diff --git a/test/test_inference/test_signature.py b/test/test_inference/test_signature.py
index f3087783..4ade46e4 100644
--- a/test/test_inference/test_signature.py
+++ b/test/test_inference/test_signature.py
@@ -355,6 +355,7 @@ def test_dataclass_signature(Script, skip_pre_python37, start, start_params):
     price, = sig.params[-2].infer()
     assert price.name == 'float'
 
+
 @pytest.mark.parametrize(
     'start, start_params', [
         ['@define\nclass X:', []],