diff --git a/broker/build.gradle b/broker/build.gradle
index 6c8ba3c8..4d53a222 100644
--- a/broker/build.gradle
+++ b/broker/build.gradle
@@ -13,7 +13,7 @@ dependencies {
     compile group: 'io.netty', name: 'netty-transport-native-epoll', version: nettyVersion, classifier: 'linux-x86_64'
     // <classifier>${os.detected.name}-${os.detected.arch}</classifier>
 
-    compile group: 'com.h2database', name: 'h2-mvstore', version: '1.4.192'
+    compile group: 'com.h2database', name: 'h2-mvstore', version: '1.4.196'
 
     compile group: 'com.zaxxer', name: 'HikariCP', version:'2.4.7'
 
@@ -33,7 +33,7 @@ dependencies {
     testCompile group: 'org.fusesource.mqtt-client', name: 'mqtt-client', version:'1.12'
     testCompile group: 'org.eclipse.paho', name: 'org.eclipse.paho.client.mqttv3', version:'1.2.0'
     testCompile group: 'org.eclipse.jetty.websocket', name: 'websocket-client', version:'9.2.0.M1'
-    testCompile group: 'com.h2database', name: 'h2', version:'1.4.192'
+    testCompile group: 'com.h2database', name: 'h2', version:'1.4.196'
 
     testRuntime group: 'io.netty', name: 'netty-tcnative', version: '2.0.10.Final', classifier: 'linux-x86_64'
 }
diff --git a/broker/src/main/java/io/moquette/broker/subscriptions/DumpTreeVisitor.java b/broker/src/main/java/io/moquette/broker/subscriptions/DumpTreeVisitor.java
index b98909e4..bf75d355 100644
--- a/broker/src/main/java/io/moquette/broker/subscriptions/DumpTreeVisitor.java
+++ b/broker/src/main/java/io/moquette/broker/subscriptions/DumpTreeVisitor.java
@@ -39,6 +39,7 @@ class DumpTreeVisitor implements CTrieSubscriptionDirectory.IVisitor<String> {
         for (Subscription couple : node.subscriptions) {
             subScriptionsStr
                 .append("{filter=").append(couple.topicFilter).append(", ")
+                .append("qos=").append(couple.getRequestedQos()).append(", ")
                 .append("client='").append(couple.clientId).append("'}");
             counter++;
             if (counter < node.subscriptions.size()) {
diff --git a/broker/src/test/java/io/moquette/integration/ServerIntegrationQoSValidationTest.java b/broker/src/test/java/io/moquette/integration/ServerIntegrationQoSValidationTest.java
index 97e23d16..ba7c00e0 100644
--- a/broker/src/test/java/io/moquette/integration/ServerIntegrationQoSValidationTest.java
+++ b/broker/src/test/java/io/moquette/integration/ServerIntegrationQoSValidationTest.java
@@ -21,16 +21,14 @@ import io.moquette.broker.config.IConfig;
 import io.moquette.broker.config.MemoryConfig;
 import org.eclipse.paho.client.mqttv3.IMqttClient;
 import org.eclipse.paho.client.mqttv3.MqttClient;
-import org.eclipse.paho.client.mqttv3.MqttClientPersistence;
 import org.eclipse.paho.client.mqttv3.MqttMessage;
-import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
 import org.junit.After;
 import org.junit.Before;
-import org.junit.BeforeClass;
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import java.io.File;
+
 import java.io.IOException;
 import java.util.Properties;
 
@@ -42,21 +40,12 @@ public class ServerIntegrationQoSValidationTest {
     private static final Logger LOG = LoggerFactory.getLogger(ServerIntegrationPahoTest.class);
 
     Server m_server;
-    static MqttClientPersistence s_subDataStore;
-    static MqttClientPersistence s_pubDataStore;
 
     IMqttClient m_subscriber;
     IMqttClient m_publisher;
     MessageCollector m_callback;
     IConfig m_config;
 
-    @BeforeClass
-    public static void beforeTests() {
-        String tmpDir = System.getProperty("java.io.tmpdir");
-        s_subDataStore = new MqttDefaultFilePersistence(tmpDir + File.separator + "subscriber");
-        s_pubDataStore = new MqttDefaultFilePersistence(tmpDir + File.separator + "publisher");
-    }
-
     protected void startServer() throws IOException {
         m_server = new Server();
         final Properties configProps = IntegrationUtils.prepareTestProperties();
@@ -68,12 +57,12 @@ public class ServerIntegrationQoSValidationTest {
     public void setUp() throws Exception {
         startServer();
 
-        m_subscriber = new MqttClient("tcp://localhost:1883", "Subscriber", s_subDataStore);
+        m_subscriber = new MqttClient("tcp://localhost:1883", "Subscriber", new MemoryPersistence());
         m_callback = new MessageCollector();
         m_subscriber.setCallback(m_callback);
         m_subscriber.connect();
 
-        m_publisher = new MqttClient("tcp://localhost:1883", "Publisher", s_pubDataStore);
+        m_publisher = new MqttClient("tcp://localhost:1883", "Publisher", new MemoryPersistence());
         m_publisher.connect();
     }
 
@@ -88,6 +77,7 @@ public class ServerIntegrationQoSValidationTest {
         }
 
         m_server.stopServer();
+        IntegrationUtils.clearTestStorage();
     }
 
     @Test