diff --git a/tests/models/auto/test_modeling_auto.py b/tests/models/auto/test_modeling_auto.py
index 95d716898..5766b4ada 100644
--- a/tests/models/auto/test_modeling_auto.py
+++ b/tests/models/auto/test_modeling_auto.py
@@ -239,7 +239,7 @@ class AutoModelTest(unittest.TestCase):
 
         # Check kwargs are correctly passed to the backbone
         model = AutoBackbone.from_pretrained("resnet18", use_timm_backbone=True, out_indices=(-2, -1))
-        self.assertEqual(model.out_indices, (-2, -1))
+        self.assertEqual(model.out_indices, [-2, -1])
 
         # Check out_features cannot be passed to Timm backbones
         with self.assertRaises(ValueError):