diff --git a/tests/opt-testcases/tls13-misc.sh b/tests/opt-testcases/tls13-misc.sh
old mode 100755
new mode 100644
index 9d5870d..6fe2358
--- a/tests/opt-testcases/tls13-misc.sh
+++ b/tests/opt-testcases/tls13-misc.sh
@@ -1,7 +1,5 @@
-#!/bin/sh
+# Miscellaneous tests of TLS 1.3 features.
 
-# tls13-misc.sh
-#
 # Copyright The Mbed TLS Contributors
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 #