diff --git a/tests/unit/test_option.py b/tests/unit/test_option.py
index 1cb9dae..eb4f95d 100644
--- a/tests/unit/test_option.py
+++ b/tests/unit/test_option.py
@@ -25,7 +25,7 @@ def test_to_optparse():
 
 @pytest.mark.parametrize('opttype,str_val,expected', [
     ('float', '2', 2.0),
-    ('complex', '2', (2+0j)),
+    ('complex', '2', (2 + 0j)),
 ])
 def test_to_support_optparses_standard_types(opttype, str_val, expected):
     """Show that optparse converts float and complex types correctly."""