diff --git a/expect/disable_dyn_auth.inc b/expect/disable_dyn_auth.inc
new file mode 100644
index 0000000..73e7497
--- /dev/null
+++ b/expect/disable_dyn_auth.inc
@@ -0,0 +1,35 @@
+#
+# Copyright (c) 2020, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# Script to interact with an TF-A built with Trusted Board Boot
+#
+source [file join [file dirname [info script]] handle-arguments.inc]
+
+# 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" "BL2 booting"
+expect_string "Disabling authentication of images dynamically" "Authentication disabled dynamically"
+expect {
+	# 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)
+
+	-re "Loading image id=(6|7|8|9|10|11|12|13|14|15) at address " {
+		puts "<<Dynamic Authentication not disabled>>"
+		exit_uart -1
+	}
+	"BL1: Booting BL31" {
+		puts "BL31 Booting"
+	}
+    }