diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index 48d3e14d4100ee..7bb1ab38aa4fdf 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -464,7 +464,7 @@ def test_fromhex(self):
             with self.assertRaises(ValueError) as cm:
                 self.type2test.fromhex(value)
             self.assertIn("fromhex() arg must contain an even number of hexadecimal digits", str(cm.exception))
-        for value, position in (("a ", 1), (" aa a ", 5),(" aa a a ", 5)):
+        for value, position in (("a ", 1), (" aa a ", 5), (" aa a a ", 5)):
             with self.assertRaises(ValueError) as cm:
                 self.type2test.fromhex(value)
             self.assertIn(f"non-hexadecimal number found in fromhex() arg at position {position}", str(cm.exception))