policy, nil
+ActiveAdmin::Application.inheritable_setting :action_policy_namespace, nil
+ActiveAdmin::Application.inheritable_setting :action_policy_scope_type, :active_admin
+
+module ActiveAdmin
+  class ActionPolicyAdapter < AuthorizationAdapter
+    def authorized?(action, subject = nil)
+      action = format_action(action, subject)
+      retrieve_policy(subject).apply(action)
+    end
+
+    def scope_collection(collection, _action = Auth::READ)
+      retrieve_policy(collection).apply_scope(collection, type: default_scope_type)
+    end
+
+    def retrieve_policy(subject)
+      target = policy_target(subject)
+      @policies ||= {}
+      @policies[target] ||= ActionPolicy.lookup(target, namespace: default_policy_module)
+      @policies[target].new(target, user: user)
+    rescue ActionPolicy::NotFound
+      if default_policy_class
+        default_policy(subject)
+      else
+        raise ActionPolicy::NotFound, "unable to find a compatible policy for `#{target}`"
+      end
+    end
+
+    def format_action(action, subject)
+      case action
+      when Auth::READ then subject.is_a?(Class) ? :index? : :show?
+      when Auth::DESTROY then subject.is_a?(Class) ? :destroy_all? : :destroy?
+      else "#{action}?"
+      end
+    end
+
+    private
+
+    def default_policy
+      ActiveAdmin.application.action_policy_default_policy
+    end
+
+    def default_policy_class
+      return if default_policy.nil?
+
+      default_policy.to_s.camelize.constantize
+    end
+
+    def default_policy_namespace
+      ActiveAdmin.application.action_policy_namespace
+    end
+
+    def default_policy_module
+      return if default_policy_namespace.nil?
+
+      default_policy_namespace.to_s.camelize.constantize
+    end
+
+    def default_scope_type
+      ActiveAdmin.application.action_policy_scope_type&.to_sym
+    end
+
+    def policy_target(subject)
+      case subject
+      when nil then resource.resource_class
+      when Class then subject.new
+      else subject
+      end
+    end
+
+    def apply_namespace(subject)
+      return subject unless default_policy_namespace
+      return subject if subject.class.to_s.start_with?("#{default_policy_module}::")
+
+      [default_policy_namespace.to_sym, subject]
+    end
+  end
+end
diff --git a/lib/generators/active_admin/install/templates/active_admin.rb.erb b/lib/generators/active_admin/install/templates/active_admin.rb.erb
index 1432cfc4dbe..358bfd1d543 100644
--- a/lib/generators/active_admin/install/templates/active_admin.rb.erb
+++ b/lib/generators/active_admin/install/templates/active_admin.rb.erb
@@ -68,10 +68,11 @@ ActiveAdmin.setup do |config|
   # Active Admin will automatically call an authorization
   # method in a before filter of all controller actions to
   # ensure that there is a user with proper rights. You can use
-  # CanCanAdapter, PunditAdapter, or make your own. Please
+  # CanCanAdapter, PunditAdapter, ActionPolicyAdapter, or make your own. Please
   # refer to the documentation.
   # config.authorization_adapter = ActiveAdmin::CanCanAdapter
   # config.authorization_adapter = ActiveAdmin::PunditAdapter
+  # config.authorization_adapter = ActiveAdmin::ActionPolicyAdapter
 
   # In case you prefer Pundit over other solutions you can here pass
   # the name of default policy class. This policy will be used in every
@@ -83,6 +84,19 @@ ActiveAdmin.setup do |config|
   # within when looking for a resource's policy.
   # config.pundit_policy_namespace = :admin
 
+  # In case you prefer ActionPolicy over other solutions you can here pass
+  # the name of default policy class. This policy will be used in every
+  # case when ActionPolicy is unable to find suitable policy.
+  # config.action_policy_default_policy = "ActiveAdminDefaultPolicy"
+
+  # If you wish to maintain a separate set of ActionPolicy policies for admin
+  # resources, you may set a namespace here that ActionPolicy will search
+  # within when looking for a resource's policy.
+  # config.action_policy_namespace = "ActiveAdmin"
+
+  # If you wish to use a different scope type for ActionPolicy, you can set it here.
+  # config.action_policy_scope_type = :active_admin
+
   # You can customize your CanCan Ability class name here.
   # config.cancan_ability_class = "Ability"
 
diff --git a/spec/support/templates/policies/action_policy/active_admin/comment_policy.rb b/spec/support/templates/policies/action_policy/active_admin/comment_policy.rb
new file mode 100644
index 00000000000..30657a04d00
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/active_admin/comment_policy.rb
@@ -0,0 +1,9 @@
+module ActionPolicy::ActiveAdmin
+  class CommentPolicy < ActionPolicy::ApplicationPolicy
+    scope_for(:active_admin) do |relation|
+      relation.where(author: user)
+    end
+
+    def destroy? = author? || administrator?
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/active_admin/page_policy.rb b/spec/support/templates/policies/action_policy/active_admin/page_policy.rb
new file mode 100644
index 00000000000..30591e05152
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/active_admin/page_policy.rb
@@ -0,0 +1,12 @@
+module ActionPolicy::ActiveAdmin
+  class PagePolicy < ActionPolicy::ApplicationPolicy
+    def show?
+      case record.name
+      when "Dashboard"
+        true
+      else
+        false
+      end
+    end
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/active_admin/user_policy.rb b/spec/support/templates/policies/action_policy/active_admin/user_policy.rb
new file mode 100644
index 00000000000..178d16b8081
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/active_admin/user_policy.rb
@@ -0,0 +1,19 @@
+module ActionPolicy::ActiveAdmin
+  class UserPolicy < ActionPolicy::ApplicationPolicy
+    scope_for(:active_admin) do |relation|
+      administrator? ? relation : relation.none
+    end
+
+    def index? = administrator?
+
+    def show? = administrator?
+
+    def create? = administrator?
+
+    def update? = administrator?
+
+    def destroy? = administrator?
+
+    def destroy_all? = administrator?
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/admin_user_policy.rb b/spec/support/templates/policies/action_policy/admin_user_policy.rb
new file mode 100644
index 00000000000..020b45636fc
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/admin_user_policy.rb
@@ -0,0 +1,4 @@
+module ActionPolicy
+  class AdminUserPolicy < ActionPolicy::ApplicationPolicy
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/application_policy.rb b/spec/support/templates/policies/action_policy/application_policy.rb
new file mode 100644
index 00000000000..2182c07226c
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/application_policy.rb
@@ -0,0 +1,67 @@
+class ActionPolicy::ApplicationPolicy < ActionPolicy::Base
+  def initialize(record = nil, user:)
+    super
+    @user = user
+    @record = record
+  end
+
+  def index?
+    false
+  end
+
+  def show?
+    false
+  end
+
+  def new?
+    create?
+  end
+
+  def create?
+    false
+  end
+
+  def edit?
+    update?
+  end
+
+  def update?
+    false
+  end
+
+  def destroy?
+    false
+  end
+
+  def destroy_all?
+    false
+  end
+
+  private
+
+  def authenticated?
+    return false if user.blank?
+
+    true
+  end
+
+  def not_authenticated?
+    !authenticated?
+  end
+
+  def author?
+    authenticated? && record.try(:author) == user
+  end
+
+  def owner?
+    authenticated? && record.try(:owner) == user
+  end
+
+  def user_record?
+    authenticated? && record == user
+  end
+
+  def administrator?
+    authenticated? && user.try(:administrator?)
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/category_policy.rb b/spec/support/templates/policies/action_policy/category_policy.rb
new file mode 100644
index 00000000000..17df702131d
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/category_policy.rb
@@ -0,0 +1,4 @@
+module ActionPolicy
+  class CategoryPolicy < ActionPolicy::ApplicationPolicy
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/company_policy.rb b/spec/support/templates/policies/action_policy/company_policy.rb
new file mode 100644
index 00000000000..567a4eddb50
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/company_policy.rb
@@ -0,0 +1,4 @@
+module ActionPolicy
+  class CompanyPolicy < ActionPolicy::ApplicationPolicy
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/post_policy.rb b/spec/support/templates/policies/action_policy/post_policy.rb
new file mode 100644
index 00000000000..a877de0cd53
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/post_policy.rb
@@ -0,0 +1,9 @@
+module ActionPolicy
+  class PostPolicy < ActionPolicy::ApplicationPolicy
+    def new? = true
+  
+    def create? = record.category.nil? || record.category.name != "Announcements" || user.is_a?(User::VIP)
+  
+    def update? = author?
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/store_policy.rb b/spec/support/templates/policies/action_policy/store_policy.rb
new file mode 100644
index 00000000000..112605e2709
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/store_policy.rb
@@ -0,0 +1,4 @@
+module ActionPolicy
+  class StorePolicy < ActionPolicy::ApplicationPolicy
+  end
+end
diff --git a/spec/support/templates/policies/action_policy/tag_policy.rb b/spec/support/templates/policies/action_policy/tag_policy.rb
new file mode 100644
index 00000000000..d12cb518a50
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/tag_policy.rb
@@ -0,0 +1,5 @@
+module ActionPolicy
+  class TagPolicy < ActionPolicy::ApplicationPolicy
+  end
+end
+
diff --git a/spec/support/templates/policies/action_policy/user_policy.rb b/spec/support/templates/policies/action_policy/user_policy.rb
new file mode 100644
index 00000000000..e381b44057d
--- /dev/null
+++ b/spec/support/templates/policies/action_policy/user_policy.rb
@@ -0,0 +1,4 @@
+module ActionPolicy
+  class UserPolicy < ActionPolicy::ApplicationPolicy
+  end
+end
diff --git a/spec/unit/action_policy_adapter_spec.rb b/spec/unit/action_policy_adapter_spec.rb
new file mode 100644
index 00000000000..ad9815b2a8b
--- /dev/null
+++ b/spec/unit/action_policy_adapter_spec.rb
@@ -0,0 +1,74 @@
+# frozen_string_literal: true
+require "rails_helper"
+
+RSpec.describe ActiveAdmin::ActionPolicyAdapter do
+  describe "full integration" do
+    let(:application) { ActiveAdmin::Application.new }
+    let(:namespace) { ActiveAdmin::Namespace.new(application, "Admin") }
+    let(:resource) { namespace.register(Post) }
+    let(:user) { User.new }
+    let(:auth) { namespace.authorization_adapter.new(resource, user) }
+
+    before do
+      namespace.authorization_adapter = ActiveAdmin::ActionPolicyAdapter
+    end
+
+    it "should initialize the policy stored in the namespace configuration" do
+      expect(auth.authorized?(:read, Post)).to eq true
+      expect(auth.authorized?(:update, Post)).to eq false
+    end
+
+    it "should treat :new ability the same as :create" do
+      expect(auth.authorized?(:new, Post)).to eq true
+      expect(auth.authorized?(:create, Post)).to eq true
+    end
+
+    it "should scope the collection" do
+      collection = double
+      expect(collection).to receive(:accessible_by).with(auth.action_policy, :read)
+      auth.scope_collection(collection, :read)
+    end
+
+    context "when ActionPolicy namespace provided" do
+      before do
+        allow(ActiveAdmin.application).to receive(:action_policy_namespace).and_return :foobar
+      end
+
+      it "looks for a namespaced policy" do
+        expect(ActionPolicy).to receive(:lookup).with(Post).and_return(DefaultPolicy)
+        auth.authorized?(:read, Post)
+      end
+
+      it "looks for a namespaced policy scope" do
+        collection = double
+        expect(ActionPolicy).to receive(:lookup).with(collection).and_return(DefaultPolicy)
+        auth.scope_collection(collection, :read)
+      end
+
+      it "uses the resource when no subject given" do
+        expect(ActionPolicy).to receive(:lookup).with(resource).and_return(DefaultPolicy)
+        auth.authorized?(:index)
+      end
+    end
+
+    context "when ActionPolicy is unable to find policy" do
+      let(:record) { double }
+
+      subject(:policy) { auth.retrieve_policy(record) }
+
+      before do
+        allow(ActiveAdmin.application).to receive(:action_policy_default_policy).and_return "DefaultPolicy"
+      end
+
+      it("should return default policy instance") { is_expected.to be_instance_of(DefaultPolicy) }
+
+      context "and default policy doesn't exist" do
+        let(:default_policy_klass_name) { nil }
+
+        it "raises the error" do
+          expect { subject }.to raise_error ActionPolicy::NotFound
+        end
+      end
+    end
+  end
+end 
\ No newline at end of file