$user = factory(AppUser::class)->create(['password' => Hash::make('password')]);
        $this->actingAs($user);

        $response = $this->call('PUT', '/user/update-password', array(
            '_token' => csrf_token(),
            'current_password' => 'password',
            'new_password' => 'newone',
            'repeat_new_password' => 'newone',
        ));
        $response->assertStatus(302);

        $this->assertDatabaseHas('users', ['name' => $user->name, 'password' => Hash::make('newone')]);

....
$user->password = Hash::make($request->new_password);
$user->save();
....