diff --git a/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala b/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala
index 7dca4afd9e..223619a4aa 100644
--- a/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala
+++ b/akka-actor-tests/src/test/scala/akka/dispatch/MailboxConfigSpec.scala
@@ -10,7 +10,7 @@ import org.scalatest.{ BeforeAndAfterEach, BeforeAndAfterAll }
 import com.typesafe.config.Config
 import akka.actor.{ RepointableRef, Props, DeadLetter, ActorSystem, ActorRefWithCell, ActorRef, ActorCell }
 import akka.testkit.AkkaSpec
-import akka.util.duration.intToDurationInt
+import scala.concurrent.util.duration.intToDurationInt
 
 @org.junit.runner.RunWith(classOf[org.scalatest.junit.JUnitRunner])
 abstract class MailboxSpec extends AkkaSpec with BeforeAndAfterAll with BeforeAndAfterEach {
diff --git a/akka-actor-tests/src/test/scala/akka/dispatch/PriorityDispatcherSpec.scala b/akka-actor-tests/src/test/scala/akka/dispatch/PriorityDispatcherSpec.scala
index 6a3130f592..670b6c023d 100644
--- a/akka-actor-tests/src/test/scala/akka/dispatch/PriorityDispatcherSpec.scala
+++ b/akka-actor-tests/src/test/scala/akka/dispatch/PriorityDispatcherSpec.scala
@@ -9,7 +9,7 @@ import com.typesafe.config.Config
 import akka.actor.{ Props, InternalActorRef, ActorSystem, Actor }
 import akka.pattern.ask
 import akka.testkit.{ DefaultTimeout, AkkaSpec }
-import akka.util.duration.intToDurationInt
+import scala.concurrent.util.duration.intToDurationInt
 
 object PriorityDispatcherSpec {
   val config = """
diff --git a/akka-actor-tests/src/test/scala/akka/routing/ConfiguredLocalRoutingSpec.scala b/akka-actor-tests/src/test/scala/akka/routing/ConfiguredLocalRoutingSpec.scala
index 3cd833a73f..81022fd618 100644
--- a/akka-actor-tests/src/test/scala/akka/routing/ConfiguredLocalRoutingSpec.scala
+++ b/akka-actor-tests/src/test/scala/akka/routing/ConfiguredLocalRoutingSpec.scala
@@ -12,7 +12,7 @@ import akka.ConfigurationException
 import akka.dispatch.Await
 import akka.pattern.{ ask, gracefulStop }
 import akka.testkit.{ TestLatch, ImplicitSender, DefaultTimeout, AkkaSpec }
-import akka.util.duration.intToDurationInt
+import scala.concurrent.util.duration.intToDurationInt
 import akka.actor.UnstartedCell
 
 object ConfiguredLocalRoutingSpec {
diff --git a/akka-durable-mailboxes/akka-mailboxes-common/src/test/scala/akka/actor/mailbox/DurableMailboxSpec.scala b/akka-durable-mailboxes/akka-mailboxes-common/src/test/scala/akka/actor/mailbox/DurableMailboxSpec.scala
index 56982f0315..0e156a5632 100644
--- a/akka-durable-mailboxes/akka-mailboxes-common/src/test/scala/akka/actor/mailbox/DurableMailboxSpec.scala
+++ b/akka-durable-mailboxes/akka-mailboxes-common/src/test/scala/akka/actor/mailbox/DurableMailboxSpec.scala
@@ -19,7 +19,7 @@ import DurableMailboxSpecActorFactory.{ MailboxTestActor, AccumulatorActor }
 import akka.actor.{ RepointableRef, Props, ActorSystem, ActorRefWithCell, ActorRef, ActorCell, Actor }
 import akka.dispatch.Mailbox
 import akka.testkit.TestKit
-import akka.util.duration.intToDurationInt
+import scala.concurrent.util.duration.intToDurationInt
 
 object DurableMailboxSpecActorFactory {
 
diff --git a/akka-testkit/src/main/scala/akka/testkit/CallingThreadDispatcher.scala b/akka-testkit/src/main/scala/akka/testkit/CallingThreadDispatcher.scala
index 69d81f7fb2..630a9b4c4a 100644
--- a/akka-testkit/src/main/scala/akka/testkit/CallingThreadDispatcher.scala
+++ b/akka-testkit/src/main/scala/akka/testkit/CallingThreadDispatcher.scala
@@ -12,7 +12,7 @@ import scala.annotation.tailrec
 import com.typesafe.config.Config
 import akka.actor.{ ActorInitializationException, ExtensionIdProvider, ExtensionId, Extension, ExtendedActorSystem, ActorRef, ActorCell }
 import akka.dispatch.{ MailboxType, TaskInvocation, SystemMessage, Suspend, Resume, MessageDispatcherConfigurator, MessageDispatcher, Mailbox, Envelope, DispatcherPrerequisites, DefaultSystemMessageQueue }
-import akka.util.duration.intToDurationInt
+import scala.concurrent.util.duration.intToDurationInt
 import akka.util.{ Switch, NonFatal }
 import scala.concurrent.util.Duration
 import akka.actor.ActorContext