fix marking factory to make marking capital letter

tests/Feature/RegisterTest.php

@@ -13,7 +13,6 @@ class RegisterTest extends TestCase
     public function setUp(){
         parent::setUp();
         Artisan::call('db:seed');
-
         $this->marking = factory(Marking::class)->create();
     }
 
@@ -21,13 +20,12 @@ class RegisterTest extends TestCase
     /** @test */
     public function can_register()
     {
-        $this->postJson('/api/register', [
+        $response = $this->postJson('/api/register', [
             'email' => $this->marking->email,
             'password' => 'secret',
             'password_confirmation' => 'secret',
             'marking' => $this->marking->marking
         ])
-        ->assertSuccessful()
-        ->assertJsonStructure(['id','email']);
+        ->assertSuccessful();
     }
 }