diff --git a/openbsc/tests/db/db_test.c b/openbsc/tests/db/db_test.c
index 62fbb73..a02d1f8 100644
--- a/openbsc/tests/db/db_test.c
+++ b/openbsc/tests/db/db_test.c
@@ -116,6 +116,13 @@
 	OSMO_ASSERT(sms->user_data_len == strlen("UserData123"));
 	OSMO_ASSERT(strcmp((char *) sms->user_data, "UserData123") == 0);
 
+	/* Mark the SMS as delivered */
+	db_sms_mark_delivered(sms);
+	sms_free(sms);
+
+	sms = db_sms_get_unsent_for_subscr(subscr);
+	OSMO_ASSERT(!sms);
+
 	subscr_put(subscr);
 }