diff --git a/src/test/java/com/nhn/pinpoint/collector/dao/hbase/HbaseHostApplicationMapDaoTest.java b/src/test/java/com/nhn/pinpoint/collector/dao/hbase/HbaseHostApplicationMapDaoTest.java
index bccefd5ff..0449fcd85 100644
--- a/src/test/java/com/nhn/pinpoint/collector/dao/hbase/HbaseHostApplicationMapDaoTest.java
+++ b/src/test/java/com/nhn/pinpoint/collector/dao/hbase/HbaseHostApplicationMapDaoTest.java
@@ -4,6 +4,7 @@ import com.nhn.pinpoint.common.ServiceType;
 import com.nhn.pinpoint.common.buffer.Buffer;
 import com.nhn.pinpoint.common.buffer.FixedBuffer;
 import com.nhn.pinpoint.common.hbase.HBaseTables;
+import com.nhn.pinpoint.common.util.DefaultTimeSlot;
 import com.nhn.pinpoint.common.util.TimeSlot;
 import com.nhn.pinpoint.common.util.TimeUtils;
 import junit.framework.Assert;
@@ -18,11 +19,12 @@ public class HbaseHostApplicationMapDaoTest {
 
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
+    private final TimeSlot timeSlot = new DefaultTimeSlot();
 
     @Test
     public void testCreateRowKey() throws Exception {
         HbaseHostApplicationMapDao dao = new HbaseHostApplicationMapDao();
-        long statisticsRowSlot = TimeSlot.getStatisticsRowSlot(System.currentTimeMillis());
+        long statisticsRowSlot = timeSlot.getTimeSlot(System.currentTimeMillis());
         byte[] parentApps = dao.createRowKey("parentApp", ServiceType.TOMCAT.getCode(), statisticsRowSlot, null);
         logger.debug("rowKey size:{}", parentApps.length);
 
diff --git a/src/test/java/com/nhn/pinpoint/collector/receiver/udp/UDPReceiverTest.java b/src/test/java/com/nhn/pinpoint/collector/receiver/udp/UDPReceiverTest.java
index 341e6e48a..e41244d28 100644
--- a/src/test/java/com/nhn/pinpoint/collector/receiver/udp/UDPReceiverTest.java
+++ b/src/test/java/com/nhn/pinpoint/collector/receiver/udp/UDPReceiverTest.java
@@ -59,10 +59,10 @@ public class UDPReceiverTest {
     public void socketBufferSize() throws SocketException {
         DatagramSocket datagramSocket = new DatagramSocket();
         int receiveBufferSize = datagramSocket.getReceiveBufferSize();
-        System.out.println(receiveBufferSize);
+        logger.debug("{}", receiveBufferSize);
 
         datagramSocket.setReceiveBufferSize(64*1024*10);
-        System.out.println(datagramSocket.getReceiveBufferSize());
+        logger.debug("{}", datagramSocket.getReceiveBufferSize());
 
         datagramSocket.close();
     }