diff --git a/src/main/resources/standard-layout-djb.csv b/src/main/resources/standard-layout-djb.csv
index 11621d0..cc371f5 100644
--- a/src/main/resources/standard-layout-djb.csv
+++ b/src/main/resources/standard-layout-djb.csv
@@ -95,7 +95,7 @@ rprs_msg_cd,2,2,1,1,12,1,,,
 # ============================================================
 # EZDATA - 전자금융공통영역 (corp_tlwn_virt_brcd=ERP 조건부)
 # ============================================================
-EZDATA,1,3,1,1,0,1,HEAD.corp_tlwn_virt_brcd,ERP,
+EZDATA,1,3,0,1,0,1,HEAD.corp_tlwn_virt_brcd,ERP,
 login_mhod_dvcd,2,2,1,1,1,1,,,
 elfn_bnkn_dvcd,2,2,1,1,2,1,,,01
 usr_no,2,2,1,1,16,1,,,
diff --git a/src/test/java/com/eactive/eai/custom/message/StandardMessageEzdataJsonFlowTest.java b/src/test/java/com/eactive/eai/custom/message/StandardMessageEzdataJsonFlowTest.java
index d3e8567..74cf19d 100644
--- a/src/test/java/com/eactive/eai/custom/message/StandardMessageEzdataJsonFlowTest.java
+++ b/src/test/java/com/eactive/eai/custom/message/StandardMessageEzdataJsonFlowTest.java
@@ -17,6 +17,7 @@ import com.eactive.eai.common.monitor.EAIServiceMonitor;
 import com.eactive.eai.common.property.PropManager;
 import com.eactive.eai.common.server.EAIServerManager;
 import com.eactive.eai.common.util.ApplicationContextProvider;
+import com.eactive.eai.message.StandardItem;
 import com.eactive.eai.message.StandardMessage;
 import com.eactive.eai.message.manager.StandardMessageManager;
 import com.eactive.eai.message.parser.JsonReader;
@@ -243,27 +244,26 @@ class StandardMessageEzdataJsonFlowTest {
     }
 
     // ================================================================
-    // 3. EZDATA 조건 미충족(비ERP) — 입력값 미설정 검증
-    //    EZDATA 블록은 기본값으로 직렬화되므로, 입력 JSON에 없는 ERP 전용
-    //    필드(usr_no, rgsr_id 등)는 파싱 후 빈 값(기본값)이어야 함
+    // 3. EZDATA 조건 미충족(비ERP) — EZDATA 블록 직렬화 제외 검증
+    //    size=0 + refPath/refValue 조건 미충족 → isHidden=true → JSON 제외
     // ================================================================
 
     @Test
-    void 비ERP요청_파싱_EZDATA_usr_no_미설정() throws Exception {
+    void 비ERP요청_파싱_EZDATA_size_0() throws Exception {
         StandardMessage msg = parseNonErpReq();
 
-        String usrNo = msg.findItemValue("EZDATA.usr_no");
-        assertTrue(usrNo == null || usrNo.trim().isEmpty(),
-                "비ERP 요청에서 EZDATA.usr_no는 빈 값이어야 함: [" + usrNo + "]");
+        StandardItem ezdataItem = msg.findItem("EZDATA");
+        assertTrue(ezdataItem == null || ezdataItem.getSize() == 0,
+                "비ERP 요청에서 EZDATA 블록 size는 0이어야 함");
     }
 
     @Test
-    void 비ERP요청_파싱_EZDATA_rgsr_id_미설정() throws Exception {
+    void 비ERP요청_파싱_JSON_직렬화_EZDATA_제외() throws Exception {
         StandardMessage msg = parseNonErpReq();
 
-        String rgsrId = msg.findItemValue("EZDATA.rgsr_id");
-        assertTrue(rgsrId == null || rgsrId.trim().isEmpty(),
-                "비ERP 요청에서 EZDATA.rgsr_id는 빈 값이어야 함: [" + rgsrId + "]");
+        String json = msg.toJson(false, false);
+        JsonNode root = jacksonMapper.readTree(json);
+        assertFalse(root.has("EZDATA"), "비ERP 요청 직렬화 JSON에 EZDATA 블록이 없어야 함");
     }
 
     @Test