diff --git a/backend/unit_test/test_answer.py b/backend/unit_test/test_answer.py
index bb6ba7f..c094595 100644
--- a/backend/unit_test/test_answer.py
+++ b/backend/unit_test/test_answer.py
@@ -38,7 +38,6 @@ async def run_answer(prjflag:str,title:str,content:Dict[str,str], output_file:st
     outInfo = {f'{title}':results}
     with open(output_file, 'a', encoding='utf-8') as f:
         f.write(json.dumps(outInfo, ensure_ascii=False, indent=4))
-        f.write(',\n')
 
 # 主异步函数
 async def excute(prjflag:str,filePath:str,outFilePath:str):