diff --git a/test/lisp/eshell/em-hist-tests.el b/test/lisp/eshell/em-hist-tests.el
index a08a7a2afcb..5bb16f64a46 100644
--- a/test/lisp/eshell/em-hist-tests.el
+++ b/test/lisp/eshell/em-hist-tests.el
@@ -1,4 +1,4 @@
-;;; tests/em-hist-tests.el --- em-hist test suite
+;;; tests/em-hist-tests.el --- em-hist test suite  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 2017-2020 Free Software Foundation, Inc.
 
diff --git a/test/lisp/eshell/em-ls-tests.el b/test/lisp/eshell/em-ls-tests.el
index da3e224a94d..975701e3838 100644
--- a/test/lisp/eshell/em-ls-tests.el
+++ b/test/lisp/eshell/em-ls-tests.el
@@ -1,4 +1,4 @@
-;;; tests/em-ls-tests.el --- em-ls test suite
+;;; tests/em-ls-tests.el --- em-ls test suite  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 2017-2020 Free Software Foundation, Inc.
 
diff --git a/test/lisp/eshell/esh-opt-tests.el b/test/lisp/eshell/esh-opt-tests.el
index af6c089c16b..caba153cf73 100644
--- a/test/lisp/eshell/esh-opt-tests.el
+++ b/test/lisp/eshell/esh-opt-tests.el
@@ -1,4 +1,4 @@
-;;; tests/esh-opt-tests.el --- esh-opt test suite
+;;; tests/esh-opt-tests.el --- esh-opt test suite  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 2018-2020 Free Software Foundation, Inc.