tested if a different clenup order can fix `Promise resolution is still pending but the event loop has already resolved`

test/backend-test/test-mqtt.js

@@ -44,11 +44,11 @@ function testMqtt(mqttSuccessMessage, mqttCheckType, receivedMessage, onSuccess,
             status: PENDING,
         };
         mqttMonitorType.check(monitor, heartbeat, {})
-            .then(() => onSuccess(heartbeat), onError)
-            .finally(() => {
+            .then(()=>{
                 testMqttClient.end();
                 hiveMQContainer.stop();
-            });
+            })
+            .then(() => onSuccess(heartbeat), onError)
 
         const testMqttClient = mqtt.connect(hiveMQContainer.getConnectionString());
         testMqttClient.on("connect", () => {