diff --git a/codec/src/test/java/io/netty/handler/codec/compression/Bzip2EncoderTest.java b/codec/src/test/java/io/netty/handler/codec/compression/Bzip2EncoderTest.java
index 466b455f79..295802e63f 100644
--- a/codec/src/test/java/io/netty/handler/codec/compression/Bzip2EncoderTest.java
+++ b/codec/src/test/java/io/netty/handler/codec/compression/Bzip2EncoderTest.java
@@ -54,7 +54,10 @@ public class Bzip2EncoderTest {
         assertEquals(9 + '0', out.readByte());
 
         out.release();
-        channel.finish();
+        assertTrue(channel.finish());
+        out = channel.readOutbound();
+        out.release();
+        assertNull(channel.readOutbound());
     }
 
     private static void testCompression(final byte[] data) throws Exception {