diff --git a/tests/Facades/StorageTest.php b/tests/Facades/StorageTest.php
index 6b52c8e..30819b3 100644
--- a/tests/Facades/StorageTest.php
+++ b/tests/Facades/StorageTest.php
@@ -281,8 +281,39 @@ public function testFilesystemFunction()
         $this->assertTrue(Storage::deleteDirectory($path));
     }
 
+    public function testExtend()
+    {
+        $map = array_filter([
+            'qiniu' => \Overtrue\Flysystem\Qiniu\QiniuAdapter::class,
+            'cos' => \Overtrue\Flysystem\Cos\CosAdapter::class,
+            'oss' => VersionHelper::isGteLaravel9() ? \AlphaSnow\Flysystem\Aliyun\AliyunAdapter::class : \AlphaSnow\AliyunOss\Adapter::class,
+            'oss2' =>
+                $this->isVersionOverPhp82()
+                    ? null // 目前不支持 php8.2，因为使用到了 ${var} 写法
+                    : \Iidestiny\Flysystem\Oss\OssAdapter::class,
+        ]);
+
+        foreach ($map as $name => $instance) {
+            $disk = Storage::disk($name);
+            $this->assertInstanceOf(Filesystem::class, $disk);
+            $this->assertInstanceOf($instance, $this->getAdapter($disk));
+        }
+    }
+
     protected function normalizePath(string $path)
     {
         return str_replace('\\', '/', $path);
     }
+
+    protected function getAdapter(Filesystem $disk)
+    {
+        return VersionHelper::isGteLaravel9()
+            ? $disk->getAdapter()
+            : $disk->getDriver()->getAdapter();
+    }
+
+    protected function isVersionOverPhp82()
+    {
+        return version_compare(phpversion(), '8.2', '>=');
+    }
 }
diff --git a/tests/config/plugin/webman-tech/laravel-filesystem/filesystems.php b/tests/config/plugin/webman-tech/laravel-filesystem/filesystems.php
index f238be4..25c1dd2 100644
--- a/tests/config/plugin/webman-tech/laravel-filesystem/filesystems.php
+++ b/tests/config/plugin/webman-tech/laravel-filesystem/filesystems.php
@@ -1,5 +1,12 @@
 <?php
 
+if (!function_exists('get_env')) {
+    function get_env(string $key, $default = null)
+    {
+        return $_ENV[$key] ?? $default;
+    }
+}
+
 return [
     'default' => 'local',
     'disks' => [
@@ -11,19 +18,19 @@
         'public' => [
             'driver' => 'local',
             'root' => storage_path() . '/app/public',
-            'url' => getenv('APP_URL') . '/storage',
+            'url' => get_env('APP_URL') . '/storage',
             'visibility' => 'public',
             'throw' => false,
         ],
         's3' => [
             'driver' => 's3',
-            'key' => getenv('AWS_ACCESS_KEY_ID'),
-            'secret' => getenv('AWS_SECRET_ACCESS_KEY'),
-            'region' => getenv('AWS_DEFAULT_REGION'),
-            'bucket' => getenv('AWS_BUCKET'),
-            'url' => getenv('AWS_URL'),
-            'endpoint' => getenv('AWS_ENDPOINT'),
-            'use_path_style_endpoint' => getenv('AWS_USE_PATH_STYLE_ENDPOINT', false),
+            'key' => get_env('AWS_ACCESS_KEY_ID'),
+            'secret' => get_env('AWS_SECRET_ACCESS_KEY'),
+            'region' => get_env('AWS_DEFAULT_REGION'),
+            'bucket' => get_env('AWS_BUCKET'),
+            'url' => get_env('AWS_URL'),
+            'endpoint' => get_env('AWS_ENDPOINT'),
+            'use_path_style_endpoint' => get_env('AWS_USE_PATH_STYLE_ENDPOINT', false),
             'throw' => false,
         ],
         // add cloud
@@ -31,7 +38,94 @@
             'driver' => 'local',
             'root' => storage_path() . '/app',
             'throw' => false,
-        ]
+        ],
+        // add extend test
+        'qiniu' => [
+            // 配置与使用：https://github.com/overtrue/laravel-filesystem-qiniu
+            'driver' => \WebmanTech\LaravelFilesystem\Extend\QiNiuOvertrueExtend::class,
+            'access_key' => get_env('QINIU_ACCESS_KEY', 'xxxxxxxxxxxxxxxx'),
+            'secret_key' => get_env('QINIU_SECRET_KEY', 'xxxxxxxxxxxxxxxx'),
+            'bucket' => get_env('QINIU_BUCKET', 'test'),
+            'domain' => get_env('QINIU_DOMAIN', 'xxx.clouddn.com'), // or host: https://xxxx.clouddn.com
+        ],
+        'cos' => [
+            // 配置与使用：https://github.com/overtrue/laravel-filesystem-cos
+            'driver' => \WebmanTech\LaravelFilesystem\Extend\CosOvertrueExtend::class,
+            'app_id' => get_env('COS_APP_ID'),
+            'secret_id' => get_env('COS_SECRET_ID'),
+            'secret_key' => get_env('COS_SECRET_KEY'),
+            'region' => get_env('COS_REGION', 'ap-guangzhou'),
+            'bucket' => get_env('COS_BUCKET'),  // 不带数字 app_id 后缀
+            // 可选，如果 bucket 为私有访问请打开此项
+            'signed_url' => false,
+            // 可选，是否使用 https，默认 false0
+            'use_https' => true,
+            // 可选，自定义域名
+            'domain' => 'emample-12340000.cos.test.com',
+            // 可选，使用 CDN 域名时指定生成的 URL host
+            'cdn' => get_env('COS_CDN'),
+            'prefix' => get_env('COS_PATH_PREFIX'), // 全局路径前缀
+            'guzzle' => [
+                'timeout' => get_env('COS_TIMEOUT', 60),
+                'connect_timeout' => get_env('COS_CONNECT_TIMEOUT', 60),
+            ],
+        ],
+        'oss' => \WebmanTech\LaravelFilesystem\VersionHelper::isGteLaravel9()
+            ? [
+                // 配置与使用：https://github.com/alphasnow/aliyun-oss-laravel
+                'driver' => \WebmanTech\LaravelFilesystem\Extend\OssAlphaSnowExtend::class,
+                // v4 的参数见：https://github.com/alphasnow/aliyun-oss-laravel/blob/4.x/config/config.php
+                "access_key_id" => get_env("OSS_ACCESS_KEY_ID", 'xxx'),           // Required, YourAccessKeyId
+                "access_key_secret" => get_env("OSS_ACCESS_KEY_SECRET", 'xxx'),       // Required, YourAccessKeySecret
+                "bucket" => get_env("OSS_BUCKET", 'my-storage'),                  // Required, For example: my-bucket
+                "endpoint" => get_env("OSS_ENDPOINT", 'oss-cn-shanghai.aliyuncs.com'),                // Required, For example: oss-cn-shanghai.aliyuncs.com
+                "internal" => get_env("OSS_INTERNAL", null),          // Optional, For example: oss-cn-shanghai-internal.aliyuncs.com
+                "domain" => get_env("OSS_DOMAIN", null),            // Optional, For example: oss.my-domain.com
+                "prefix" => get_env("OSS_PREFIX", ""),              // Optional, The prefix of the store path
+                "use_ssl" => get_env("OSS_SSL"),              // Optional, Whether to use HTTPS
+                "reverse_proxy" => get_env("OSS_REVERSE_PROXY"),    // Optional, Whether to use the Reverse proxy, such as nginx
+                "throw" => get_env("OSS_THROW"),            // Optional, Whether to throw an exception that causes an error
+                "options" => [],                                 // Optional, Add global configuration parameters, For example: [\OSS\OssClient::OSS_CHECK_MD5 => false]
+                "macros" => []                                  // Optional, Add custom Macro, For example: [\App\Macros\ListBuckets::class, \App\Macros\CreateBucket::class]
+            ]
+            : [
+                // 配置与使用：https://github.com/alphasnow/aliyun-oss-laravel
+                'driver' => \WebmanTech\LaravelFilesystem\Extend\OssAlphaSnowExtend::class,
+                // v3 的参数见：https://github.com/alphasnow/aliyun-oss-laravel/blob/3.x/config/config.php
+                'access_id' => get_env('OSS_ACCESS_ID', 'xxx'), // AccessKey ID, For example: LTAI4**************qgcsA
+                'access_key' => get_env('OSS_ACCESS_KEY', 'xxx'), // AccessKey Secret, For example: PkT4F********************Bl9or
+                'bucket' => get_env('OSS_BUCKET', 'my-storage'), // For example: my-storage
+                'endpoint' => get_env('OSS_ENDPOINT', 'oss-cn-shanghai.aliyuncs.com'), // For example: oss-cn-shanghai.aliyuncs.com
+                'internal' => get_env('OSS_INTERNAL'), // For example: oss-cn-shanghai-internal.aliyuncs.com
+                'domain' => get_env('OSS_DOMAIN'), // For example: oss.my-domain.com
+                'use_ssl' => get_env('OSS_USE_SSL', false), // Whether to use https
+                'prefix' => get_env('OSS_PREFIX'), // The prefix of the store path
+                'security_token' => get_env('OSS_TOKEN'),// Used by \OSS\OssClient
+                'request_proxy' => get_env('OSS_PROXY'),// Used by \OSS\OssClient
+                'use_domain_endpoint' => get_env('OSS_USE_DOMAIN_ENDPOINT', false), // Whether to upload using domain
+                'signature_expires' => get_env('OSS_SIGNATURE_EXPIRES', '+60 minutes'), // The valid time of the temporary url
+            ],
+        'oss2' => [
+            // 配置与使用：https://github.com/iiDestiny/laravel-filesystem-oss
+            'driver' => \WebmanTech\LaravelFilesystem\Extend\OssIiDestinyExtend::class,
+            'root' => '', // 设置上传时根前缀
+            'access_key' => get_env('OSS_ACCESS_KEY', 'xxx'),
+            'secret_key' => get_env('OSS_SECRET_KEY', 'xxx'),
+            'endpoint' => get_env('OSS_ENDPOINT', 'oss-cn-shanghai.aliyuncs.com'), // 使用 ssl 这里设置如: https://oss-cn-beijing.aliyuncs.com
+            'bucket' => get_env('OSS_BUCKET', 'my-storage'),
+            'isCName' => get_env('OSS_IS_CNAME'), // 如果 isCname 为 false，endpoint 应配置 oss 提供的域名如：`oss-cn-beijing.aliyuncs.com`，否则为自定义域名，，cname 或 cdn 请自行到阿里 oss 后台配置并绑定 bucket
+            // 如果有更多的 bucket 需要切换，就添加所有bucket，默认的 bucket 填写到上面，不要加到 buckets 中
+            'buckets' => [
+                'test' => [
+                    'access_key' => get_env('OSS_ACCESS_KEY'),
+                    'secret_key' => get_env('OSS_SECRET_KEY'),
+                    'bucket' => get_env('OSS_TEST_BUCKET'),
+                    'endpoint' => get_env('OSS_TEST_ENDPOINT'),
+                    'isCName' => get_env('OSS_TEST_IS_CNAME'),
+                ],
+                //...
+            ],
+        ],
     ],
     'links' => [
         public_path() . '/storage' => storage_path() . '/app/public',