diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteAcceptorChannelTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteAcceptorChannelTest.java
index 1d0f3a36ed..1910600346 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteAcceptorChannelTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteAcceptorChannelTest.java
@@ -18,25 +18,17 @@ package io.netty.test.udt.nio;
 
 import io.netty.buffer.BufType;
 import io.netty.channel.udt.nio.NioUdtByteAcceptorChannel;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import static org.junit.Assert.*;
 
 public class NioUdtByteAcceptorChannelTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtByteAcceptorChannelTest.class);
-
     /**
      * verify channel meta data
      */
     @Test
     public void metadata() throws Exception {
-
-        assertEquals(BufType.BYTE, new NioUdtByteAcceptorChannel().metadata()
-                .bufferType());
-
+        assertEquals(BufType.BYTE, new NioUdtByteAcceptorChannel().metadata().bufferType());
     }
 }
diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteConnectorChannelTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteConnectorChannelTest.java
index 47edf48cf1..45c197bc86 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteConnectorChannelTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteConnectorChannelTest.java
@@ -18,26 +18,17 @@ package io.netty.test.udt.nio;
 
 import io.netty.buffer.BufType;
 import io.netty.channel.udt.nio.NioUdtByteConnectorChannel;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import static org.junit.Assert.*;
 
 public class NioUdtByteConnectorChannelTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtByteAcceptorChannelTest.class);
-
     /**
      * verify channel meta data
      */
     @Test
     public void metadata() throws Exception {
-
-        assertEquals(BufType.BYTE, new NioUdtByteConnectorChannel().metadata()
-                .bufferType());
-
+        assertEquals(BufType.BYTE, new NioUdtByteConnectorChannel().metadata().bufferType());
     }
-
 }
diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteRendezvousChannelTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteRendezvousChannelTest.java
index ea1f2ef852..a572dc84c6 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteRendezvousChannelTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteRendezvousChannelTest.java
@@ -22,13 +22,12 @@ import io.netty.bootstrap.Bootstrap;
 import io.netty.buffer.BufType;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.udt.nio.NioUdtByteRendezvousChannel;
+import io.netty.logging.InternalLogger;
+import io.netty.logging.InternalLoggerFactory;
 import io.netty.test.udt.util.BootHelp;
 import io.netty.test.udt.util.EchoByteHandler;
 import io.netty.test.udt.util.UnitHelp;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.net.InetSocketAddress;
 import java.util.concurrent.TimeUnit;
@@ -37,17 +36,14 @@ import static org.junit.Assert.*;
 
 public class NioUdtByteRendezvousChannelTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtByteAcceptorChannelTest.class);
+    private static final InternalLogger log = InternalLoggerFactory.getInstance(NioUdtByteAcceptorChannelTest.class);
 
     /**
      * verify channel meta data
      */
     @Test
     public void metadata() throws Exception {
-
-        assertEquals(BufType.BYTE, new NioUdtByteRendezvousChannel().metadata()
-                .bufferType());
-
+        assertEquals(BufType.BYTE, new NioUdtByteRendezvousChannel().metadata().bufferType());
     }
 
     /**
@@ -82,7 +78,7 @@ public class NioUdtByteRendezvousChannelTest extends AbstractUdtTest {
         while (handler1.meter().count() < transferLimit
                 && handler2.meter().count() < transferLimit) {
 
-            NioUdtByteAcceptorChannelTest.log.info("progress : {} {}", handler1.meter().count(), handler2
+            log.info("progress : {} {}", handler1.meter().count(), handler2
                     .meter().count());
 
             Thread.sleep(1000);
@@ -92,8 +88,8 @@ public class NioUdtByteRendezvousChannelTest extends AbstractUdtTest {
         connectFuture1.channel().close().sync();
         connectFuture2.channel().close().sync();
 
-        NioUdtByteAcceptorChannelTest.log.info("handler1 : {}", handler1.meter().count());
-        NioUdtByteAcceptorChannelTest.log.info("handler2 : {}", handler2.meter().count());
+        log.info("handler1 : {}", handler1.meter().count());
+        log.info("handler2 : {}", handler2.meter().count());
 
         assertTrue(handler1.meter().count() >= transferLimit);
         assertTrue(handler2.meter().count() >= transferLimit);
diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageAcceptorChannelTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageAcceptorChannelTest.java
index ebfc00fdd0..e7bdfe8089 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageAcceptorChannelTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageAcceptorChannelTest.java
@@ -18,26 +18,17 @@ package io.netty.test.udt.nio;
 
 import io.netty.buffer.BufType;
 import io.netty.channel.udt.nio.NioUdtMessageAcceptorChannel;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import static org.junit.Assert.*;
 
 public class NioUdtMessageAcceptorChannelTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtByteAcceptorChannelTest.class);
-
     /**
      * verify channel meta data
      */
     @Test
     public void metadata() throws Exception {
-
-        assertEquals(BufType.MESSAGE, new NioUdtMessageAcceptorChannel()
-                .metadata().bufferType());
-
+        assertEquals(BufType.MESSAGE, new NioUdtMessageAcceptorChannel().metadata().bufferType());
     }
-
 }
diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageConnectorChannelTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageConnectorChannelTest.java
index f26710b448..4d5d7fe473 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageConnectorChannelTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageConnectorChannelTest.java
@@ -18,26 +18,17 @@ package io.netty.test.udt.nio;
 
 import io.netty.buffer.BufType;
 import io.netty.channel.udt.nio.NioUdtMessageConnectorChannel;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import static org.junit.Assert.*;
 
 public class NioUdtMessageConnectorChannelTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtByteAcceptorChannelTest.class);
-
     /**
      * verify channel meta data
      */
     @Test
     public void metadata() throws Exception {
-
-        assertEquals(BufType.MESSAGE, new NioUdtMessageConnectorChannel()
-                .metadata().bufferType());
-
+        assertEquals(BufType.MESSAGE, new NioUdtMessageConnectorChannel().metadata().bufferType());
     }
-
 }
diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageRendezvousChannelTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageRendezvousChannelTest.java
index 78faf88317..f042a7d057 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageRendezvousChannelTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageRendezvousChannelTest.java
@@ -22,13 +22,12 @@ import io.netty.bootstrap.Bootstrap;
 import io.netty.buffer.BufType;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.udt.nio.NioUdtMessageRendezvousChannel;
+import io.netty.logging.InternalLogger;
+import io.netty.logging.InternalLoggerFactory;
 import io.netty.test.udt.util.BootHelp;
 import io.netty.test.udt.util.EchoMessageHandler;
 import io.netty.test.udt.util.UnitHelp;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.net.InetSocketAddress;
 import java.util.concurrent.TimeUnit;
@@ -37,16 +36,14 @@ import static org.junit.Assert.*;
 
 public class NioUdtMessageRendezvousChannelTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtByteAcceptorChannelTest.class);
+    private static final InternalLogger log = InternalLoggerFactory.getInstance(NioUdtByteAcceptorChannelTest.class);
 
     /**
      * verify channel meta data
      */
     @Test
     public void metadata() throws Exception {
-
-        assertEquals(BufType.MESSAGE, new NioUdtMessageRendezvousChannel()
-                .metadata().bufferType());
+        assertEquals(BufType.MESSAGE, new NioUdtMessageRendezvousChannel().metadata().bufferType());
 
     }
 
@@ -86,7 +83,7 @@ public class NioUdtMessageRendezvousChannelTest extends AbstractUdtTest {
         while (handler1.meter().count() < transferLimit
                 && handler2.meter().count() < transferLimit) {
 
-            NioUdtByteAcceptorChannelTest.log.info("progress : {} {}", handler1.meter().count(), handler2
+            log.info("progress : {} {}", handler1.meter().count(), handler2
                     .meter().count());
 
             Thread.sleep(1000);
@@ -96,8 +93,8 @@ public class NioUdtMessageRendezvousChannelTest extends AbstractUdtTest {
         connectFuture1.channel().close().sync();
         connectFuture2.channel().close().sync();
 
-        NioUdtByteAcceptorChannelTest.log.info("handler1 : {}", handler1.meter().count());
-        NioUdtByteAcceptorChannelTest.log.info("handler2 : {}", handler2.meter().count());
+        log.info("handler1 : {}", handler1.meter().count());
+        log.info("handler2 : {}", handler2.meter().count());
 
         assertTrue(handler1.meter().count() >= transferLimit);
         assertTrue(handler2.meter().count() >= transferLimit);
diff --git a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtProviderTest.java b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtProviderTest.java
index ee0879616a..e46b6eb6e3 100644
--- a/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtProviderTest.java
+++ b/transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtProviderTest.java
@@ -18,23 +18,17 @@ package io.netty.test.udt.nio;
 
 import io.netty.channel.udt.UdtServerChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
-
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import static org.junit.Assert.*;
 
 public class NioUdtProviderTest extends AbstractUdtTest {
 
-    protected static final Logger log = LoggerFactory.getLogger(NioUdtProviderTest.class);
-
     /**
      * verify factory
      */
     @Test
     public void provideFactory() {
-
         // bytes
         assertNotNull(NioUdtProvider.BYTE_ACCEPTOR.newChannel());
         assertNotNull(NioUdtProvider.BYTE_CONNECTOR.newChannel());
@@ -48,7 +42,5 @@ public class NioUdtProviderTest extends AbstractUdtTest {
         // acceptor types
         assertTrue(NioUdtProvider.BYTE_ACCEPTOR.newChannel() instanceof UdtServerChannel);
         assertTrue(NioUdtProvider.MESSAGE_ACCEPTOR.newChannel() instanceof UdtServerChannel);
-
     }
-
 }