diff --git a/tests/test_flop_count.py b/tests/test_flop_count.py
index ad593b9..8ab7eeb 100644
--- a/tests/test_flop_count.py
+++ b/tests/test_flop_count.py
@@ -189,6 +189,7 @@ def test_customized_ops(self) -> None:
         The second case checks when a new handle for a default operation is
         passed. The new handle should overwrite the default handle.
         """
+
         # New handle for a new operation.
         def dummy_sigmoid_flop_jit(
             inputs: typing.List[Any], outputs: typing.List[Any]