diff --git a/python/cudf/cudf/tests/test_binops.py b/python/cudf/cudf/tests/test_binops.py
index 0051756d22d..5265278db4c 100644
--- a/python/cudf/cudf/tests/test_binops.py
+++ b/python/cudf/cudf/tests/test_binops.py
@@ -785,7 +785,7 @@ def test_operator_func_series_and_scalar(
     )
     pdf_series_result = getattr(pdf_series, func)(
         np.array(scalar)[()] if use_cudf_scalar else scalar,
-        fill_value=fill_value
+        fill_value=fill_value,
     )
 
     assert_eq(pdf_series_result, gdf_series_result)