diff --git a/codec-http2/src/test/java/io/netty/handler/codec/http2/LastInboundHandler.java b/codec-http2/src/test/java/io/netty/handler/codec/http2/LastInboundHandler.java
index 38f400af14..dcb9fb3d34 100644
--- a/codec-http2/src/test/java/io/netty/handler/codec/http2/LastInboundHandler.java
+++ b/codec-http2/src/test/java/io/netty/handler/codec/http2/LastInboundHandler.java
@@ -99,7 +99,7 @@ public class LastInboundHandler extends ChannelDuplexHandler {
 
     @Override
     public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {
-        if (writabilityStates == "") {
+        if ("".equals(writabilityStates)) {
             writabilityStates = String.valueOf(ctx.channel().isWritable());
         } else {
             writabilityStates += "," + ctx.channel().isWritable();