diff --git a/scripts/mbedtls_dev/generate_server9_bad_saltlen.py b/scripts/mbedtls_dev/generate_server9_bad_saltlen.py
index 813e6dc0f..36682152a 100755
--- a/scripts/mbedtls_dev/generate_server9_bad_saltlen.py
+++ b/scripts/mbedtls_dev/generate_server9_bad_saltlen.py
@@ -1,8 +1,7 @@
 #!/usr/bin/env python3
 """Generate server9-bad-saltlen.crt
 
-`server9-bad-saltlen.crt (announcing saltlen = 0xDE, signed with another len)`. It can not generate
-with normal command. This script is to generate the file.
+Generate a certificate signed with RSA-PSS, with an incorrect salt length.
 """
 
 # Copyright The Mbed TLS Contributors