diff --git a/phpunit.xml b/phpunit.xml
index 223c0a8..2ab46a1 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -4,6 +4,9 @@
     <testsuite name="Unit">
       <directory>tests/Unit</directory>
     </testsuite>
+    <testsuite name="Integration">
+      <directory>tests/Integration</directory>
+    </testsuite>
     <testsuite name="Feature">
       <directory>tests/Feature</directory>
     </testsuite>
diff --git a/tests/Architecture/ApplicationTest.php b/tests/Architecture/ApplicationTest.php
index eeeb528..2907c3c 100644
--- a/tests/Architecture/ApplicationTest.php
+++ b/tests/Architecture/ApplicationTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Architecture;
+
 describe('Application Architecture Rules', function (): void {
     arch('Application layer does not depend on Presentation, Infra, or App')
         ->expect('Application')
diff --git a/tests/Architecture/CodingStandardsTest.php b/tests/Architecture/CodingStandardsTest.php
index 8e67f7a..0d51833 100644
--- a/tests/Architecture/CodingStandardsTest.php
+++ b/tests/Architecture/CodingStandardsTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Architecture;
+
 describe('Coding Standards & Project Rules', function (): void {
     arch()->preset()->php();
     // Le helper assert natif est interdit en faveur de Webmozart\Assert
@@ -58,4 +60,25 @@ describe('Coding Standards & Project Rules', function (): void {
     arch('all Shared source files use strict types')
         ->expect('Shared')
         ->toUseStrictTypes();
+
+    arch('all test files belong to Tests namespace and use strict types')
+        ->expect('Tests')
+        ->toUseStrictTypes();
+
+    it('ensures every test file in tests directory has a namespace', function (): void {
+        /** @var array<int, string> $testFiles */
+        $testFiles = glob(base_path('tests/{*,*/*,*/*/*,*/*/*/*}.php'), GLOB_BRACE);
+
+        foreach ($testFiles as $file) {
+            if (preg_match('/Test\.php$/', basename($file)) !== 1) {
+                continue;
+            }
+
+            $content = (string) file_get_contents($file);
+            expect($content)->toMatch(
+                '/^\s*namespace\s+Tests/m',
+                "File [{$file}] is missing a namespace Tests declaration."
+            );
+        }
+    });
 });
diff --git a/tests/Architecture/DomainTest.php b/tests/Architecture/DomainTest.php
index 7089882..98a666c 100644
--- a/tests/Architecture/DomainTest.php
+++ b/tests/Architecture/DomainTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Architecture;
+
 use Shared\DDD\Directory;
 use Shared\DDD\Entity;
 use Shared\DDD\Repository;
diff --git a/tests/Architecture/InfraTest.php b/tests/Architecture/InfraTest.php
index 664067b..2b26705 100644
--- a/tests/Architecture/InfraTest.php
+++ b/tests/Architecture/InfraTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Architecture;
+
 use Illuminate\Database\Eloquent\Model;
 
 describe('Infra Architecture Rules', function (): void {
diff --git a/tests/Architecture/NamingConventionsTest.php b/tests/Architecture/NamingConventionsTest.php
index 67edb8a..8631520 100644
--- a/tests/Architecture/NamingConventionsTest.php
+++ b/tests/Architecture/NamingConventionsTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Architecture;
+
 describe('Naming Conventions in Application', function (): void {
     arch('Application usecases use strict types')
         ->expect('Application\Usecase')
diff --git a/tests/Architecture/PresentationTest.php b/tests/Architecture/PresentationTest.php
index e51ee6b..d4efbd6 100644
--- a/tests/Architecture/PresentationTest.php
+++ b/tests/Architecture/PresentationTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Architecture;
+
 use Presentation\Api\V1\Contracts\ApiResponse;
 
 describe('Presentation Architecture Rules', function (): void {
diff --git a/tests/Integration/Shared/Helpers/DateHelperTest.php b/tests/Integration/Shared/Helpers/DateHelperTest.php
index c7eb0a3..0210e7a 100644
--- a/tests/Integration/Shared/Helpers/DateHelperTest.php
+++ b/tests/Integration/Shared/Helpers/DateHelperTest.php
@@ -2,6 +2,8 @@
 
 declare(strict_types=1);
 
+namespace Tests\Integration\Shared\Helpers;
+
 use Illuminate\Support\Facades\Date;
 use Shared\Helpers\DatesHelper;