diff --git a/metagpt/actions/write_docstring.py b/metagpt/actions/write_docstring.py
index 68856c360..728b49fab 100644
--- a/metagpt/actions/write_docstring.py
+++ b/metagpt/actions/write_docstring.py
@@ -21,7 +21,10 @@ Example:
 This script uses the 'fire' library to create a command-line interface. It generates docstrings for the given Python code using
 the specified docstring style and adds them to the code.
 """
+from __future__ import annotations
+
 import ast
+from pathlib import Path
 from typing import Literal, Optional
 
 from pydantic import Field
@@ -29,7 +32,7 @@ from pydantic import Field
 from metagpt.actions.action import Action
 from metagpt.llm import LLM
 from metagpt.provider.base_llm import BaseLLM
-from metagpt.utils.common import OutputParser
+from metagpt.utils.common import OutputParser, aread, awrite
 from metagpt.utils.pycst import merge_docstring
 
 PYTHON_DOCSTRING_SYSTEM = """### Requirements
@@ -187,6 +190,16 @@ class WriteDocstring(Action):
         documented_code = OutputParser.parse_python_code(documented_code)
         return merge_docstring(code, documented_code)
 
+    @staticmethod
+    async def write_docstring(
+        filename: str | Path, overwrite: bool = False, style: Literal["google", "numpy", "sphinx"] = "google"
+    ) -> str:
+        data = await aread(str(filename))
+        code = await WriteDocstring().run(data, style=style)
+        if overwrite:
+            await awrite(filename, code)
+        return code
+
 
 def _simplify_python_code(code: str) -> None:
     """Simplifies the given Python code by removing expressions and the last if statement.
@@ -207,13 +220,4 @@ def _simplify_python_code(code: str) -> None:
 if __name__ == "__main__":
     import fire
 
-    async def run(filename: str, overwrite: bool = False, style: Literal["google", "numpy", "sphinx"] = "google"):
-        with open(filename) as f:
-            code = f.read()
-        code = await WriteDocstring().run(code, style=style)
-        if overwrite:
-            with open(filename, "w") as f:
-                f.write(code)
-        return code
-
-    fire.Fire(run)
+    fire.Fire(WriteDocstring.write_docstring)
diff --git a/tests/data/demo_project/prd.json b/tests/data/demo_project/prd.json
new file mode 100644
index 000000000..2dd26b384
--- /dev/null
+++ b/tests/data/demo_project/prd.json
@@ -0,0 +1 @@
+{"Language": "en_us", "Programming Language": "Python", "Original Requirements": "write a 2048 game", "Project Name": "game_2048", "Product Goals": ["Create an addictive and engaging gaming experience", "Ensure smooth performance and responsiveness", "Offer customizable game settings and features"], "User Stories": ["As a player, I want to be able to play the game on different devices and screen sizes", "As a gamer, I want to be challenged with increasing difficulty levels as I progress", "As a user, I want to be able to undo my last move in the game"], "Competitive Analysis": ["2048 Game by Gabriele Cirulli: Popular and addictive, lacks advanced customization options"], "Competitive Quadrant Chart": "quadrantChart\n    title \"Engagement and Customization of 2048 Games\"\n    x-axis \"Low Customization\" --> \"High Customization\"\n    y-axis \"Low Engagement\" --> \"High Engagement\"\n    quadrant-1 \"Enhance Customization\"\n    quadrant-2 \"Improve Engagement\"\n    quadrant-3 \"Maintain Customization, Enhance Engagement\"\n    quadrant-4 \"Highly Engaging and Customizable\"\n    \"2048 Game by Gabriele Cirulli\": [0.4, 0.7]\n    \"Our Target Product\": [0.6, 0.8]", "Requirement Analysis": "The product should provide an intuitive and seamless gaming experience with customizable features to enhance user engagement.", "Requirement Pool": [["P0", "Implement game logic and user interface"], ["P1", "Incorporate multiple difficulty levels and scoring system"], ["P2", "Integrate customizable game settings and undo feature"]], "UI Design draft": "The UI should have a clean and modern design with intuitive game controls and customizable settings for difficulty levels and game themes.", "Anything UNCLEAR": "..."}
\ No newline at end of file
diff --git a/tests/metagpt/actions/test_write_docstring.py b/tests/metagpt/actions/test_write_docstring.py
index a8a80b36d..a0fc46ebd 100644
--- a/tests/metagpt/actions/test_write_docstring.py
+++ b/tests/metagpt/actions/test_write_docstring.py
@@ -30,3 +30,13 @@ class Person:
 async def test_write_docstring(style: str, part: str):
     ret = await WriteDocstring().run(code, style=style)
     assert part in ret
+
+
+@pytest.mark.asyncio
+async def test_write():
+    code = await WriteDocstring.write_docstring(__file__)
+    assert code
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-s"])
diff --git a/tests/metagpt/actions/test_write_prd_review.py b/tests/metagpt/actions/test_write_prd_review.py
index 5077fa465..9b3f0a285 100644
--- a/tests/metagpt/actions/test_write_prd_review.py
+++ b/tests/metagpt/actions/test_write_prd_review.py
@@ -23,10 +23,14 @@ async def test_write_prd_review():
     Timeline: The feature should be ready for testing in 1.5 months.
     """
 
-    write_prd_review = WritePRDReview("write_prd_review")
+    write_prd_review = WritePRDReview(name="write_prd_review")
 
     prd_review = await write_prd_review.run(prd)
 
     # We cannot exactly predict the generated PRD review, but we can check if it is a string and if it is not empty
     assert isinstance(prd_review, str)
     assert len(prd_review) > 0
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-s"])
diff --git a/tests/metagpt/actions/test_write_teaching_plan.py b/tests/metagpt/actions/test_write_teaching_plan.py
index 3f25b2167..57a4f5eb0 100644
--- a/tests/metagpt/actions/test_write_teaching_plan.py
+++ b/tests/metagpt/actions/test_write_teaching_plan.py
@@ -6,53 +6,21 @@
 @File    : test_write_teaching_plan.py
 """
 
-import asyncio
-from typing import Optional
-
-from langchain.llms.base import LLM
-from pydantic import BaseModel
+import pytest
 
 from metagpt.actions.write_teaching_plan import WriteTeachingPlanPart
-from metagpt.config import Config
-from metagpt.schema import Message
 
 
-class MockWriteTeachingPlanPart(WriteTeachingPlanPart):
-    def __init__(self, options, name: str = "", context=None, llm: LLM = None, topic="", language="Chinese"):
-        super().__init__(options, name, context, llm, topic, language)
-
-    async def _aask(self, prompt: str, system_msgs: Optional[list[str]] = None) -> str:
-        return f"{WriteTeachingPlanPart.DATA_BEGIN_TAG}\nprompt\n{WriteTeachingPlanPart.DATA_END_TAG}"
-
-
-async def mock_write_teaching_plan_part():
-    class Inputs(BaseModel):
-        input: str
-        name: str
-        topic: str
-        language: str
-
-    inputs = [
-        {"input": "AABBCC", "name": "A", "topic": WriteTeachingPlanPart.COURSE_TITLE, "language": "C"},
-        {"input": "DDEEFFF", "name": "A1", "topic": "B1", "language": "C1"},
-    ]
-
-    for i in inputs:
-        seed = Inputs(**i)
-        options = Config().runtime_options
-        act = MockWriteTeachingPlanPart(options=options, name=seed.name, topic=seed.topic, language=seed.language)
-        await act.run([Message(content="")])
-        assert act.topic == seed.topic
-        assert str(act) == seed.topic
-        assert act.name == seed.name
-        assert act.rsp == "# prompt" if seed.topic == WriteTeachingPlanPart.COURSE_TITLE else "prompt"
-
-
-def test_suite():
-    loop = asyncio.get_event_loop()
-    task = loop.create_task(mock_write_teaching_plan_part())
-    loop.run_until_complete(task)
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    ("topic", "context"),
+    [("Title", "Lesson 1: Learn to draw an apple."), ("Teaching Content", "Lesson 1: Learn to draw an apple.")],
+)
+async def test_write_teaching_plan_part(topic, context):
+    action = WriteTeachingPlanPart(topic=topic, context=context)
+    rsp = await action.run()
+    assert rsp
 
 
 if __name__ == "__main__":
-    test_suite()
+    pytest.main([__file__, "-s"])
diff --git a/tests/metagpt/learn/test_text_to_image.py b/tests/metagpt/learn/test_text_to_image.py
index a6cbc45bf..626945218 100644
--- a/tests/metagpt/learn/test_text_to_image.py
+++ b/tests/metagpt/learn/test_text_to_image.py
@@ -7,35 +7,26 @@
 @Desc    : Unit tests.
 """
 
-import base64
 
 import pytest
-from pydantic import BaseModel
 
+from metagpt.config import CONFIG
 from metagpt.learn.text_to_image import text_to_image
 
 
 @pytest.mark.asyncio
 async def test():
-    class Input(BaseModel):
-        input: str
-        size_type: str
+    # Prerequisites
+    assert CONFIG.METAGPT_TEXT_TO_IMAGE_MODEL_URL
+    assert CONFIG.OPENAI_API_KEY
 
-    inputs = [{"input": "Panda emoji", "size_type": "512x512"}]
-
-    for i in inputs:
-        seed = Input(**i)
-        base64_data = await text_to_image(seed.input)
-        assert base64_data != ""
-        print(f"{seed.input} -> {base64_data}")
-        flags = ";base64,"
-        assert flags in base64_data
-        ix = base64_data.find(flags) + len(flags)
-        declaration = base64_data[0:ix]
-        assert declaration
-        data = base64_data[ix:]
-        assert data
-        assert base64.b64decode(data, validate=True)
+    data = await text_to_image("Panda emoji", size_type="512x512")
+    assert "base64" in data or "http" in data
+    key = CONFIG.METAGPT_TEXT_TO_IMAGE_MODEL_URL
+    CONFIG.METAGPT_TEXT_TO_IMAGE_MODEL_URL = None
+    data = await text_to_image("Panda emoji", size_type="512x512")
+    assert "base64" in data or "http" in data
+    CONFIG.METAGPT_TEXT_TO_IMAGE_MODEL_URL = key
 
 
 if __name__ == "__main__":
diff --git a/tests/metagpt/provider/test_azure_openai_api.py b/tests/metagpt/provider/test_azure_openai_api.py
new file mode 100644
index 000000000..a1f1effeb
--- /dev/null
+++ b/tests/metagpt/provider/test_azure_openai_api.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+@Time    : 2023/12/28
+@Author  : mashenquan
+@File    : test_azure_openai.py
+"""
+from metagpt.config import CONFIG, LLMProviderEnum
+from metagpt.llm import LLM
+
+
+def test_llm():
+    # Prerequisites
+    assert CONFIG.DEPLOYMENT_NAME and CONFIG.DEPLOYMENT_NAME != "YOUR_DEPLOYMENT_NAME"
+    assert CONFIG.OPENAI_API_KEY and CONFIG.OPENAI_API_KEY != "YOUR_AZURE_API_KEY"
+    assert CONFIG.OPENAI_API_VERSION
+    assert CONFIG.OPENAI_BASE_URL
+
+    llm = LLM(provider=LLMProviderEnum.AZURE_OPENAI)
+    assert llm
diff --git a/tests/metagpt/provider/test_metagpt_api.py b/tests/metagpt/provider/test_metagpt_api.py
new file mode 100644
index 000000000..1f00cb653
--- /dev/null
+++ b/tests/metagpt/provider/test_metagpt_api.py
@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+@Time    : 2023/12/28
+@Author  : mashenquan
+@File    : test_metagpt_api.py
+"""
+from metagpt.config import LLMProviderEnum
+from metagpt.llm import LLM
+
+
+def test_llm():
+    llm = LLM(provider=LLMProviderEnum.METAGPT)
+    assert llm
diff --git a/tests/metagpt/provider/test_open_llm_api.py b/tests/metagpt/provider/test_open_llm_api.py
new file mode 100644
index 000000000..b8be68504
--- /dev/null
+++ b/tests/metagpt/provider/test_open_llm_api.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+@Time    : 2023/12/28
+@Author  : mashenquan
+@File    : test_open_llm_api.py
+"""
+from metagpt.config import CONFIG, LLMProviderEnum
+from metagpt.llm import LLM
+from metagpt.provider.open_llm_api import OpenLLMCostManager
+
+
+def test_llm():
+    llm = LLM(provider=LLMProviderEnum.OPEN_LLM)
+    assert llm
+
+
+def test_cost():
+    # Prerequisites
+    CONFIG.max_budget = 10
+
+    cost = OpenLLMCostManager()
+    cost.update_cost(prompt_tokens=10, completion_tokens=1, model="gpt-35-turbo")
+    assert cost.get_total_prompt_tokens() > 0
+    assert cost.get_total_completion_tokens() > 0
diff --git a/tests/metagpt/utils/test_s3.py b/tests/metagpt/utils/test_s3.py
index e4154b957..0a654f2da 100644
--- a/tests/metagpt/utils/test_s3.py
+++ b/tests/metagpt/utils/test_s3.py
@@ -45,9 +45,11 @@ async def test_s3():
 @pytest.mark.asyncio
 async def test_s3_no_error():
     conn = S3()
+    key = conn.auth_config["aws_secret_access_key"]
     conn.auth_config["aws_secret_access_key"] = ""
     res = await conn.cache("ABC", ".bak", "script")
     assert not res
+    conn.auth_config["aws_secret_access_key"] = key
 
 
 if __name__ == "__main__":