diff --git a/test/lisp/international/ccl-tests.el b/test/lisp/international/ccl-tests.el
index 3581cd784f0..283b2e1b32b 100644
--- a/test/lisp/international/ccl-tests.el
+++ b/test/lisp/international/ccl-tests.el
@@ -1,3 +1,5 @@
+;;; ccl-tests.el --- unit tests for ccl.el  -*- lexical-binding:t -*-
+
 ;; Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
 ;; This file is part of GNU Emacs.
diff --git a/test/lisp/international/mule-util-tests.el b/test/lisp/international/mule-util-tests.el
index c571782d635..18e63a80775 100644
--- a/test/lisp/international/mule-util-tests.el
+++ b/test/lisp/international/mule-util-tests.el
@@ -1,4 +1,4 @@
-;;; mule-util --- tests for international/mule-util.el
+;;; mule-util --- tests for international/mule-util.el  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 2002-2020 Free Software Foundation, Inc.