diff --git a/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java b/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java
index 8629aeae2..939efe258 100644
--- a/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java
+++ b/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java
@@ -63,7 +63,6 @@ public void testCMInt() {
         cm.setB(Short.MIN_VALUE);
         cm.setC(Integer.MIN_VALUE);
         cm.setD(Long.MIN_VALUE);
-        cm.setE('e');
         cm.setF("Hello Jaysunxiao，this is the World!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
 
         ByteBuf writeBuff = Unpooled.directBuffer();