diff --git a/Lib/string.py b/Lib/string.py
index de364de56b5..a061558d765 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -231,6 +231,7 @@ class Formatter:
                 # format the object and append to the result
                 result.append(self.format_field(obj, format_spec))
 
+        self.check_unused_args(used_args, args, kwargs)
         self.check_unused_args(used_args, args, kwargs)
         return ''.join(result)