diff --git a/app/Domains/Ticketing/Event/Models/Event.php b/app/Domains/Ticketing/Event/Models/Event.php
index e31c9ca..5ca611e 100644
--- a/app/Domains/Ticketing/Event/Models/Event.php
+++ b/app/Domains/Ticketing/Event/Models/Event.php
@@ -2,9 +2,9 @@
 
 namespace App\Domains\Ticketing\Event\Models;
 
+use App\Domains\Commerce\Catalog\Models\CatalogItem;
 use App\Domains\Core\Tenant\Models\SocialMedia;
 use App\Domains\Core\Tenant\Models\Tenant;
-use App\Domains\Commerce\Catalog\Models\CatalogItem;
 use App\Shared\Attachable\Models\Attachment;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
diff --git a/app/Domains/Ticketing/Event/Resources/EventResource.php b/app/Domains/Ticketing/Event/Resources/EventResource.php
index 29ff0b3..16f802a 100644
--- a/app/Domains/Ticketing/Event/Resources/EventResource.php
+++ b/app/Domains/Ticketing/Event/Resources/EventResource.php
@@ -2,8 +2,8 @@
 
 namespace App\Domains\Ticketing\Event\Resources;
 
-use App\Domains\Ticketing\Event\Services\EventDateGroupingService;
 use App\Domains\Ticketing\Event\Models\Event;
+use App\Domains\Ticketing\Event\Services\EventDateGroupingService;
 use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\JsonResource;
 
diff --git a/database/migrations/2026_09_22_010000_add_slugs_to_events.php b/database/migrations/2026_09_22_010000_add_slugs_to_events.php
index 4fbb077..0b0781c 100644
--- a/database/migrations/2026_09_22_010000_add_slugs_to_events.php
+++ b/database/migrations/2026_09_22_010000_add_slugs_to_events.php
@@ -11,14 +11,14 @@ return new class extends Migration
     public function up(): void
     {
         Schema::table('events', function (Blueprint $table): void {
-            $table->string('slug')->nullable()->after('tenant_code');
+            $table->string('slug')->nullable();
         });
 
         $usedSlugsByTenant = [];
 
         foreach (DB::table('events')->orderBy('tenant_code')->orderBy('id')->get() as $event) {
             $baseSlug = Str::slug((string) $event->title);
-            $baseSlug = $baseSlug !== '' ? mb_substr($baseSlug, 0, 240) : 'evento-'.$event->id;
+            $baseSlug = $baseSlug !== '' ? substr($baseSlug, 0, 240) : 'evento-'.$event->id;
             $slug = $baseSlug;
             $suffix = 2;
 
diff --git a/tests/Feature/Event/PublicEventControllerTest.php b/tests/Feature/Event/PublicEventControllerTest.php
new file mode 100644
index 0000000..0511204
--- /dev/null
+++ b/tests/Feature/Event/PublicEventControllerTest.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace Tests\Feature\Event;
+
+use App\Domains\Core\Tenant\Models\Tenant;
+use App\Domains\Ticketing\Event\Models\Event;
+use App\Shared\Attachable\Enums\AttachmentType;
+use App\Shared\Attachable\Models\Attachment;
+use Database\Seeders\WebsiteTypeSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Str;
+use Tests\TestCase;
+
+class PublicEventControllerTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_it_resolves_an_event_by_slug_within_its_tenant(): void
+    {
+        $this->seed(WebsiteTypeSeeder::class);
+        $firstTenant = $this->createTenant('first');
+        $secondTenant = $this->createTenant('second');
+
+        Event::query()->create([
+            'tenant_code' => $firstTenant->codigo,
+            'slug' => 'gran-fiesta',
+            'title' => 'Fiesta del primer tenant',
+            'published_at' => now()->subMinute(),
+        ]);
+        Event::query()->create([
+            'tenant_code' => $secondTenant->codigo,
+            'slug' => 'gran-fiesta',
+            'title' => 'Fiesta del segundo tenant',
+            'published_at' => now()->subMinute(),
+        ]);
+
+        $this->getJson('/api/tenants/second/events/gran-fiesta')
+            ->assertOk()
+            ->assertJsonPath('data.slug', 'gran-fiesta')
+            ->assertJsonPath('data.title', 'Fiesta del segundo tenant');
+    }
+
+    public function test_it_does_not_resolve_the_old_numeric_event_url(): void
+    {
+        $this->seed(WebsiteTypeSeeder::class);
+        $tenant = $this->createTenant('acme');
+        $event = Event::query()->create([
+            'tenant_code' => $tenant->codigo,
+            'slug' => 'gran-fiesta',
+            'title' => 'Gran Fiesta',
+            'published_at' => now()->subMinute(),
+        ]);
+
+        $this->getJson("/api/tenants/acme/events/{$event->id}")->assertNotFound();
+    }
+
+    private function createTenant(string $code): Tenant
+    {
+        $header = $this->createAttachment($code.'-header');
+        $footer = $this->createAttachment($code.'-footer');
+
+        return Tenant::query()->create([
+            'codigo' => $code,
+            'nombre' => ucfirst($code),
+            'dominio' => $code.'.test',
+            'storefront_website_type_code' => 'onticket_multi_event',
+            'primary_color' => '#000000',
+            'secondary_color' => '#000000',
+            'danger_color' => '#000000',
+            'success_color' => '#000000',
+            'header_bg_color' => '#000000',
+            'footer_bg_color' => '#000000',
+            'header_logo_id' => $header->id,
+            'footer_logo_id' => $footer->id,
+        ]);
+    }
+
+    private function createAttachment(string $name): Attachment
+    {
+        return Attachment::query()->create([
+            'key' => (string) Str::uuid(),
+            'path' => 'test/'.$name.'.png',
+            'filename' => $name.'.png',
+            'type' => AttachmentType::Image,
+            'mime_type' => 'image/png',
+        ]);
+    }
+}
diff --git a/tests/Feature/Migrations/AddSlugsToEventsTest.php b/tests/Feature/Migrations/AddSlugsToEventsTest.php
new file mode 100644
index 0000000..00328dc
--- /dev/null
+++ b/tests/Feature/Migrations/AddSlugsToEventsTest.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Tests\Feature\Migrations;
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Tests\TestCase;
+
+class AddSlugsToEventsTest extends TestCase
+{
+    public function test_it_backfills_unique_slugs_per_tenant(): void
+    {
+        Schema::create('events', function (Blueprint $table): void {
+            $table->id();
+            $table->string('tenant_code');
+            $table->string('title');
+        });
+
+        DB::table('events')->insert([
+            ['id' => 1, 'tenant_code' => 'acme', 'title' => 'Gran Fiesta'],
+            ['id' => 2, 'tenant_code' => 'acme', 'title' => 'Gran Fiesta'],
+            ['id' => 3, 'tenant_code' => 'other', 'title' => 'Gran Fiesta'],
+            ['id' => 4, 'tenant_code' => 'acme', 'title' => '---'],
+        ]);
+
+        $migration = require database_path('migrations/2026_09_22_010000_add_slugs_to_events.php');
+        $migration->up();
+
+        $this->assertSame([
+            1 => 'gran-fiesta',
+            2 => 'gran-fiesta-2',
+            3 => 'gran-fiesta',
+            4 => 'evento-4',
+        ], DB::table('events')->orderBy('id')->pluck('slug', 'id')->all());
+    }
+}