diff --git a/tests/test_config.py b/tests/test_config.py
index d91f52c..1249125 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -87,20 +87,13 @@ class TestEmbedConfigEnvVar:
     """api_key 从环境变量读取."""
 
     def test_api_key_from_env(self, monkeypatch):
+        """从环境变量读取 API Key."""
         monkeypatch.setenv("EMBED_API_KEY", "sk-env-test")
-        import importlib
-        from src.core import config
-        importlib.reload(config)
-        cfg = config.EmbedConfig(mode="api")
+        cfg = EmbedConfig(mode="api")
         assert cfg.api_key == "sk-env-test"
-        # 清理
-        importlib.reload(config)
 
     def test_api_key_empty_when_not_set(self, monkeypatch):
+        """未设置时返回空字符串."""
         monkeypatch.delenv("EMBED_API_KEY", raising=False)
-        import importlib
-        from src.core import config
-        importlib.reload(config)
-        cfg = config.EmbedConfig(mode="api")
+        cfg = EmbedConfig(mode="api")
         assert cfg.api_key == ""
-        importlib.reload(config)