diff --git a/tests/test_explainability/test_shap_tree_explainer.py b/tests/test_explainability/test_shap_tree_explainer.py
index 9d739f56..52edb505 100644
--- a/tests/test_explainability/test_shap_tree_explainer.py
+++ b/tests/test_explainability/test_shap_tree_explainer.py
@@ -191,7 +191,7 @@ def test_explanations_pipeline_with_invalid_inputs(self) -> None:
         n_bits = 64
 
         for estimator in estimators:
-            for fill_value in enumerate(fill_values):
+            for fill_value in fill_values:
 
                 # pipeline with ErrorFilter
                 error_filter1 = ErrorFilter()