diff --git a/.gitignore b/.gitignore
index 039ba1956..67c2fa316 100644
--- a/.gitignore
+++ b/.gitignore
@@ -166,3 +166,4 @@ output
 tmp.png
 .dependencies.json
 tests/metagpt/utils/file_repo_git
+*.tmp
diff --git a/tests/metagpt/tools/test_ut_writer.py b/tests/metagpt/tools/test_ut_writer.py
index 2ae94885f..e31afa702 100644
--- a/tests/metagpt/tools/test_ut_writer.py
+++ b/tests/metagpt/tools/test_ut_writer.py
@@ -3,8 +3,11 @@
 """
 @Time    : 2023/4/30 21:44
 @Author  : alexanderwu
-@File    : test_ut_generator.py
+@File    : test_ut_writer.py
 """
+from pathlib import Path
+
+import pytest
 
 from metagpt.const import API_QUESTIONS_PATH, SWAGGER_PATH, UT_PY_PATH
 from metagpt.tools.ut_writer import YFT_PROMPT_PREFIX, UTGenerator
@@ -12,7 +15,10 @@ from metagpt.tools.ut_writer import YFT_PROMPT_PREFIX, UTGenerator
 
 class TestUTWriter:
     def test_api_to_ut_sample(self):
+        # Prerequisites
         swagger_file = SWAGGER_PATH / "yft_swaggerApi.json"
+        assert swagger_file.exists()
+
         tags = ["测试"]  # "智能合同导入", "律师审查", "ai合同审查", "草拟合同&律师在线审查", "合同审批", "履约管理", "签约公司"]
         # 这里在文件中手动加入了两个测试标签的API
 
@@ -25,3 +31,12 @@ class TestUTWriter:
         ret = utg.generate_ut(include_tags=tags)
         # 后续加入对文件生成内容与数量的检验
         assert ret
+
+        pathname = Path(__file__).with_suffix(".tmp")
+        utg.ask_gpt_and_save(question="question", tag="tag", fname=str(pathname))
+        assert pathname.exists()
+        pathname.unlink(missing_ok=True)
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-s"])