Laravel PHPUnit测试抛出禁止错误

Question

我编写了两个PHPUnit测试，仅当用户通过身份验证时，该测试才更新和删除书记录。我正在使用Passport进行身份验证，但是两个测试均失败，并显示403错误。我下面的代码可能有什么问题

public function test_onlyAuthenticatedUserCanUpdateBookSuccessfully()
{
    $user = factory(User::class)->create();
    Passport::actingAs($user);

    $book = factory(Book::class)->create();

    $response = $this->json('PUT', '/api/books/'.$book->id, [
            'id'    => $book->id,
            'title' => 'Updated book title',
            'author'=> 'New Guy'
        ]);

    $response->assertStatus(201);
}

public function test_onlyAuthenticatedUserCanDeleteBook()
{
    $user = factory(User::class)->create();
    Passport::actingAs($user);

    $book = factory(Book::class)->create();

    $response = $this->json('DELETE', '/api/books/'.$book->id);

    $response->assertStatus(204);
}

这是路由文件夹中的api.php文件

Route::apiResource('books', 'BookController');