diff --git a/tests/test_callbacks.py b/tests/test_callbacks.py
index bb818c52d7..d2afbc2ca3 100644
--- a/tests/test_callbacks.py
+++ b/tests/test_callbacks.py
@@ -115,7 +115,6 @@ def __call__(self, a):
     assert m.dummy_function_overloaded_std_func_arg(A()) == 9
     assert m.dummy_function_overloaded_std_func_arg(lambda i: i) == 9
 
-
     def f2(a, b):
         return a + b