diff --git a/backend/tests/Feature/Auth/AuthMiddlewareTest.php b/backend/tests/Feature/Auth/AuthMiddlewareTest.php
index bbc07bd..8d84a1d 100644
--- a/backend/tests/Feature/Auth/AuthMiddlewareTest.php
+++ b/backend/tests/Feature/Auth/AuthMiddlewareTest.php
@@ -2,6 +2,7 @@
 
 namespace Tests\Feature\Auth;
 
+use App\Auth\Clock;
 use App\Auth\CreateSessionDto;
 use App\Auth\SessionRepository;
 use App\Http\Middleware\AuthMiddleware;
@@ -15,16 +16,22 @@ use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Route;
+use Tests\Fakes\FakeClock;
 use Tests\TestCase;
 
 class AuthMiddlewareTest extends TestCase
 {
     use RefreshDatabase;
 
+    private DateTimeImmutable $now;
+
     protected function setUp(): void
     {
         parent::setUp();
 
+        $this->now = $this->utc('2026-07-31T12:00:00');
+        $this->app->instance(Clock::class, new FakeClock($this->now));
+
         Route::middleware(AuthMiddleware::class)->get(
             '/test/authenticated-user',
             function (Request $request): JsonResponse {
@@ -45,7 +52,7 @@ class AuthMiddlewareTest extends TestCase
     {
         $user = $this->createUserAndSession(
             token: 'valid-token',
-            expiresAt: $this->utc('2030-08-07T12:00:00'),
+            expiresAt: $this->now->modify('+7 days'),
         );
 
         $response = $this->withCredentials()
@@ -73,7 +80,7 @@ class AuthMiddlewareTest extends TestCase
     {
         $this->createUserAndSession(
             token: 'expired-token',
-            expiresAt: $this->utc('2020-08-07T12:00:00'),
+            expiresAt: $this->now->modify('-1 day'),
         );
 
         $response = $this->withCredentials()
@@ -98,7 +105,7 @@ class AuthMiddlewareTest extends TestCase
         app(SessionRepository::class)->create(new CreateSessionDto(
             token: $token,
             user: $user,
-            createdAt: $this->utc('2026-07-31T12:00:00'),
+            createdAt: $this->now,
             expiresAt: $expiresAt,
         ));