diff --git a/.gitignore b/.gitignore
index 46e7ea0f..1dd526e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@ config/initializers/secret_token.rb
 /test/dummy/log/*
 /test/dummy/tmp/*
 /test/dummy/db/*.sqlite3
+/test/tmp/*
 Gemfile.lock
 .tags
 gemfiles/.bundle
diff --git a/lib/tasks/godmin_tasks.rake b/lib/tasks/godmin_tasks.rake
deleted file mode 100644
index 28079c10..00000000
--- a/lib/tasks/godmin_tasks.rake
+++ /dev/null
@@ -1,4 +0,0 @@
-# desc "Explaining what the task does"
-# task :godmin do
-#   # Task goes here
-# end
diff --git a/test/fakes/article.rb b/test/fakes/article.rb
index c95f3bbb..a6b023d6 100644
--- a/test/fakes/article.rb
+++ b/test/fakes/article.rb
@@ -5,7 +5,7 @@ def self.table_name
     end
 
     def self.column_names
-      ["id", "title"]
+      %w[id title]
     end
   end
 end
diff --git a/test/fakes/article_service.rb b/test/fakes/article_service.rb
index 5f98b7eb..e596552a 100644
--- a/test/fakes/article_service.rb
+++ b/test/fakes/article_service.rb
@@ -13,8 +13,8 @@ class ArticleService
     scope :published
 
     filter :title
-    filter :country, as: :select, collection: %w(Sweden Canada)
-    filter :tags, as: :multiselect, collection: %w(Apple Banana)
+    filter :country, as: :select, collection: %w[Sweden Canada]
+    filter :tags, as: :multiselect, collection: %w[Apple Banana]
 
     batch_action :unpublish
     batch_action :publish, confirm: true, only: [:unpublished], except: [:published]
@@ -25,7 +25,7 @@ def initialize(*)
     end
 
     def resources_relation
-      [:foo, :bar, :baz]
+      %i[foo bar baz]
     end
 
     def order_by_foobar(resources, direction)
diff --git a/test/generators/resource_generator_test.rb b/test/generators/resource_generator_test.rb
new file mode 100644
index 00000000..7ec9b61f
--- /dev/null
+++ b/test/generators/resource_generator_test.rb
@@ -0,0 +1,77 @@
+require "test_helper"
+require "generators/godmin/resource/resource_generator"
+
+module Godmin
+  class ResourceGeneratorTest < ::Rails::Generators::TestCase
+    tests ResourceGenerator
+    destination File.expand_path("../../tmp", __FILE__)
+    setup :prepare_destination
+
+    def test_resource_generator_in_standalone_install
+      system "cd #{destination_root} && rails new . --skip-test --skip-spring --skip-bundle --skip-git --quiet"
+      system "cd #{destination_root} && bin/rails generate godmin:install --quiet"
+      system "cd #{destination_root} && bin/rails generate godmin:resource foo bar --quiet"
+
+      assert_file "config/routes.rb", /resources :foos/
+      assert_file "app/views/shared/_navigation.html.erb", /<%= navbar_item Foo %>/
+
+      assert_file "app/controllers/foos_controller.rb" do |content|
+        expected_content = <<-CONTENT.strip_heredoc
+          class FoosController < ApplicationController
+            include Godmin::Resources::ResourceController
+          end
+        CONTENT
+        assert_match expected_content, content
+      end
+
+      assert_file "app/services/foo_service.rb" do |content|
+        expected_content = <<-CONTENT.strip_heredoc
+          class FooService
+            include Godmin::Resources::ResourceService
+
+            attrs_for_index :bar
+            attrs_for_show :bar
+            attrs_for_form :bar
+          end
+        CONTENT
+        assert_match expected_content, content
+      end
+    end
+
+    def test_resource_generator_in_engine_install
+      system "cd #{destination_root} && rails new . --skip-test --skip-spring --skip-bundle --skip-git --quiet"
+      system "cd #{destination_root} && bin/rails plugin new fakemin --mountable --quiet"
+      system "cd #{destination_root} && fakemin/bin/rails generate godmin:install --quiet"
+      system "cd #{destination_root} && fakemin/bin/rails generate godmin:resource foo bar --quiet"
+
+      assert_file "fakemin/config/routes.rb", /resources :foos/
+      assert_file "fakemin/app/views/fakemin/shared/_navigation.html.erb", /<%= navbar_item Foo %>/
+
+      assert_file "fakemin/app/controllers/fakemin/foos_controller.rb" do |content|
+        expected_content = <<-CONTENT.strip_heredoc
+          module Fakemin
+            class FoosController < ApplicationController
+              include Godmin::Resources::ResourceController
+            end
+          end
+        CONTENT
+        assert_match expected_content, content
+      end
+
+      assert_file "fakemin/app/services/fakemin/foo_service.rb" do |content|
+        expected_content = <<-CONTENT.strip_heredoc
+          module Fakemin
+            class FooService
+              include Godmin::Resources::ResourceService
+
+              attrs_for_index :bar
+              attrs_for_show :bar
+              attrs_for_form :bar
+            end
+          end
+        CONTENT
+        assert_match expected_content, content
+      end
+    end
+  end
+end
diff --git a/test/unit/authorization/policy_finder_test.rb b/test/unit/authorization/policy_finder_test.rb
new file mode 100644
index 00000000..d97afcb2
--- /dev/null
+++ b/test/unit/authorization/policy_finder_test.rb
@@ -0,0 +1,55 @@
+require "test_helper"
+
+module Godmin
+  module Authorization
+    class PolicyFinderTest < ActiveSupport::TestCase
+      class Article; end
+      class ArticlePolicy; end
+
+      def test_find_by_model
+        klass = Class.new do
+          extend ActiveModel::Naming
+
+          def self.name
+            "Article"
+          end
+        end
+
+        policy = PolicyFinder.find(klass, Godmin::Authorization::PolicyFinderTest)
+        assert_equal ArticlePolicy, policy
+      end
+
+      def test_find_by_class
+        policy = PolicyFinder.find(Article)
+        assert_equal ArticlePolicy, policy
+      end
+
+      def test_find_by_symbol
+        policy = PolicyFinder.find(:article, Godmin::Authorization::PolicyFinderTest)
+        assert_equal ArticlePolicy, policy
+      end
+
+      def test_override_policy_class_on_class
+        klass = Class.new do
+          def self.policy_class
+            ArticlePolicy
+          end
+        end
+
+        policy = PolicyFinder.find(klass)
+        assert_equal ArticlePolicy, policy
+      end
+
+      def test_override_policy_class_on_instance
+        klass = Class.new do
+          def policy_class
+            ArticlePolicy
+          end
+        end
+
+        policy = PolicyFinder.find(klass.new)
+        assert_equal ArticlePolicy, policy
+      end
+    end
+  end
+end
diff --git a/test/lib/godmin/engine_wrapper_test.rb b/test/unit/engine_wrapper_test.rb
similarity index 100%
rename from test/lib/godmin/engine_wrapper_test.rb
rename to test/unit/engine_wrapper_test.rb
diff --git a/test/lib/godmin/helpers/filters_test.rb b/test/unit/helpers/filters_test.rb
similarity index 100%
rename from test/lib/godmin/helpers/filters_test.rb
rename to test/unit/helpers/filters_test.rb
diff --git a/test/lib/godmin/paginator_test.rb b/test/unit/paginator_test.rb
similarity index 100%
rename from test/lib/godmin/paginator_test.rb
rename to test/unit/paginator_test.rb
diff --git a/test/lib/godmin/resolver_test.rb b/test/unit/resolver_test.rb
similarity index 100%
rename from test/lib/godmin/resolver_test.rb
rename to test/unit/resolver_test.rb
diff --git a/test/lib/godmin/resources/resource_service/batch_actions_test.rb b/test/unit/resources/resource_service/batch_actions_test.rb
similarity index 100%
rename from test/lib/godmin/resources/resource_service/batch_actions_test.rb
rename to test/unit/resources/resource_service/batch_actions_test.rb
diff --git a/test/lib/godmin/resources/resource_service/filters_test.rb b/test/unit/resources/resource_service/filters_test.rb
similarity index 100%
rename from test/lib/godmin/resources/resource_service/filters_test.rb
rename to test/unit/resources/resource_service/filters_test.rb
diff --git a/test/lib/godmin/resources/resource_service/ordering_test.rb b/test/unit/resources/resource_service/ordering_test.rb
similarity index 100%
rename from test/lib/godmin/resources/resource_service/ordering_test.rb
rename to test/unit/resources/resource_service/ordering_test.rb
diff --git a/test/lib/godmin/resources/resource_service/pagination_test.rb b/test/unit/resources/resource_service/pagination_test.rb
similarity index 100%
rename from test/lib/godmin/resources/resource_service/pagination_test.rb
rename to test/unit/resources/resource_service/pagination_test.rb
diff --git a/test/lib/godmin/resources/resource_service/scopes_test.rb b/test/unit/resources/resource_service/scopes_test.rb
similarity index 100%
rename from test/lib/godmin/resources/resource_service/scopes_test.rb
rename to test/unit/resources/resource_service/scopes_test.rb
diff --git a/test/lib/godmin/resources/resource_service_test.rb b/test/unit/resources/resource_service_test.rb
similarity index 100%
rename from test/lib/godmin/resources/resource_service_test.rb
rename to test/unit/resources/resource_service_test.rb