diff --git a/codec-dns/src/test/java/io/netty/handler/codec/dns/TcpDnsTest.java b/codec-dns/src/test/java/io/netty/handler/codec/dns/TcpDnsTest.java
index bcc49337ee..e4229ce1d1 100644
--- a/codec-dns/src/test/java/io/netty/handler/codec/dns/TcpDnsTest.java
+++ b/codec-dns/src/test/java/io/netty/handler/codec/dns/TcpDnsTest.java
@@ -68,6 +68,7 @@ public class TcpDnsTest {
         assertThat(readResponse.<DnsRawRecord>recordAt(DnsSection.ANSWER).content(), is(record.content()));
         ReferenceCountUtil.release(readResponse);
         ReferenceCountUtil.release(record);
+        query.release();
         assertFalse(channel.finish());
     }