diff --git a/codec-redis/src/test/java/io/netty/handler/codec/redis/RedisEncoderTest.java b/codec-redis/src/test/java/io/netty/handler/codec/redis/RedisEncoderTest.java
index 32803f4ee1..d880db2e7b 100644
--- a/codec-redis/src/test/java/io/netty/handler/codec/redis/RedisEncoderTest.java
+++ b/codec-redis/src/test/java/io/netty/handler/codec/redis/RedisEncoderTest.java
@@ -175,6 +175,7 @@ public class RedisEncoderTest {
         ByteBuf read;
         while ((read = channel.readOutbound()) != null) {
             buf.writeBytes(read);
+            read.release();
         }
         return buf;
     }