Scala Akka TestKit Scalatest

import org.scalatest._
import akka.testkit._
import org.junit.runner.RunWith
import org.scalatest.junit.JUnitRunner
import akka.actor.ActorSystem

@RunWith(classOf[JUnitRunner])
class MyActor$Test extends FlatSpec with TestKitBase with ShouldMatchers {
  implicit lazy val system = ActorSystem()

  "MyActor" should "Receive a message to update stats" in {
    val actorRef = TestActorRef[MyActor]
    actorRef ! SomeMessageAsCaseClass()
  }

}