diff --git a/app/Domains/Purchase/Services/Checkout/StartCheckoutService.php b/app/Domains/Purchase/Services/Checkout/StartCheckoutService.php
index 6c3c7a3..60a7ccb 100644
--- a/app/Domains/Purchase/Services/Checkout/StartCheckoutService.php
+++ b/app/Domains/Purchase/Services/Checkout/StartCheckoutService.php
@@ -7,8 +7,8 @@ use App\Domains\Cart\Models\CartItem;
 use App\Domains\Catalog\Models\CatalogItem;
 use App\Domains\Catalog\Models\Variant;
 use App\Domains\Catalog\Services\CatalogInventoryService;
-use App\Domains\Purchase\Models\Purchase;
 use App\Domains\Purchase\Exceptions\InsufficientStockException;
+use App\Domains\Purchase\Models\Purchase;
 use App\Domains\Purchase\Services\UserPurchaseLimitService;
 use App\Domains\Tenant\Models\Tenant;
 use Illuminate\Support\Collection;
diff --git a/bootstrap/app.php b/bootstrap/app.php
index 8a1b5e6..c4bafaf 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -1,8 +1,8 @@
 <?php
 
 use App\Domains\Auth\Exceptions\AccountLockedException;
-use App\Domains\Ticket\Exceptions\TicketNotAvailableException;
 use App\Domains\Purchase\Exceptions\InsufficientStockException;
+use App\Domains\Ticket\Exceptions\TicketNotAvailableException;
 use App\Http\Middleware\EnsureAdminAppTenant;
 use App\Http\Middleware\EnsureScannerTenant;
 use App\Http\Middleware\EnsureTenantHasMenu;
diff --git a/tests/Unit/Purchase/InsufficientStockMessageBuilderTest.php b/tests/Unit/Purchase/InsufficientStockMessageBuilderTest.php
index c84016a..90b8eda 100644
--- a/tests/Unit/Purchase/InsufficientStockMessageBuilderTest.php
+++ b/tests/Unit/Purchase/InsufficientStockMessageBuilderTest.php
@@ -9,6 +9,7 @@ use App\Domains\Catalog\Models\CatalogItem;
 use App\Domains\Catalog\Models\ItemAttribute;
 use App\Domains\Catalog\Models\Variant;
 use App\Domains\Catalog\Models\VariantDefinition;
+use App\Domains\Purchase\Exceptions\InsufficientStockException;
 use App\Domains\Purchase\Services\Checkout\InsufficientStockMessageBuilder;
 use Illuminate\Database\Eloquent\Collection as EloquentCollection;
 use Illuminate\Support\Facades\App;
@@ -16,6 +17,38 @@ use Tests\TestCase;
 
 class InsufficientStockMessageBuilderTest extends TestCase
 {
+    public function test_insufficient_stock_exception_exposes_every_conflicting_variant(): void
+    {
+        $exception = new InsufficientStockException([
+            [
+                'index' => 1,
+                'catalog_item_id' => 10,
+                'variant_id' => 102,
+                'requested_quantity' => 1,
+                'available_quantity' => 0,
+                'message' => 'El asiento A2 ya no está disponible.',
+            ],
+            [
+                'index' => 3,
+                'catalog_item_id' => 10,
+                'variant_id' => 104,
+                'requested_quantity' => 1,
+                'available_quantity' => 0,
+                'message' => 'El asiento B4 ya no está disponible.',
+            ],
+        ]);
+
+        $this->assertSame(
+            'El asiento A2 ya no está disponible. El asiento B4 ya no está disponible.',
+            $exception->getMessage(),
+        );
+        $this->assertSame([
+            'direct_items.1.cantidad' => ['El asiento A2 ya no está disponible.'],
+            'direct_items.3.cantidad' => ['El asiento B4 ya no está disponible.'],
+        ], $exception->errors());
+        $this->assertSame([102, 104], collect($exception->unavailableItems)->pluck('variant_id')->all());
+    }
+
     public function test_it_builds_a_localized_seat_message_from_the_variant_selection(): void
     {
         [$catalogItem, $variant] = $this->seatSelection();