Laravel HTTP Test trying to get property "object" of undefined

I'm Using HTTP Test with PHPUnit to create test with users feature

but when i run mySampleTest like this;

  $this->get(route('users.index'))->assertStatus(200);

while the method of index like this

  $users = User::paginate(15);
        return view('users.index',compact('users'));

and the view :

<tbody>
            @foreach ($users->where('id', '!=' ,auth()->id()) as $key => $user)
            <tr>
                <td>{{$key}}</td>
                <td>{{$user->name}}</td>
                <td>{{$user->role->name}}</td>
                <td>
                    <a href="{{route('users.show',$user->id)}}">Show</a>
                </td>
                <td>
                    <a href="{{route('users.edit',$user->id)}}">Edit</a>
                </td>
                <td>
                    <form action="{{route('users.destroy',$user->id)}}" method="post">
                        @csrf
                        @method("DELETE")
                        <button type="submit" class="btn btn-danger">Delete</button>
                    </form>
                </td>
            </tr>
            @endforeach
        </tbody>

it throw an error like "trying to get property 'name' of undefined, what's the problem with my test code?