diff --git a/akka-actor-typed-tests/src/test/java/jdocs/akka/typed/FaultToleranceDocTest.java b/akka-actor-typed-tests/src/test/java/jdocs/akka/typed/FaultToleranceDocTest.java
index b896a2df3d..b8e618a1d5 100644
--- a/akka-actor-typed-tests/src/test/java/jdocs/akka/typed/FaultToleranceDocTest.java
+++ b/akka-actor-typed-tests/src/test/java/jdocs/akka/typed/FaultToleranceDocTest.java
@@ -7,7 +7,10 @@ package jdocs.akka.typed;
 import akka.actor.typed.ActorRef;
 import akka.actor.typed.ActorSystem;
 import akka.actor.typed.Behavior;
+import akka.actor.typed.internal.adapter.ActorSystemAdapter;
 import akka.actor.typed.javadsl.Behaviors;
+import akka.testkit.javadsl.EventFilter;
+import com.typesafe.config.ConfigFactory;
 import org.junit.Test;
 import org.scalatest.junit.JUnitSuite;
 
@@ -27,10 +30,10 @@ public class FaultToleranceDocTest extends JUnitSuite {
   public void bubblingSample() {
     // #bubbling-example
     final Behavior<Message> failingChildBehavior = Behaviors.receive(Message.class)
-      .onMessage(Fail.class, (ctx, message) -> {
-        throw new RuntimeException(message.text);
-      })
-      .build();
+        .onMessage(Fail.class, (ctx, message) -> {
+          throw new RuntimeException(message.text);
+        })
+        .build();
 
     Behavior<Message> middleManagementBehavior = Behaviors.setup((ctx) -> {
       ctx.getLog().info("Middle management starting up");
@@ -43,11 +46,11 @@ public class FaultToleranceDocTest extends JUnitSuite {
       // when the child fails or stops gracefully this actor will
       // fail with a DeathWatchException
       return Behaviors.receive(Message.class)
-        .onMessage(Message.class, (innerCtx, msg) -> {
-          // just pass messages on to the child
-          child.tell(msg);
-          return Behaviors.same();
-        }).build();
+          .onMessage(Message.class, (innerCtx, msg) -> {
+            // just pass messages on to the child
+            child.tell(msg);
+            return Behaviors.same();
+          }).build();
     });
 
     Behavior<Message> bossBehavior = Behaviors.setup((ctx) -> {
@@ -59,17 +62,33 @@ public class FaultToleranceDocTest extends JUnitSuite {
       // when middle management fails with a DeathWatchException
       // this actor will also fail
       return Behaviors.receive(Message.class)
-        .onMessage(Message.class, (innerCtx, msg) -> {
-          // just pass messages on to the child
-          middleManagement.tell(msg);
-          return Behaviors.same();
-        }).build();
+          .onMessage(Message.class, (innerCtx, msg) -> {
+            // just pass messages on to the child
+            middleManagement.tell(msg);
+            return Behaviors.same();
+          }).build();
     });
 
+    {
+    // #bubbling-example
     final ActorSystem<Message> system =
-      ActorSystem.create(bossBehavior, "boss");
+        ActorSystem.create(bossBehavior, "boss");
+    // #bubbling-example
+    }
+    final ActorSystem<Message> system =
+        ActorSystem.create(bossBehavior, "boss", ConfigFactory.parseString(
+            "akka.loggers = [ akka.testkit.TestEventListener ]\n" +
+            "akka.loglevel=warning"));
 
+    // #bubbling-example
+    // actual exception and thent the deathpacts
+    new EventFilter(Exception.class, ActorSystemAdapter.toUntyped(system)).occurrences(4).intercept(() -> {
+    // #bubbling-example
     system.tell(new Fail("boom"));
+    // #bubbling-example
+      return null;
+    });
+    // #bubbling-example
     // this will now bubble up all the way to the boss and as that is the user guardian it means
     // the entire actor system will stop
 
diff --git a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/ActorContextSpec.scala b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/ActorContextSpec.scala
index e752c40450..33488aed20 100644
--- a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/ActorContextSpec.scala
+++ b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/ActorContextSpec.scala
@@ -12,6 +12,7 @@ import scala.concurrent.duration._
 import scala.reflect.ClassTag
 import akka.actor.testkit.typed.TestException
 import akka.actor.testkit.typed.scaladsl.ScalaTestWithActorTestKit
+import akka.testkit.EventFilter
 import org.scalatest.WordSpecLike
 
 object ActorSpecMessages {
@@ -62,7 +63,14 @@ object ActorSpecMessages {
 
 }
 
-abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecLike {
+abstract class ActorContextSpec extends ScalaTestWithActorTestKit(
+  """
+    akka.loggers = [akka.testkit.TestEventListener]
+  """) with WordSpecLike {
+
+  // FIXME eventfilter support in typed testkit
+  import scaladsl.adapter._
+  implicit val untypedSystem = system.toUntyped
 
   import ActorSpecMessages._
 
@@ -103,8 +111,11 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
       val actor = spawn(behavior)
       actor ! Ping
       probe.expectMessage(Pong)
-      actor ! Miss
-      probe.expectMessage(Missed)
+      // unhandled gives warning from EventFilter
+      EventFilter.warning(occurrences = 1).intercept {
+        actor ! Miss
+        probe.expectMessage(Missed)
+      }
       actor ! Renew(probe.ref)
       probe.expectMessage(Renewed)
       actor ! Ping
@@ -125,7 +136,9 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
 
       val behavior = Behaviors.supervise(internal).onFailure(SupervisorStrategy.restart)
       val actor = spawn(behavior)
-      actor ! Fail
+      EventFilter[TestException](occurrences = 1).intercept {
+        actor ! Fail
+      }
       probe.expectMessage(GotSignal(PreRestart))
     }
 
@@ -180,7 +193,9 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
 
       val parentRef = spawn(parent)
       val childRef = probe.expectMessageType[ChildMade].ref
-      childRef ! Fail
+      EventFilter[TestException](occurrences = 1).intercept {
+        childRef ! Fail
+      }
       probe.expectMessage(GotChildSignal(PreRestart))
       childRef ! Ping
       probe.expectMessage(Pong)
@@ -229,7 +244,9 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
       val actor = spawn(behavior)
       actor ! Ping
       probe.expectMessage(1)
-      actor ! Fail
+      EventFilter[TestException](occurrences = 1).intercept {
+        actor ! Fail
+      }
       actor ! Ping
       probe.expectMessage(1)
     }
@@ -251,7 +268,9 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
       val actor = spawn(behavior)
       actor ! Ping
       probe.expectMessage(1)
-      actor ! Fail
+      EventFilter[TestException](occurrences = 1).intercept {
+        actor ! Fail
+      }
       actor ! Ping
       probe.expectMessage(2)
     }
@@ -286,7 +305,9 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
       probe.expectMessage(Pong)
       watcher ! Ping
       probe.expectMessage(Pong)
-      actorToWatch ! Fail
+      EventFilter[TestException](occurrences = 1).intercept {
+        actorToWatch ! Fail
+      }
       probe.expectMessage(GotSignal(PostStop))
       probe.expectTerminated(actorToWatch, timeout.duration)
     }
@@ -320,7 +341,7 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
         case (_, Stop) ⇒
           Behaviors.stopped
       }.decorate
-      val actor: ActorRef[Command] = spawn(
+      spawn(
         Behaviors.setup[Command](ctx ⇒ {
           val childRef = ctx.spawn(child, "A")
           ctx.watch(childRef)
@@ -443,10 +464,12 @@ abstract class ActorContextSpec extends ScalaTestWithActorTestKit with WordSpecL
       val childRef = probe.expectMessageType[ChildMade].ref
       actor ! Inert
       probe.expectMessage(InertEvent)
-      childRef ! Stop
-      probe.expectMessage(GotChildSignal(PostStop))
-      probe.expectMessage(GotSignal(PostStop))
-      probe.expectTerminated(actor, timeout.duration)
+      EventFilter[DeathPactException](occurrences = 1).intercept {
+        childRef ! Stop
+        probe.expectMessage(GotChildSignal(PostStop))
+        probe.expectMessage(GotSignal(PostStop))
+        probe.expectTerminated(actor, timeout.duration)
+      }
     }
 
     "return the right context info" in {
diff --git a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/AskSpec.scala b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/AskSpec.scala
index b97a98ab83..589e64cbc2 100644
--- a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/AskSpec.scala
+++ b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/AskSpec.scala
@@ -8,11 +8,9 @@ import akka.actor.typed.internal.adapter.ActorSystemAdapter
 import akka.actor.typed.scaladsl.AskPattern._
 import akka.actor.typed.scaladsl.Behaviors
 import akka.actor.typed.scaladsl.Behaviors._
-import akka.actor.typed.scaladsl.adapter._
 import akka.testkit.EventFilter
 import akka.actor.testkit.typed.scaladsl.TestProbe
 import akka.util.Timeout
-import com.typesafe.config.ConfigFactory
 
 import scala.concurrent.duration._
 import scala.concurrent.{ ExecutionContext, TimeoutException }
@@ -26,11 +24,18 @@ object AskSpec {
   final case class Stop(replyTo: ActorRef[Unit]) extends Msg
 }
 
-class AskSpec extends ScalaTestWithActorTestKit(
-  "akka.loggers = [ akka.testkit.TestEventListener ]") with WordSpecLike {
+class AskSpec extends ScalaTestWithActorTestKit("""
+  akka.loglevel=warning
+  akka.loggers = [ akka.testkit.TestEventListener ]
+  """) with WordSpecLike {
 
+  // FIXME eventfilter support in typed testkit
   import AskSpec._
 
+  // FIXME eventfilter support in typed testkit
+  import scaladsl.adapter._
+  implicit val untypedSystem = system.toUntyped
+
   implicit def executor: ExecutionContext =
     system.executionContext
 
@@ -44,34 +49,39 @@ class AskSpec extends ScalaTestWithActorTestKit(
   }
 
   "Ask pattern" must {
-    "must fail the future if the actor is already terminated" in {
+    "fail the future if the actor is already terminated" in {
       val ref = spawn(behavior)
       (ref ? Stop).futureValue
       val probe = createTestProbe()
       probe.expectTerminated(ref, probe.remainingOrDefault)
-      val answer = ref ? Foo("bar")
+      val answer =
+        EventFilter.warning(pattern = ".*received dead letter.*", occurrences = 1).intercept {
+          ref ? Foo("bar")
+        }
       val result = answer.failed.futureValue
       result shouldBe a[TimeoutException]
       result.getMessage should include("had already been terminated.")
     }
 
-    "must succeed when the actor is alive" in {
+    "succeed when the actor is alive" in {
       val ref = spawn(behavior)
       val response = ref ? Foo("bar")
       response.futureValue should ===("foo")
     }
 
-    "must fail the future if the actor doesn't reply in time" in {
+    "fail the future if the actor doesn't reply in time" in {
       val actor = spawn(Behaviors.empty[Foo])
       implicit val timeout: Timeout = 10.millis
-      val answer = actor ? Foo("bar")
-      val result = answer.failed.futureValue
-      result shouldBe a[TimeoutException]
-      result.getMessage should startWith("Ask timed out on")
+      EventFilter.warning(pattern = ".*unhandled message.*", occurrences = 1).intercept {
+        val answer = actor ? Foo("bar")
+        val result = answer.failed.futureValue
+        result shouldBe a[TimeoutException]
+        result.getMessage should startWith("Ask timed out on")
+      }
     }
 
     /** See issue #19947 (MatchError with adapted ActorRef) */
-    "must fail the future if the actor doesn't exist" in {
+    "fail the future if the actor doesn't exist" in {
       val noSuchActor: ActorRef[Msg] = system match {
         case adaptedSys: ActorSystemAdapter[_] ⇒
           import akka.actor.typed.scaladsl.adapter._
@@ -80,13 +90,16 @@ class AskSpec extends ScalaTestWithActorTestKit(
           fail("this test must only run in an adapted actor system")
       }
 
-      val answer = noSuchActor ? Foo("bar")
+      val answer =
+        EventFilter.warning(pattern = ".*received dead letter.*", occurrences = 1).intercept {
+          noSuchActor ? Foo("bar")
+        }
       val result = answer.failed.futureValue
       result shouldBe a[TimeoutException]
       result.getMessage should include("had already been terminated")
     }
 
-    "must transform a replied akka.actor.Status.Failure to a failed future" in {
+    "transform a replied akka.actor.Status.Failure to a failed future" in {
       // It's unlikely but possible that this happens, since the receiving actor would
       // have to accept a message with an actoref that accepts AnyRef or be doing crazy casting
       // For completeness sake though
@@ -126,12 +139,14 @@ class AskSpec extends ScalaTestWithActorTestKit(
               case _ ⇒ "test"
             }
             Behavior.same
-          case (ctx, "test") ⇒
+          case (_, "test") ⇒
             probe.ref ! "got-test"
             Behavior.same
-          case (ctx, "get-state") ⇒
+          case (_, "get-state") ⇒
             probe.ref ! "running"
             Behavior.same
+          case (_, _) ⇒
+            Behavior.unhandled
         }
 
       val ref = spawn(behv)
diff --git a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/SupervisionSpec.scala b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/SupervisionSpec.scala
index 99cc90e7bb..fc287f5f7b 100644
--- a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/SupervisionSpec.scala
+++ b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/SupervisionSpec.scala
@@ -79,9 +79,6 @@ class StubbedSupervisionSpec extends WordSpec with Matchers {
 
   import SupervisionSpec._
 
-  def mkTestkit(behv: Behavior[Command]): BehaviorTestKit[Command] =
-    BehaviorTestKit(behv)
-
   "A restarter (stubbed)" must {
     "receive message" in {
       val inbox = TestInbox[Event]("evt")
@@ -235,7 +232,7 @@ class StubbedSupervisionSpec extends WordSpec with Matchers {
         inbox.ref ! Started
         targetBehavior(inbox.ref)
       }).onFailure[Exc1](SupervisorStrategy.restart)
-      mkTestkit(behv)
+      BehaviorTestKit(behv)
       // it's supposed to be created immediately (not waiting for first message)
       inbox.receiveMessage() should ===(Started)
     }
@@ -711,7 +708,7 @@ class SupervisionSpec extends ScalaTestWithActorTestKit(
         .onFailure[Exception](SupervisorStrategy.restart)
 
       EventFilter[ActorInitializationException](occurrences = 1).intercept {
-        val ref = spawn(behv)
+        spawn(behv)
         probe.expectMessage(Started) // first one before failure
       }
     }
diff --git a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/TimerSpec.scala b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/TimerSpec.scala
index 39678c7738..d6d4953561 100644
--- a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/TimerSpec.scala
+++ b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/TimerSpec.scala
@@ -13,10 +13,17 @@ import scala.util.control.NoStackTrace
 import akka.actor.testkit.typed.scaladsl._
 import akka.actor.typed.scaladsl.Behaviors
 import akka.actor.typed.scaladsl.TimerScheduler
-import akka.testkit.TimingTest
+import akka.testkit.{ EventFilter, TimingTest }
 import org.scalatest.WordSpecLike
 
-class TimerSpec extends ScalaTestWithActorTestKit with WordSpecLike {
+class TimerSpec extends ScalaTestWithActorTestKit(
+  """
+    akka.loggers = [ akka.testkit.TestEventListener ]
+  """) with WordSpecLike {
+
+  // FIXME eventfilter support in typed testkit
+  import scaladsl.adapter._
+  implicit val untypedSystem = system.toUntyped
 
   sealed trait Command
   case class Tick(n: Int) extends Command
@@ -165,14 +172,16 @@ class TimerSpec extends ScalaTestWithActorTestKit with WordSpecLike {
       probe.expectMessage(Tock(1))
 
       val latch = new CountDownLatch(1)
-      // next Tock(1) is enqueued in mailbox, but should be discarded by new incarnation
-      ref ! SlowThenThrow(latch, new Exc)
-      probe.expectNoMessage(interval + 100.millis.dilated)
-      latch.countDown()
-      probe.expectMessage(GotPreRestart(false))
-      probe.expectNoMessage(interval / 2)
-      probe.expectMessage(Tock(2))
+      EventFilter[Exc](occurrences = 1).intercept {
+        // next Tock(1) is enqueued in mailbox, but should be discarded by new incarnation
+        ref ! SlowThenThrow(latch, new Exc)
 
+        probe.expectNoMessage(interval + 100.millis.dilated)
+        latch.countDown()
+        probe.expectMessage(GotPreRestart(false))
+        probe.expectNoMessage(interval / 2)
+        probe.expectMessage(Tock(2))
+      }
       ref ! End
       probe.expectMessage(GotPostStop(false))
     }
@@ -191,13 +200,15 @@ class TimerSpec extends ScalaTestWithActorTestKit with WordSpecLike {
 
       probe.expectMessage(Tock(2))
 
-      val latch = new CountDownLatch(1)
-      // next Tock(2) is enqueued in mailbox, but should be discarded by new incarnation
-      ref ! SlowThenThrow(latch, new Exc)
-      probe.expectNoMessage(interval + 100.millis.dilated)
-      latch.countDown()
-      probe.expectMessage(GotPreRestart(false))
-      probe.expectMessage(Tock(1))
+      EventFilter[Exc](occurrences = 1).intercept {
+        val latch = new CountDownLatch(1)
+        // next Tock(2) is enqueued in mailbox, but should be discarded by new incarnation
+        ref ! SlowThenThrow(latch, new Exc)
+        probe.expectNoMessage(interval + 100.millis.dilated)
+        latch.countDown()
+        probe.expectMessage(GotPreRestart(false))
+        probe.expectMessage(Tock(1))
+      }
 
       ref ! End
       probe.expectMessage(GotPostStop(false))
@@ -210,8 +221,10 @@ class TimerSpec extends ScalaTestWithActorTestKit with WordSpecLike {
         target(probe.ref, timer, 1)
       }
       val ref = spawn(behv)
-      ref ! Throw(new Exc)
-      probe.expectMessage(GotPostStop(false))
+      EventFilter[Exc](occurrences = 1).intercept {
+        ref ! Throw(new Exc)
+        probe.expectMessage(GotPostStop(false))
+      }
     }
 
     "cancel timers when stopped voluntarily" taggedAs TimingTest in {
diff --git a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/scaladsl/adapter/AdapterSpec.scala b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/scaladsl/adapter/AdapterSpec.scala
index fcb8cdc482..9be81fe001 100644
--- a/akka-actor-typed-tests/src/test/scala/akka/actor/typed/scaladsl/adapter/AdapterSpec.scala
+++ b/akka-actor-typed-tests/src/test/scala/akka/actor/typed/scaladsl/adapter/AdapterSpec.scala
@@ -145,7 +145,10 @@ object AdapterSpec {
 
 }
 
-class AdapterSpec extends AkkaSpec {
+class AdapterSpec extends AkkaSpec(
+  """
+    akka.loggers = [akka.testkit.TestEventListener]
+  """) {
   import AdapterSpec._
 
   "ActorSystem adaption" must {
@@ -256,29 +259,40 @@ class AdapterSpec extends AkkaSpec {
       val ign = system.spawnAnonymous(Behaviors.ignore[Ping])
       val untypedRef = system.actorOf(untyped2(ign, probe.ref))
 
-      untypedRef ! "supervise-stop"
-      probe.expectMsg("thrown-stop")
-      // ping => ok should not get through here
-      probe.expectMsg("terminated")
+      EventFilter[AdapterSpec.ThrowIt1.type](occurrences = 1).intercept {
+        EventFilter.warning(pattern = """.*received dead letter.*""", occurrences = 1).intercept {
+          untypedRef ! "supervise-stop"
+          probe.expectMsg("thrown-stop")
+          // ping => ok should not get through here
+          probe.expectMsg("terminated")
+        }
+      }
 
       untypedRef ! "supervise-resume"
       probe.expectMsg("thrown-resume")
       probe.expectMsg("ok")
 
-      untypedRef ! "supervise-restart"
-      probe.expectMsg("thrown-restart")
-      probe.expectMsg("ok")
+      EventFilter[AdapterSpec.ThrowIt3.type](occurrences = 1).intercept {
+        untypedRef ! "supervise-restart"
+        probe.expectMsg("thrown-restart")
+        probe.expectMsg("ok")
+      }
     }
 
     "supervise untyped child from typed parent" in {
+      // FIXME there's a warning with null logged from the untyped empty child here, where does that come from?
       val probe = TestProbe()
       val ignore = system.actorOf(untyped.Props.empty)
       val typedRef = system.spawnAnonymous(typed1(ignore, probe.ref))
 
       // only stop supervisorStrategy
-      typedRef ! "supervise-stop"
-      probe.expectMsg("terminated")
-      probe.expectNoMsg(100.millis) // no pong
+      EventFilter[AdapterSpec.ThrowIt3.type](occurrences = 1).intercept {
+        EventFilter.warning(pattern = """.*received dead letter.*""", occurrences = 1).intercept {
+          typedRef ! "supervise-stop"
+          probe.expectMsg("terminated")
+          probe.expectNoMessage(100.millis) // no pong
+        }
+      }
     }
 
     "stop typed child from untyped parent" in {
diff --git a/akka-actor-typed-tests/src/test/scala/docs/akka/typed/coexistence/UntypedWatchingTypedSpec.scala b/akka-actor-typed-tests/src/test/scala/docs/akka/typed/coexistence/UntypedWatchingTypedSpec.scala
index 165fcc2bc1..c5a1d2cf46 100644
--- a/akka-actor-typed-tests/src/test/scala/docs/akka/typed/coexistence/UntypedWatchingTypedSpec.scala
+++ b/akka-actor-typed-tests/src/test/scala/docs/akka/typed/coexistence/UntypedWatchingTypedSpec.scala
@@ -4,6 +4,7 @@
 
 package docs.akka.typed.coexistence
 
+import akka.actor.ActorLogging
 import akka.actor.typed._
 import akka.actor.typed.scaladsl.Behaviors
 import akka.testkit.TestKit
@@ -25,7 +26,7 @@ object UntypedWatchingTypedSpec {
   }
 
   //#untyped-watch
-  class Untyped extends untyped.Actor {
+  class Untyped extends untyped.Actor with ActorLogging {
     // context.spawn is an implicit extension method
     val second: ActorRef[Typed.Command] =
       context.spawn(Typed.behavior, "second")
@@ -40,11 +41,11 @@ object UntypedWatchingTypedSpec {
 
     override def receive = {
       case Typed.Pong ⇒
-        println(s"$self got Pong from ${sender()}")
+        log.info(s"$self got Pong from ${sender()}")
         // context.stop is an implicit extension method
         context.stop(second)
       case untyped.Terminated(ref) ⇒
-        println(s"$self observed termination of $ref")
+        log.info(s"$self observed termination of $ref")
         context.stop(self)
     }
   }
@@ -60,7 +61,7 @@ object UntypedWatchingTypedSpec {
       Behaviors.receive { (ctx, msg) ⇒
         msg match {
           case Ping(replyTo) ⇒
-            println(s"${ctx.self} got Ping from $replyTo")
+            ctx.log.info(s"${ctx.self} got Ping from $replyTo")
             // replyTo is an untyped actor that has been converted for coexistence
             replyTo ! Pong
             Behaviors.same