diff --git a/tests/Fakes/FakeUserRepository.php b/tests/Fakes/FakeUserRepository.php
new file mode 100644
index 0000000..2890de9
--- /dev/null
+++ b/tests/Fakes/FakeUserRepository.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Tests\Fakes;
+
+use App\User\UseCases\CreateUserDto;
+use App\User\User;
+use App\User\UserRepository;
+
+class FakeUserRepository implements UserRepository
+{
+    /**
+     * @var User[]
+     */
+    private array $existingUsers = [];
+
+    public function find(int $id): ?User
+    {
+        $user = $this->existingUsers[$id];
+        if ($user === null) {
+            return null;
+        }
+
+        return new User(
+            id: $user->getId(),
+            email: $user->getEmail(),
+        );
+    }
+
+    public function create(CreateUserDto $dto): User
+    {
+        $id = $this->nextId();
+        $user = new User(
+            id: $id,
+            email: $dto->email,
+        );
+        $this->existingUsers[$id] = $user;
+
+        return $user;
+    }
+
+    private function nextId(): int
+    {
+        return count($this->existingUsers);
+    }
+}