diff --git a/tests/Unit/Auth/UseCases/CreateSessionTest.php b/tests/Unit/Auth/UseCases/CreateSessionTest.php
new file mode 100644
index 0000000..f58f66f
--- /dev/null
+++ b/tests/Unit/Auth/UseCases/CreateSessionTest.php
@@ -0,0 +1,83 @@
+<?php
+
+namespace Tests\Unit\Auth\UseCases;
+
+use App\Auth\UseCases\CreateSession;
+use App\User\User;
+use App\ValueObjects\EmailAddress;
+use DateTimeImmutable;
+use PHPUnit\Framework\TestCase;
+use Tests\Fakes\FakeClock;
+use Tests\Fakes\FakeSessionRepository;
+use Tests\Fakes\FakeTokenGenerator;
+
+class CreateSessionTest extends TestCase
+{
+    private FakeSessionRepository $sessionRepo;
+    private FakeTokenGenerator $tokenGenerator;
+    private FakeClock $clock;
+    private CreateSession $useCase;
+    private User $user;
+
+    public function setUp(): void
+    {
+        $this->sessionRepo = new FakeSessionRepository();
+        $this->tokenGenerator = new FakeTokenGenerator(
+            ['generated-token-abc']
+        );
+        $this->clock = new FakeClock(
+            new DateTimeImmutable('2025-01-01T12:00:00+00:00')
+        );
+        $this->useCase = new CreateSession(
+            $this->sessionRepo,
+            $this->tokenGenerator,
+            $this->clock,
+        );
+        $this->user = new User(
+            id: 7,
+            email: new EmailAddress('test@test.com'),
+        );
+    }
+
+    public function test_creates_session_for_user(): void
+    {
+        $session = $this->useCase->execute($this->user);
+
+        $this->assertEquals(7, $session->getUserId());
+    }
+
+    public function test_session_token_comes_from_generator(): void
+    {
+        $session = $this->useCase->execute($this->user);
+
+        $this->assertEquals('generated-token-abc', $session->getToken());
+    }
+
+    public function test_session_created_at_is_now(): void
+    {
+        $session = $this->useCase->execute($this->user);
+
+        $this->assertEquals(
+            new DateTimeImmutable('2025-01-01T12:00:00+00:00'),
+            $session->getCreatedAt()
+        );
+    }
+
+    public function test_session_expires_in_seven_days(): void
+    {
+        $session = $this->useCase->execute($this->user);
+
+        $this->assertEquals(
+            new DateTimeImmutable('2025-01-08T12:00:00+00:00'),
+            $session->getExpiresAt()
+        );
+    }
+
+    public function test_session_is_persisted(): void
+    {
+        $this->useCase->execute($this->user);
+
+        $found = $this->sessionRepo->findByToken('generated-token-abc');
+        $this->assertNotNull($found);
+    }
+}