unit testing: send parameters to endpoint

Hi, my question is how to send parameter to my endpoint.

route: Route::get('users/plan','DashboardController@filterPlan')->name('users.filter');

test

public function test_upgrade()
    {
       
        $billingChange3 = factory(Plan::class)->create([
            'user_id' => 1,
            'previous_price' => 50,
            'current_price' => 100,
        ]);
       
        $url = route(
            'users.filters'
        );
        $response = $this->actingAs($this->admin)->getJson($url,['search'=>'upgrade']);
        $response->assertStatus(200);
        //till here correct 
        //but here it should return 2 since I have upgrade count 2  as correct it gives error
my api response is wrapped within data, so i have used data below
        $response->assertJsonCount(2,'data');
    }

my seach keyword can be any thing such as ```upgrade,downgrade``` etc. 
upgrade is when ```current_price>previous_price``` and I have logic for that in controller 

My vue dev tool shows url as below:

    first:"https://localhost:800/users/plan?filter=upgrade&page=1"

In test I have passed params as``` getJson($url,['search'=>'upgrade']```
Is that the correct way to pass paramters?