diff --git a/src/Console/ParallelCommand.php b/src/Console/ParallelCommand.php
index b7335ac..3009e8f 100644
--- a/src/Console/ParallelCommand.php
+++ b/src/Console/ParallelCommand.php
@@ -11,6 +11,7 @@
 use Illuminate\Queue\SerializesAndRestoresModelIdentifiers;
 use Illuminate\Support\Facades\Auth;
 use Recca0120\LaravelParallel\ResponseIdentifier;
+use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
@@ -18,6 +19,7 @@
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\HttpFoundation\Response;
 
+#[AsCommand(self::COMMAND_NAME)]
 class ParallelCommand extends Command
 {
     use MakesHttpRequests;
@@ -35,7 +37,7 @@ class ParallelCommand extends Command
      */
     protected $app;
 
-    public function __construct(Application $app = null)
+    public function __construct(?Application $app = null)
     {
         parent::__construct();
         $this->setLaravel($app);
@@ -44,7 +46,7 @@ public function __construct(Application $app = null)
     /**
      * @return $this
      */
-    public function setLaravel(Application $app = null): self
+    public function setLaravel(?Application $app = null): self
     {
         $this->app = $app;
 
diff --git a/src/ParallelArtisan.php b/src/ParallelArtisan.php
index fca1ca3..d74a1a0 100644
--- a/src/ParallelArtisan.php
+++ b/src/ParallelArtisan.php
@@ -35,7 +35,7 @@ class ParallelArtisan
      */
     private $process;
 
-    public function __construct(Request $request = null, array $env = [])
+    public function __construct(?Request $request = null, array $env = [])
     {
         $this->request = $request ?? Request::capture();
         $this->setEnv($env);
@@ -90,14 +90,14 @@ private function parseParameters(array $parameters): array
 
         $params = [];
         foreach ($parameters as $param => $val) {
-            if ($param && is_string($param) && '-' === $param[0]) {
-                $glue = ('-' === $param[1]) ? '=' : ' ';
+            if ($param && is_string($param) && $param[0] === '-') {
+                $glue = ($param[1] === '-') ? '=' : ' ';
                 if (is_array($val)) {
                     foreach ($val as $v) {
-                        $params[] = $param.('' !== $v ? $glue.$v : '');
+                        $params[] = $param.($v !== '' ? $glue.$v : '');
                     }
                 } else {
-                    $params[] = $param.('' !== $val ? $glue.$val : '');
+                    $params[] = $param.($val !== '' ? $glue.$val : '');
                 }
             } else {
                 $params[] = is_array($val) ? implode(' ', $val) : $val;
diff --git a/src/ParallelRequest.php b/src/ParallelRequest.php
index ffe859c..9c28af4 100644
--- a/src/ParallelRequest.php
+++ b/src/ParallelRequest.php
@@ -12,8 +12,8 @@
 
 class ParallelRequest
 {
-    use MakesHttpRequests;
     use InteractsWithAuthentication;
+    use MakesHttpRequests;
 
     /**
      * @var Request|null
@@ -23,7 +23,7 @@ class ParallelRequest
     /**
      * AsyncRequest constructor.
      */
-    public function __construct(Request $request = null)
+    public function __construct(?Request $request = null)
     {
         $this->request = $request ?? Request::capture();
     }
@@ -36,7 +36,7 @@ public static function setBinary(string $binary): void
     /**
      * @return $this
      */
-    public static function create(Request $request = null): self
+    public static function create(?Request $request = null): self
     {
         return new static($request);
     }
diff --git a/src/ResponseIdentifier.php b/src/ResponseIdentifier.php
index 0a4c41b..8602882 100644
--- a/src/ResponseIdentifier.php
+++ b/src/ResponseIdentifier.php
@@ -79,7 +79,7 @@ public function toResponse(): Response
      *
      * @license https://github.com/guzzle/psr7/blob/2.4.0/LICENSE
      *
-     * @param  string  $message HTTP request or response to parse.
+     * @param  string  $message  HTTP request or response to parse.
      */
     private static function parseMessage(string $message): array
     {
diff --git a/src/Tests/Concerns/WithParallelPhyiscalDatabase.php b/src/Tests/Concerns/WithParallelPhyiscalDatabase.php
index d90bc2b..5bfac43 100644
--- a/src/Tests/Concerns/WithParallelPhyiscalDatabase.php
+++ b/src/Tests/Concerns/WithParallelPhyiscalDatabase.php
@@ -74,9 +74,6 @@ protected function refreshParallelPhyiscalDatabase(): void
         }
     }
 
-    /**
-     * @return void
-     */
     private function bindParallelRequest(): void
     {
         $this->app->bind(ParallelRequest::class, function () {
diff --git a/tests/Fixtures/artisan b/tests/Fixtures/artisan
index 9bf9421..7d3f094 100644
--- a/tests/Fixtures/artisan
+++ b/tests/Fixtures/artisan
@@ -9,6 +9,7 @@ use Orchestra\Testbench\Concerns\HandlesRoutes;
 use Recca0120\LaravelParallel\Console\ParallelCommand;
 use Recca0120\LaravelParallel\Tests\Fixtures\SetupDatabase;
 use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
@@ -118,6 +119,7 @@ $laravel = new class() {
     }
 };
 
+#[AsCommand('echo')]
 class EchoCommand extends Command
 {
     protected static $defaultName = 'echo';