diff --git a/tests/unit/test_config_oss.py b/tests/unit/test_config_oss.py
index 077c84178..dffdb676d 100644
--- a/tests/unit/test_config_oss.py
+++ b/tests/unit/test_config_oss.py
@@ -40,7 +40,7 @@ def _fresh_settings(**env_overrides: dict[str, str]):
         "JWT_SECRET_KEY": "unit-test-secret-key-12345",
         **env_overrides,
     }
-    with patch.dict(os.environ, env, clear=False):
+    with patch.dict(os.environ, env, clear=True):
         Settings = _load_settings_class()
         return Settings()
 
@@ -192,7 +192,7 @@ class TestOSSConfigAliases:
             "JWT_SECRET_KEY": "unit-test-secret-key-12345",
             "MAX_UPLOAD_SIZE_MB": "3000",
         }
-        with patch.dict(os.environ, env, clear=False):
+        with patch.dict(os.environ, env, clear=True):
             os.environ.pop("OSS_DIRECT_UPLOAD_MAX_MB", None)
             Settings = _load_settings_class()
             settings = Settings()