diff --git a/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientMockTest.scala b/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientMockTest.scala
index e4897aea2..d21319320 100644
--- a/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientMockTest.scala
+++ b/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientMockTest.scala
@@ -24,7 +24,7 @@ class AkkaHttpClientMockTest
 
   private implicit lazy val system: ActorSystem = ActorSystem()
 
-  override def afterAll: Unit = {
+  override def afterAll(): Unit = {
     system.terminate()
   }
 
diff --git a/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientTest.scala b/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientTest.scala
index 85926e8a8..ee86f4806 100644
--- a/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientTest.scala
+++ b/elastic4s-client-akka/src/test/scala/com/sksamuel/elastic4s/akka/AkkaHttpClientTest.scala
@@ -17,7 +17,7 @@ class AkkaHttpClientTest extends AnyFlatSpec with Matchers with DockerTests with
 
   private implicit lazy val system: ActorSystem = ActorSystem()
 
-  override def beforeAll: Unit = {
+  override def beforeAll(): Unit = {
     Try {
       client.execute {
         deleteIndex("testindex")
@@ -25,7 +25,7 @@ class AkkaHttpClientTest extends AnyFlatSpec with Matchers with DockerTests with
     }
   }
 
-  override def afterAll: Unit = {
+  override def afterAll(): Unit = {
     Try {
       client.execute {
         deleteIndex("testindex")
diff --git a/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientMockTest.scala b/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientMockTest.scala
index b8879d093..76a29fe97 100644
--- a/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientMockTest.scala
+++ b/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientMockTest.scala
@@ -24,7 +24,7 @@ class PekkoHttpClientMockTest
 
   private implicit lazy val system: ActorSystem = ActorSystem()
 
-  override def afterAll: Unit = {
+  override def afterAll(): Unit = {
     system.terminate()
   }
 
diff --git a/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientTest.scala b/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientTest.scala
index e1070b594..4393b8a9c 100644
--- a/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientTest.scala
+++ b/elastic4s-client-pekko/src/test/scala/com/sksamuel/elastic4s/pekko/PekkoHttpClientTest.scala
@@ -17,7 +17,7 @@ class PekkoHttpClientTest extends AnyFlatSpec with Matchers with DockerTests wit
 
   private implicit lazy val system: ActorSystem = ActorSystem()
 
-  override def beforeAll: Unit = {
+  override def beforeAll(): Unit = {
     Try {
       client.execute {
         deleteIndex("testindex")
@@ -25,7 +25,7 @@ class PekkoHttpClientTest extends AnyFlatSpec with Matchers with DockerTests wit
     }
   }
 
-  override def afterAll: Unit = {
+  override def afterAll(): Unit = {
     Try {
       client.execute {
         deleteIndex("testindex")