diff --git a/lava-expect/disable_dyn_auth.inc b/lava-expect/disable_dyn_auth.inc
new file mode 100644
index 0000000..a50a31a
--- /dev/null
+++ b/lava-expect/disable_dyn_auth.inc
@@ -0,0 +1,27 @@
+#
+# Copyright (c) 2021, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# Script to interact with an TF-A built with Trusted Board Boot
+#
+# This script tries to catch if dynamic authentication of images is enabled
+# during trusted board boot(BL2). The authentication is done using certificates.
+
+expect_string+=('BL1: Booting BL2')
+
+prompt='Disabling authentication of images dynamically'
+# Catch all loading of authentication certificates i.e.,
+# TRUSTED_BOOT_FW_CERT_ID         U(6)
+# TRUSTED_KEY_CERT_ID             U(7)
+# SCP_FW_KEY_CERT_ID              U(8)
+# SOC_FW_KEY_CERT_ID              U(9)
+# TRUSTED_OS_FW_KEY_CERT_ID       U(10)
+# NON_TRUSTED_FW_KEY_CERT_ID      U(11)
+# SCP_FW_CONTENT_CERT_ID          U(12)
+# SOC_FW_CONTENT_CERT_ID          U(13)
+# TRUSTED_OS_FW_CONTENT_CERT_ID   U(14)
+# NON_TRUSTED_FW_CONTENT_CERT_ID  U(15)
+expect_string+=("${prompt};;Loading image id=(6|7|8|9|10|11|12|13|14|15) at address ")
+
+expect_string+=('BL1: Booting BL31')