diff --git a/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/client/AbstractMqttClientConnectionTest.java b/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/client/AbstractMqttClientConnectionTest.java
index 116459e5e6..8c567e402c 100644
--- a/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/client/AbstractMqttClientConnectionTest.java
+++ b/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/client/AbstractMqttClientConnectionTest.java
@@ -34,7 +34,7 @@ public abstract class AbstractMqttClientConnectionTest extends AbstractMqttInteg
         try {
             client.connectAndWait("wrongAccessToken");
         } catch (MqttException e) {
-            Assert.assertEquals(MqttException.REASON_CODE_FAILED_AUTHENTICATION, e.getReasonCode());
+            Assert.assertEquals(MqttException.REASON_CODE_NOT_AUTHORIZED, e.getReasonCode());
         }
     }
 
diff --git a/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/credentials/BasicMqttCredentialsTest.java b/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/credentials/BasicMqttCredentialsTest.java
index 87337545fc..8f0dc24d7c 100644
--- a/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/credentials/BasicMqttCredentialsTest.java
+++ b/application/src/test/java/org/thingsboard/server/transport/mqtt/mqttv3/credentials/BasicMqttCredentialsTest.java
@@ -124,7 +124,7 @@ public class BasicMqttCredentialsTest extends AbstractMqttIntegrationTest {
             mqttTestClient.connectAndWait(USER_NAME3, "WRONG PASSWORD");
             Assert.fail(); // This should not happens, because we have a wrong password
         } catch (MqttException e) {
-            Assert.assertEquals(4, e.getReasonCode()); // 4 - Reason code for bad username or password in MQTT v3
+            Assert.assertEquals(5, e.getReasonCode()); // 4 - Reason code not authorized in MQTT v3
         }
         Assertions.assertThrows(MqttException.class, () -> {
             testTelemetryIsNotDelivered(clientIdAndUserNameAndPasswordDevice3, mqttTestClient);