diff --git a/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/DefaultSocks5CommandResponseTest.java b/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/DefaultSocks5CommandResponseTest.java
index 79717b36c2..36fea75027 100755
--- a/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/DefaultSocks5CommandResponseTest.java
+++ b/codec-socks/src/test/java/io/netty/handler/codec/socksx/v5/DefaultSocks5CommandResponseTest.java
@@ -57,6 +57,7 @@ public class DefaultSocks5CommandResponseTest {
                 0x00
         };
         assertByteBufEquals(expected, buffer);
+        buffer.release();
     }
 
     /**
@@ -83,6 +84,7 @@ public class DefaultSocks5CommandResponseTest {
                 0x50
                 };
         assertByteBufEquals(expected, buffer);
+        buffer.release();
     }
 
     /**
@@ -106,6 +108,7 @@ public class DefaultSocks5CommandResponseTest {
                 0x50
         };
         assertByteBufEquals(expected, buffer);
+        buffer.release();
     }
 
     /**