diff --git a/sources/test_calc.py b/sources/test_calc.py
index 130f9f7..2f8d011 100644
--- a/sources/test_calc.py
+++ b/sources/test_calc.py
@@ -46,3 +46,4 @@ class TestCalc(unittest.TestCase):
 
 if __name__ == '__main__':
     unittest.main()
+