diff --git a/tests/metagpt/provider/mock_llm_config.py b/tests/metagpt/provider/mock_llm_config.py
index 0f28ab54d..e2f626a6a 100644
--- a/tests/metagpt/provider/mock_llm_config.py
+++ b/tests/metagpt/provider/mock_llm_config.py
@@ -39,5 +39,6 @@ mock_llm_config_zhipu = LLMConfig(
     llm_type="zhipu",
     api_key="mock_api_key.zhipu",
     base_url="mock_base_url",
+    model="mock_zhipu_model",
     proxy="http://localhost:8080",
 )
diff --git a/tests/metagpt/test_config.py b/tests/metagpt/test_config.py
index 0785079fe..7ce5765cf 100644
--- a/tests/metagpt/test_config.py
+++ b/tests/metagpt/test_config.py
@@ -5,15 +5,10 @@
 @Author  : alexanderwu
 @File    : test_config.py
 """
-from pydantic import BaseModel
 
 from metagpt.config2 import Config
 from metagpt.configs.llm_config import LLMType
-from metagpt.context_mixin import ContextMixin
-from tests.metagpt.provider.mock_llm_config import (
-    mock_llm_config,
-    mock_llm_config_proxy,
-)
+from tests.metagpt.provider.mock_llm_config import mock_llm_config
 
 
 def test_config_1():
@@ -27,57 +22,3 @@ def test_config_from_dict():
     cfg = Config(llm=mock_llm_config)
     assert cfg
     assert cfg.llm.api_key == "mock_api_key"
-
-
-class ModelX(ContextMixin, BaseModel):
-    a: str = "a"
-    b: str = "b"
-
-
-class WTFMixin(BaseModel):
-    c: str = "c"
-    d: str = "d"
-
-
-class ModelY(WTFMixin, ModelX):
-    pass
-
-
-def test_config_mixin_1():
-    new_model = ModelX()
-    assert new_model.a == "a"
-    assert new_model.b == "b"
-
-
-def test_config_mixin_2():
-    i = Config(llm=mock_llm_config)
-    j = Config(llm=mock_llm_config_proxy)
-    obj = ModelX(config=i)
-    assert obj.config == i
-    assert obj.config.llm == mock_llm_config
-
-    obj.set_config(j)
-    # obj already has a config, so it will not be set
-    assert obj.config == i
-
-
-def test_config_mixin_3():
-    """Test config mixin with multiple inheritance"""
-    i = Config(llm=mock_llm_config)
-    j = Config(llm=mock_llm_config_proxy)
-    obj = ModelY(config=i)
-    assert obj.config == i
-    assert obj.config.llm == mock_llm_config
-
-    obj.set_config(j)
-    # obj already has a config, so it will not be set
-    assert obj.config == i
-    assert obj.config.llm == mock_llm_config
-
-    assert obj.a == "a"
-    assert obj.b == "b"
-    assert obj.c == "c"
-    assert obj.d == "d"
-
-    print(obj.__dict__.keys())
-    assert "private_config" in obj.__dict__.keys()
diff --git a/tests/metagpt/test_context_mixin.py b/tests/metagpt/test_context_mixin.py
new file mode 100644
index 000000000..4f261f4e9
--- /dev/null
+++ b/tests/metagpt/test_context_mixin.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+@Time    : 2024/1/11 19:24
+@Author  : alexanderwu
+@File    : test_context_mixin.py
+"""
+from pydantic import BaseModel
+
+from metagpt.config2 import Config
+from metagpt.context_mixin import ContextMixin
+from tests.metagpt.provider.mock_llm_config import (
+    mock_llm_config,
+    mock_llm_config_proxy,
+    mock_llm_config_zhipu,
+)
+
+
+class ModelX(ContextMixin, BaseModel):
+    a: str = "a"
+    b: str = "b"
+
+
+class WTFMixin(BaseModel):
+    c: str = "c"
+    d: str = "d"
+
+
+class ModelY(WTFMixin, ModelX):
+    pass
+
+
+def test_config_mixin_1():
+    new_model = ModelX()
+    assert new_model.a == "a"
+    assert new_model.b == "b"
+
+
+def test_config_mixin_2():
+    i = Config(llm=mock_llm_config)
+    j = Config(llm=mock_llm_config_proxy)
+    obj = ModelX(config=i)
+    assert obj.config == i
+    assert obj.config.llm == mock_llm_config
+
+    obj.set_config(j)
+    # obj already has a config, so it will not be set
+    assert obj.config == i
+
+
+def test_config_mixin_3_multi_inheritance_not_override_config():
+    """Test config mixin with multiple inheritance"""
+    i = Config(llm=mock_llm_config)
+    j = Config(llm=mock_llm_config_proxy)
+    obj = ModelY(config=i)
+    assert obj.config == i
+    assert obj.config.llm == mock_llm_config
+
+    obj.set_config(j)
+    # obj already has a config, so it will not be set
+    assert obj.config == i
+    assert obj.config.llm == mock_llm_config
+
+    assert obj.a == "a"
+    assert obj.b == "b"
+    assert obj.c == "c"
+    assert obj.d == "d"
+
+    print(obj.__dict__.keys())
+    assert "private_config" in obj.__dict__.keys()
+
+
+def test_config_mixin_4_multi_inheritance_override_config():
+    """Test config mixin with multiple inheritance"""
+    i = Config(llm=mock_llm_config)
+    j = Config(llm=mock_llm_config_zhipu)
+    obj = ModelY(config=i)
+    assert obj.config == i
+    assert obj.config.llm == mock_llm_config
+
+    obj.set_config(j, override=True)
+    # obj already has a config, so it will not be set
+    assert obj.config == j
+    assert obj.config.llm == mock_llm_config_zhipu
+
+    assert obj.a == "a"
+    assert obj.b == "b"
+    assert obj.c == "c"
+    assert obj.d == "d"
+
+    print(obj.__dict__.keys())
+    assert "private_config" in obj.__dict__.keys()
+    assert obj.llm.model == "mock_zhipu_model"