diff --git a/src/Drivers/Driver.php b/src/Drivers/Driver.php
index ada3c73..72b82a9 100644
--- a/src/Drivers/Driver.php
+++ b/src/Drivers/Driver.php
@@ -6,7 +6,7 @@
 
 interface Driver
 {
-    public function storeItem(Model|array $item, int|null $userId = null): Driver;
+    public function storeItem(Model|array $item, ?int $userId = null): Driver;
 
     public function storeItems(array $items): Driver;
 
diff --git a/src/Drivers/LaravelCartDatabase.php b/src/Drivers/LaravelCartDatabase.php
index 56e6c6f..28c2fc3 100644
--- a/src/Drivers/LaravelCartDatabase.php
+++ b/src/Drivers/LaravelCartDatabase.php
@@ -10,7 +10,7 @@ class LaravelCartDatabase implements Driver
     /**
      * Store item in cart.
      */
-    public function storeItem(Model|array $item, int|null $userId = null): static
+    public function storeItem(Model|array $item, ?int $userId = null): static
     {
         if (is_null($userId)) {
             $userId = auth()->id();
diff --git a/src/LaravelCart.php b/src/LaravelCart.php
index efafa82..2b0b7dc 100644
--- a/src/LaravelCart.php
+++ b/src/LaravelCart.php
@@ -12,7 +12,6 @@
  * @method static \Binafy\LaravelCart\Drivers\Driver decreaseQuantity(\Illuminate\Database\Eloquent\Model $item, int $quantity = 1)
  * @method static \Binafy\LaravelCart\Drivers\Driver removeItem(\Illuminate\Database\Eloquent\Model $item)
  * @method static \Binafy\LaravelCart\Drivers\Driver emptyCart()
- *
  * @method static string getDefaultDriver()
  * @method static void setDefaultDriver(string $name)
  *
diff --git a/tests/Feature/Manager/Database/CartDeleteTest.php b/tests/Feature/Manager/Database/CartDeleteTest.php
index 3d658d8..86227d1 100644
--- a/tests/Feature/Manager/Database/CartDeleteTest.php
+++ b/tests/Feature/Manager/Database/CartDeleteTest.php
@@ -5,6 +5,7 @@
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Tests\SetUp\Models\Product;
 use Tests\SetUp\Models\User;
+
 use function Pest\Laravel\assertDatabaseCount;
 
 /*
diff --git a/tests/Feature/Manager/Database/CartStoreTest.php b/tests/Feature/Manager/Database/CartStoreTest.php
index a14561a..9a230b6 100644
--- a/tests/Feature/Manager/Database/CartStoreTest.php
+++ b/tests/Feature/Manager/Database/CartStoreTest.php
@@ -4,6 +4,7 @@
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Tests\SetUp\Models\Product;
 use Tests\SetUp\Models\User;
+
 use function Pest\Laravel\assertDatabaseCount;
 use function Pest\Laravel\assertDatabaseHas;
 
diff --git a/tests/Feature/Manager/Database/CartUpdateQuantityTest.php b/tests/Feature/Manager/Database/CartUpdateQuantityTest.php
index 015f985..7855e8e 100644
--- a/tests/Feature/Manager/Database/CartUpdateQuantityTest.php
+++ b/tests/Feature/Manager/Database/CartUpdateQuantityTest.php
@@ -6,6 +6,7 @@
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Tests\SetUp\Models\Product;
 use Tests\SetUp\Models\User;
+
 use function Pest\Laravel\assertDatabaseHas;
 use function Pest\Laravel\assertDatabaseMissing;
 
@@ -88,7 +89,7 @@
     assertDatabaseHas('cart_items', ['quantity' => 1]);
 
     // Increase quantity
-    LaravelCart::driver('database')->increaseQuantity($product2 , 2);
+    LaravelCart::driver('database')->increaseQuantity($product2, 2);
 
     assertDatabaseHas('cart_items', ['quantity' => 1]);
     assertDatabaseMissing('cart_items', ['quantity' => 3]);
@@ -116,7 +117,7 @@
     assertDatabaseHas('cart_items', ['quantity' => 3]);
 
     // Decrease quantity
-    LaravelCart::driver('database')->decreaseQuantity($product2 , 2);
+    LaravelCart::driver('database')->decreaseQuantity($product2, 2);
 
     assertDatabaseHas('cart_items', ['quantity' => 3]);
     assertDatabaseMissing('cart_items', ['quantity' => 1]);
diff --git a/tests/Feature/Models/CartDeleteTest.php b/tests/Feature/Models/CartDeleteTest.php
index 2adf2c3..d63be1e 100644
--- a/tests/Feature/Models/CartDeleteTest.php
+++ b/tests/Feature/Models/CartDeleteTest.php
@@ -4,6 +4,7 @@
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Tests\SetUp\Models\Product;
 use Tests\SetUp\Models\User;
+
 use function Pest\Laravel\assertDatabaseCount;
 
 /*
diff --git a/tests/Feature/Models/CartStoreTest.php b/tests/Feature/Models/CartStoreTest.php
index be90686..a363ef9 100644
--- a/tests/Feature/Models/CartStoreTest.php
+++ b/tests/Feature/Models/CartStoreTest.php
@@ -6,6 +6,7 @@
 use Illuminate\Support\Facades\Artisan;
 use Tests\SetUp\Models\Product;
 use Tests\SetUp\Models\User;
+
 use function Pest\Laravel\assertDatabaseCount;
 use function Pest\Laravel\assertDatabaseHas;
 use function Pest\Laravel\assertDatabaseMissing;
diff --git a/tests/Feature/Models/CartUpdateQuantityTest.php b/tests/Feature/Models/CartUpdateQuantityTest.php
index e9556f4..a4a8b14 100644
--- a/tests/Feature/Models/CartUpdateQuantityTest.php
+++ b/tests/Feature/Models/CartUpdateQuantityTest.php
@@ -5,6 +5,7 @@
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Tests\SetUp\Models\Product;
 use Tests\SetUp\Models\User;
+
 use function Pest\Laravel\assertDatabaseHas;
 
 /*