diff --git a/Lib/test/test_format.py b/Lib/test/test_format.py
index dff8c690321..d2744cdfdca 100644
--- a/Lib/test/test_format.py
+++ b/Lib/test/test_format.py
@@ -514,7 +514,7 @@ class FormatTest(unittest.TestCase):
     def test_with_an_underscore_and_a_comma_in_format_specifier(self):
         error_msg = re.escape("Cannot specify both ',' and '_'.")
         with self.assertRaisesRegex(ValueError, error_msg):
-            '{:,_}'.format(1)
+            '{:_,}'.format(1)
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/Lib/test/test_fstring.py b/Lib/test/test_fstring.py
index 7432ae96c82..2ae815aab18 100644
--- a/Lib/test/test_fstring.py
+++ b/Lib/test/test_fstring.py
@@ -1227,7 +1227,7 @@ non-important content
     def test_with_an_underscore_and_a_comma_in_format_specifier(self):
         error_msg = re.escape("Cannot specify both ',' and '_'.")
         with self.assertRaisesRegex(ValueError, error_msg):
-            f'{1:,_}'
+            f'{1:_,}'
 
 if __name__ == '__main__':
     unittest.main()