diff --git a/codec-socks/src/test/java/io/netty/handler/codec/socks/SocksCmdRequestDecoderTest.java b/codec-socks/src/test/java/io/netty/handler/codec/socks/SocksCmdRequestDecoderTest.java
index 0672453cd7..c72263ea08 100644
--- a/codec-socks/src/test/java/io/netty/handler/codec/socks/SocksCmdRequestDecoderTest.java
+++ b/codec-socks/src/test/java/io/netty/handler/codec/socks/SocksCmdRequestDecoderTest.java
@@ -19,7 +19,9 @@ import io.netty.channel.embedded.EmbeddedChannel;
 import io.netty.util.internal.logging.InternalLogger;
 import io.netty.util.internal.logging.InternalLoggerFactory;
 import org.junit.Test;
-import sun.net.util.IPAddressUtil;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
 
 import static org.junit.Assert.*;
 
@@ -62,8 +64,8 @@ public class SocksCmdRequestDecoderTest {
     }
 
     @Test
-    public void testCmdRequestDecoderIPv6() {
-        String[] hosts = {SocksCommonUtils.ipv6toStr(IPAddressUtil.textToNumericFormatV6("::1"))};
+    public void testCmdRequestDecoderIPv6() throws UnknownHostException {
+        String[] hosts = {SocksCommonUtils.ipv6toStr(InetAddress.getByName("::1").getAddress())};
         int[] ports = {1, 32769, 65535};
         for (SocksCmdType cmdType : SocksCmdType.values()) {
             for (String host : hosts) {
diff --git a/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/Socks5CommandRequestDecoderTest.java b/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/Socks5CommandRequestDecoderTest.java
index 728ee1eb7a..2cc9b43db6 100755
--- a/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/Socks5CommandRequestDecoderTest.java
+++ b/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/Socks5CommandRequestDecoderTest.java
@@ -20,9 +20,10 @@ import io.netty.util.NetUtil;
 import io.netty.util.internal.logging.InternalLogger;
 import io.netty.util.internal.logging.InternalLoggerFactory;
 import org.junit.Test;
-import sun.net.util.IPAddressUtil;
 
 import java.net.IDN;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
 import java.util.Arrays;
 
 import static org.junit.Assert.*;
@@ -65,9 +66,9 @@ public class Socks5CommandRequestDecoderTest {
     }
 
     @Test
-    public void testCmdRequestDecoderIPv6() {
+    public void testCmdRequestDecoderIPv6() throws UnknownHostException {
         String[] hosts = {
-                NetUtil.bytesToIpAddress(IPAddressUtil.textToNumericFormatV6("::1")) };
+                NetUtil.bytesToIpAddress(InetAddress.getByName("::1").getAddress()) };
         int[] ports = {1, 32769, 65535};
         for (Socks5CommandType cmdType: Arrays.asList(Socks5CommandType.BIND,
                                                       Socks5CommandType.CONNECT,