diff --git a/tests/basic/test_models.py b/tests/basic/test_models.py
index 66bcf3095..ce560a30c 100644
--- a/tests/basic/test_models.py
+++ b/tests/basic/test_models.py
@@ -12,6 +12,17 @@ from aider.models import (
 
 
 class TestModels(unittest.TestCase):
+    def setUp(self):
+        """Reset MODEL_SETTINGS before each test"""
+        from aider.models import MODEL_SETTINGS
+        self._original_settings = MODEL_SETTINGS.copy()
+
+    def tearDown(self):
+        """Restore original MODEL_SETTINGS after each test"""
+        from aider.models import MODEL_SETTINGS
+        MODEL_SETTINGS.clear()
+        MODEL_SETTINGS.extend(self._original_settings)
+
     def test_get_model_info_nonexistent(self):
         manager = ModelInfoManager()
         info = manager.get_model_info("non-existent-model")