1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/string.py b/Lib/string.py
index e10087e..7c0e001 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -199,7 +199,7 @@ class Template:
             if mo.group('escaped') is not None:
                 return self.delimiter
             if mo.group('invalid') is not None:
-                self._invalid(mo)
+                return self.delimiter
             raise ValueError('Unrecognized named group in pattern',
                              self.pattern)
         return self.pattern.sub(convert, self.template)