diff --git a/README.md b/README.md
index a1f5022..5806b9f 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
     <a href="https://github.com/yii2-extensions/asset-bootstrap5" target="_blank">
         <img src="https://www.yiiframework.com/image/yii_logo_light.svg" height="100px;">
     </a>
-    <h1 align="center">Asset for Twitter Bootstrap 5.</h1>
+    <h1 align="center">Asset bundle for Twitter Bootstrap 5.</h1>
     <br>
 </p>
 
@@ -42,7 +42,7 @@ or add
 
 to the require-dev section of your `composer.json` file. 
 
-## Usage
+## Basic usage
 
 ```php
 <?php
@@ -59,39 +59,21 @@ BootstrapAsset::register($this);
 
 declare(strict_types=1);
 
-use Yii2\Asset\BootstrapCdnAsset;
-
-BootstrapCdnAsset::register($this);
-```
-
-```php
-<?php
-
-declare(strict_types=1);
-
 use Yii2\Asset\BootstrapPluginAsset;
 
 BootstrapPluginAsset::register($this);
 ```
 
-```php
-<?php
-
-declare(strict_types=1);
-
-use Yii2\Asset\BootstrapPluginCdnAsset;
-
-BootstrapPluginCdnAsset::register($this);
-```
+## CDN usage
 
 ```php
 <?php
 
 declare(strict_types=1);
 
-use Yii2\Asset\PopperAsset;
+use Yii2\Asset\BootstrapCdnAsset;
 
-PopperAsset::register($this);
+BootstrapCdnAsset::register($this);
 ```
 
 ```php
@@ -99,9 +81,9 @@ PopperAsset::register($this);
 
 declare(strict_types=1);
 
-use Yii2\Asset\PopperCdnAsset;
+use Yii2\Asset\BootstrapPluginCdnAsset;
 
-PopperCdnAsset::register($this);
+BootstrapPluginCdnAsset::register($this);
 ```
 
 ## Quality code
diff --git a/phpstan.neon b/phpstan.neon
index 1ed8f8c..25437e8 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,8 +1,9 @@
 includes:
 	- vendor/yii2-extensions/phpstan/extension.neon
+
 parameters:
     bootstrapFiles:
-        - tests/bootstrap.php
+        - tests/Support/bootstrap.php
 
     dynamicConstantNames:
         - YII_ENV
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index e95d41e..e7be864 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -2,7 +2,7 @@
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.2/phpunit.xsd"
-    bootstrap="tests/bootstrap.php"
+    bootstrap="tests/Support/bootstrap.php"
     cacheDirectory=".phpunit.cache"
     colors="true"
     executionOrder="depends,defects"
diff --git a/src/PopperAsset.php b/src/PopperAsset.php
deleted file mode 100644
index 0adecab..0000000
--- a/src/PopperAsset.php
+++ /dev/null
@@ -1,29 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Yii2\Asset;
-
-use yii\web\AssetBundle;
-
-/**
- * Popper JavaScript bundle.
- */
-final class PopperAsset extends AssetBundle
-{
-    /**
-     * @inheritDoc
-     */
-    public $sourcePath = '@npm/popperjs--core/dist/umd';
-
-    public function init(): void
-    {
-        parent::init();
-
-        $assetPopper = YII_ENV === 'prod' ? ['popper.min.js'] : ['popper.js'];
-        $assetPopperMap = YII_ENV === 'prod' ? ['popper.min.js.map'] : ['popper.js.map'];
-
-        $this->css = $assetPopper;
-        $this->publishOptions['only'] = array_merge($assetPopper, $assetPopperMap);
-    }
-}
diff --git a/src/PopperCdnAsset.php b/src/PopperCdnAsset.php
deleted file mode 100644
index fa02f1e..0000000
--- a/src/PopperCdnAsset.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Yii2\Asset;
-
-use yii\web\AssetBundle;
-
-/**
- * Popper CDN JavaScript bundle.
- */
-final class PopperCdnAsset extends AssetBundle
-{
-    /**
-     * @inheritDoc
-     *
-     * @phpstan-var array<array-key, mixed>
-     */
-    public $js = [
-        'https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js',
-    ];
-
-    /**
-     * @inheritDoc
-     *
-     * @phpstan-var array<array-key, mixed>
-     */
-    public $jsOptions = [
-        'crossorigin' => 'anonymous',
-        'integrity' => 'sha384-I7E8VVD/ismYTF4hNIPjVp/Zjvgyol6VFvRkX/vR+Vc4jQkC+hVqc2pM8ODewa9r',
-    ];
-}
diff --git a/tests/AssetTest.php b/tests/AssetTest.php
index ae6efdd..d5f5b90 100644
--- a/tests/AssetTest.php
+++ b/tests/AssetTest.php
@@ -9,8 +9,6 @@
 use Yii2\Asset\BootstrapCdnAsset;
 use Yii2\Asset\BootstrapPluginAsset;
 use Yii2\Asset\BootstrapPluginCdnAsset;
-use Yii2\Asset\PopperAsset;
-use Yii2\Asset\PopperCdnAsset;
 use yii\web\AssetBundle;
 use yii\web\View;
 
@@ -150,65 +148,4 @@ public function testBootstrapPluginCdnAssetRegister(): void
             $result,
         );
     }
-
-    public function testPopperAssetSimpleDependency(): void
-    {
-        $view = Yii::$app->getView();
-
-        $this->assertEmpty($view->assetBundles);
-
-        PopperAsset::register($view);
-
-        $this->assertCount(1, $view->assetBundles);
-        $this->assertArrayHasKey(PopperAsset::class, $view->assetBundles);
-    }
-
-    public function testPopperAssetRegister(): void
-    {
-        $view = new View();
-
-        $this->assertEmpty($view->assetBundles);
-
-        PopperAsset::register($view);
-
-        $this->assertCount(1, $view->assetBundles);
-        $this->assertInstanceOf(AssetBundle::class, $view->assetBundles[PopperAsset::class]);
-
-        $result = $view->renderFile(__DIR__ . '/Support/main.php');
-
-        $this->assertStringContainsString('popper.js', $result);
-    }
-
-    public function testPopperCdnAssetSimpleDependency(): void
-    {
-        $view = Yii::$app->getView();
-
-        $this->assertEmpty($view->assetBundles);
-
-        PopperCdnAsset::register($view);
-
-        $this->assertCount(1, $view->assetBundles);
-        $this->assertArrayHasKey(PopperCdnAsset::class, $view->assetBundles);
-    }
-
-    public function testPopperCdnAssetRegister(): void
-    {
-        $view = new View();
-
-        $this->assertEmpty($view->assetBundles);
-
-        PopperCdnAsset::register($view);
-
-        $this->assertCount(1, $view->assetBundles);
-        $this->assertInstanceOf(AssetBundle::class, $view->assetBundles[PopperCdnAsset::class]);
-
-        $result = $view->renderFile(__DIR__ . '/Support/main.php');
-
-        $this->assertStringContainsString(
-            <<<HTML
-            <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js" crossorigin="anonymous" integrity="sha384-I7E8VVD/ismYTF4hNIPjVp/Zjvgyol6VFvRkX/vR+Vc4jQkC+hVqc2pM8ODewa9r"></script>
-            HTML,
-            $result,
-        );
-    }
 }
diff --git a/tests/bootstrap.php b/tests/Support/bootstrap.php
similarity index 64%
rename from tests/bootstrap.php
rename to tests/Support/bootstrap.php
index ed7d498..192133b 100644
--- a/tests/bootstrap.php
+++ b/tests/Support/bootstrap.php
@@ -4,8 +4,9 @@
 
 define('YII_ENV', 'test');
 
-$autoload = dirname(__DIR__) . '/vendor/autoload.php';
-$yii2 = dirname(__DIR__) . '/vendor/yiisoft/yii2/Yii.php';
+$root = dirname(__DIR__, 2);
+$autoload = $root . '/vendor/autoload.php';
+$yii2 = $root . '/vendor/yiisoft/yii2/Yii.php';
 
 if (!is_file($autoload)) {
     die('You need to set up the project dependencies using Composer');
@@ -17,5 +18,3 @@
 
 require_once $autoload;
 require_once $yii2;
-
-Yii::setAlias('@root', dirname(__DIR__));