diff --git a/akka-http-core/src/test/scala/akka/http/scaladsl/TestServer.scala b/akka-http-core/src/test/scala/akka/http/scaladsl/TestServer.scala
index aab2cd04c7..7a62627e83 100644
--- a/akka-http-core/src/test/scala/akka/http/scaladsl/TestServer.scala
+++ b/akka-http-core/src/test/scala/akka/http/scaladsl/TestServer.scala
@@ -18,6 +18,7 @@ object TestServer extends App {
   val testConf: Config = ConfigFactory.parseString("""
     akka.loglevel = INFO
     akka.log-dead-letters = off
+    akka.stream.materializer.debug.fuzzing-mode = off
     """)
   implicit val system = ActorSystem("ServerTest", testConf)
   implicit val fm = ActorMaterializer()
diff --git a/akka-http-tests/src/test/scala/akka/http/scaladsl/server/TestServer.scala b/akka-http-tests/src/test/scala/akka/http/scaladsl/server/TestServer.scala
index 604caee07e..f7ee4efaad 100644
--- a/akka-http-tests/src/test/scala/akka/http/scaladsl/server/TestServer.scala
+++ b/akka-http-tests/src/test/scala/akka/http/scaladsl/server/TestServer.scala
@@ -15,7 +15,9 @@ import akka.http.scaladsl.Http
 object TestServer extends App {
   val testConf: Config = ConfigFactory.parseString("""
     akka.loglevel = INFO
-    akka.log-dead-letters = off""")
+    akka.log-dead-letters = off
+    akka.stream.materializer.debug.fuzzing-mode = off
+    """)
   implicit val system = ActorSystem("ServerTest", testConf)
   import system.dispatcher
   implicit val materializer = ActorMaterializer()
diff --git a/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala b/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala
index f9360aed43..4b5dbb9848 100644
--- a/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala
+++ b/akka-stream/src/main/scala/akka/stream/impl/ActorMaterializerImpl.scala
@@ -37,7 +37,7 @@ private[akka] case class ActorMaterializerImpl(system: ActorSystem,
 
   if (settings.fuzzingMode) {
     _logger.warning("Fuzzing mode is enabled on this system. If you see this warning on your production system then " +
-      "set akka.materializer.debug.fuzzing-mode to off.")
+      "set akka.stream.materializer.debug.fuzzing-mode to off.")
   }
 
   override def shutdown(): Unit =