How to override tags to tag scopes in ScalaTest 2.0

gistfile1.txt

import org.scalatest._
import Matchers._
import tagobjects._

class ExampleSpec extends FreeSpec {

    override lazy val tags: Map[String, Set[String]] =
      super.tags.transform {
        case (testName, tagsSet) if testName startsWith "scope1" => tagsSet + "Scope1"
        case (testName, tagsSet) if testName startsWith "scope2" => tagsSet + "Scope2"
        case (_, existingSet) => existingSet
      }

    "scope1" - {
      "slow" taggedAs Slow in {
        1 + 1 shouldEqual 2
      }
      "disk" taggedAs Disk in {
        1 + 1 shouldEqual 2
      }
    }
    "scope2" - {
      "network" taggedAs Network in {
        1 + 1 shouldEqual 2
      }
      "cpu" taggedAs CPU in {
        1 + 1 shouldEqual 2
      }
    }
  }