diff --git a/nomenclature/codelist.py b/nomenclature/codelist.py
index 7f1eee02..373f7068 100644
--- a/nomenclature/codelist.py
+++ b/nomenclature/codelist.py
@@ -346,7 +346,6 @@ def _check_string(attr, value):
                     errors.append(
                         ValueError(
                             f"Illegal character(s) '{found}' in {attr} of {self.name} '{code.name}'."
-                            " Check for illegal characters and/or if tags were spelled correctly."
                         )
                     )
             elif isinstance(value, dict):