diff --git a/backend/tests/Feature/User/EloquentUserRepositoryTest.php b/backend/tests/Feature/User/EloquentUserRepositoryTest.php
new file mode 100644
index 0000000..207523f
--- /dev/null
+++ b/backend/tests/Feature/User/EloquentUserRepositoryTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Tests\Feature\User;
+
+use App\Shared\ValueObject\EmailAddress;
+use App\User\CreateUserDto;
+use App\User\UserRepository;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class EloquentUserRepositoryTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_it_creates_and_finds_a_user(): void
+    {
+        $repository = app(UserRepository::class);
+        $user = $repository->create(new CreateUserDto(
+            email: new EmailAddress('Founder@EXAMPLE.COM'),
+        ));
+
+        $this->assertGreaterThan(0, $user->getId());
+        $this->assertSame(
+            'Founder@example.com',
+            $user->getEmail()->value(),
+        );
+        $this->assertDatabaseHas('users', [
+            'id' => $user->getId(),
+            'email' => 'Founder@example.com',
+        ]);
+
+        $foundUser = $repository->find($user->getId());
+
+        $this->assertNotNull($foundUser);
+        $this->assertSame($user->getId(), $foundUser->getId());
+        $this->assertSame(
+            $user->getEmail()->value(),
+            $foundUser->getEmail()->value(),
+        );
+    }
+
+    public function test_it_returns_null_for_an_unknown_user(): void
+    {
+        $repository = app(UserRepository::class);
+
+        $this->assertNull($repository->find(999));
+    }
+}
diff --git a/backend/tests/Unit/Shared/ValueObject/EmailAddressTest.php b/backend/tests/Unit/Shared/ValueObject/EmailAddressTest.php
new file mode 100644
index 0000000..c47b3e4
--- /dev/null
+++ b/backend/tests/Unit/Shared/ValueObject/EmailAddressTest.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Tests\Unit\Shared\ValueObject;
+
+use App\Shared\ValueObject\EmailAddress;
+use InvalidArgumentException;
+use PHPUnit\Framework\TestCase;
+
+class EmailAddressTest extends TestCase
+{
+    public function test_it_rejects_an_invalid_email_address(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage(
+            'Invalid email address: invalid-email',
+        );
+
+        new EmailAddress('invalid-email');
+    }
+
+    public function test_it_trims_and_normalizes_the_domain(): void
+    {
+        $email = new EmailAddress(' Founder@EXAMPLE.COM ');
+
+        $this->assertSame('Founder@example.com', $email->value());
+    }
+}
diff --git a/backend/tests/Unit/User/UserTest.php b/backend/tests/Unit/User/UserTest.php
new file mode 100644
index 0000000..0ac8d53
--- /dev/null
+++ b/backend/tests/Unit/User/UserTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Tests\Unit\User;
+
+use App\Shared\ValueObject\EmailAddress;
+use App\User\User;
+use PHPUnit\Framework\TestCase;
+
+class UserTest extends TestCase
+{
+    public function test_it_exposes_its_identity_and_email(): void
+    {
+        $email = new EmailAddress('user@example.com');
+        $user = new User(id: 42, email: $email);
+
+        $this->assertSame(42, $user->getId());
+        $this->assertSame($email, $user->getEmail());
+    }
+}