diff --git a/tests/scripts/generate_tls13_compat_tests.py b/tests/scripts/generate_tls13_compat_tests.py
index dde37b7..92ca5d6 100755
--- a/tests/scripts/generate_tls13_compat_tests.py
+++ b/tests/scripts/generate_tls13_compat_tests.py
@@ -533,21 +533,16 @@
                      client_object.pre_checks() +
                      [cmd])
 
-SSL_OUTPUT_HEADER = '''#!/bin/sh
-
-# {filename}
-#
-# Copyright The Mbed TLS Contributors
-# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
-#
-# Purpose
-#
-# List TLS1.3 compat test cases. They are generated by
+SSL_OUTPUT_HEADER = '''\
+# TLS 1.3 interoperability test cases (equivalent of compat.sh for TLS 1.3).
+# They are generated by
 # `{cmd}`.
 #
 # PLEASE DO NOT EDIT THIS FILE. IF NEEDED, PLEASE MODIFY `generate_tls13_compat_tests.py`
 # AND REGENERATE THIS FILE.
-#
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 '''
 DATA_FILES_PATH_VAR = '''
 DATA_FILES_PATH=../framework/data_files