Update checkpattern.py

Author: hyperkai

mypy/checkpattern.py

@@ -546,7 +546,7 @@ def visit_class_pattern(self, o: ClassPattern) -> PatternType:
         typ = self.chk.expr_checker.accept(o.class_ref)
         p_typ = get_proper_type(typ)
         if isinstance(type_info, TypeAlias) and not type_info.no_args:
-            self.msg.fail(message_registry.CLASS_PATTERN_GENERIC_TYPE_ALIAS, o)
+            self.msg.fail(message_registry.NOT_CALLABLE.format('"TypeAliasType"'), o)
             return self.early_non_match()
         elif isinstance(p_typ, FunctionLike) and p_typ.is_type_obj():
             typ = fill_typevars_with_any(p_typ.type_object())