diff --git a/tftf/tests/runtime_services/host_realm_managment/host_realm_rmi.c b/tftf/tests/runtime_services/host_realm_managment/host_realm_rmi.c
index e6b6ad4..ebf4580 100644
--- a/tftf/tests/runtime_services/host_realm_managment/host_realm_rmi.c
+++ b/tftf/tests/runtime_services/host_realm_managment/host_realm_rmi.c
@@ -772,6 +772,8 @@
 		goto err_undelegate_rtt;
 	}
 
+	memset((char *)params, 0U, PAGE_SIZE);
+
 	/* Populate params */
 	params->s2sz = EXTRACT(RMI_FEATURE_REGISTER_0_S2SZ,
 				realm->rmm_feat_reg0);