diff --git a/core/src/test/java/com/alibaba/fastjson2/v1issues/issue_1900/Issue1919.java b/core/src/test/java/com/alibaba/fastjson2/v1issues/issue_1900/Issue1919.java
index 3b24e2e35c..7d50cb6ac5 100644
--- a/core/src/test/java/com/alibaba/fastjson2/v1issues/issue_1900/Issue1919.java
+++ b/core/src/test/java/com/alibaba/fastjson2/v1issues/issue_1900/Issue1919.java
@@ -1,8 +1,12 @@
 package com.alibaba.fastjson2.v1issues.issue_1900;
 
 import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONObject;
+import com.alibaba.fastjson2.JSONWriter;
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 public class Issue1919 {
     @Test
     public void test() {
@@ -10,7 +14,8 @@ public void test() {
         for (int i = 0; i < 2500; i++) {
             buf.append('0');
         }
-        String a = buf.append("}").toString();
-        JSON.parseObject(a);
+        String str = buf.append("}").toString();
+        JSONObject jsonObject = JSON.parseObject(str);
+        assertEquals(str, jsonObject.toJSONString(JSONWriter.Feature.WriteBigDecimalAsPlain));
     }
 }