diff --git a/broker/src/test/java/io/moquette/integration/mqtt5/RequestResponseTest.java b/broker/src/test/java/io/moquette/integration/mqtt5/RequestResponseTest.java
index 6005e63e9..161a1d3a5 100644
--- a/broker/src/test/java/io/moquette/integration/mqtt5/RequestResponseTest.java
+++ b/broker/src/test/java/io/moquette/integration/mqtt5/RequestResponseTest.java
@@ -81,17 +81,7 @@ private static void responderRepliesToRequesterPublish(Mqtt5BlockingClient respo
             });
 
         // wait for the SUBACK in 1 second, else if PUB is sent before the client is fully subscribed, then it's lost
-        try {
-            Mqtt5SubAck mqtt5SubAck = subackFuture.get(1, TimeUnit.SECONDS);
-            assertEquals(1, mqtt5SubAck.getReasonCodes().size());
-            assertEquals(Mqtt5SubAckReasonCode.GRANTED_QOS_1, mqtt5SubAck.getReasonCodes().iterator().next());
-        } catch (InterruptedException e) {
-            fail("Sub ack waiting interrupted before 1 sec expires");
-        } catch (ExecutionException e) {
-            throw new RuntimeException(e);
-        } catch (TimeoutException e) {
-            fail("Sub ack didn't arrive in 1 second timeout");
-        }
+        waitForSubAck(subackFuture);
 
         Mqtt5PublishResult.Mqtt5Qos1Result requestResult = (Mqtt5PublishResult.Mqtt5Qos1Result) requester.publishWith()
             .topic("requester/door/open")
@@ -123,7 +113,7 @@ public void givenRequestResponseProtocolWhenRequestIsIssueThenTheResponderReplyW
             .topicFilter("requester/door/open")
             .qos(MqttQos.AT_LEAST_ONCE)
             .build();
-        responder.toAsync().subscribe(subscribeToRequest,
+        CompletableFuture<@NotNull Mqtt5SubAck> subackFuture = responder.toAsync().subscribe(subscribeToRequest,
             (Mqtt5Publish pub) -> {
                 assertTrue(pub.getResponseTopic().isPresent(), "Response topic MUST defined in request publish");
                 assertTrue(pub.getCorrelationData().isPresent(), "Correlation data MUST defined in request publish");
@@ -134,6 +124,7 @@ public void givenRequestResponseProtocolWhenRequestIsIssueThenTheResponderReplyW
                     .send();
                 assertFalse(responseResult.getError().isPresent(), "Open door response cannot be published ");
             });
+        waitForSubAck(subackFuture);
 
         Mqtt5PublishResult.Mqtt5Qos1Result requestResult = (Mqtt5PublishResult.Mqtt5Qos1Result) requester.publishWith()
             .topic("requester/door/open")
@@ -155,6 +146,20 @@ public void givenRequestResponseProtocolWhenRequestIsIssueThenTheResponderReplyW
         });
     }
 
+    private static void waitForSubAck(CompletableFuture<@NotNull Mqtt5SubAck> subackFuture) {
+        try {
+            Mqtt5SubAck mqtt5SubAck = subackFuture.get(1, TimeUnit.SECONDS);
+            assertEquals(1, mqtt5SubAck.getReasonCodes().size());
+            assertEquals(Mqtt5SubAckReasonCode.GRANTED_QOS_1, mqtt5SubAck.getReasonCodes().iterator().next());
+        } catch (InterruptedException e) {
+            fail("Sub ack waiting interrupted before 1 sec expires");
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
+        } catch (TimeoutException e) {
+            fail("Sub ack didn't arrive in 1 second timeout");
+        }
+    }
+
     private byte[] asByteArray(ByteBuffer byteBuffer) {
         byte[] arr = new byte[byteBuffer.remaining()];
         byteBuffer.get(arr);