diff --git a/test/unit/persist_read_stubs.c b/test/unit/persist_read_stubs.c
index 568016ec..0c77c1d8 100644
--- a/test/unit/persist_read_stubs.c
+++ b/test/unit/persist_read_stubs.c
@@ -148,3 +148,11 @@ void db__msg_store_ref_inc(struct mosquitto_msg_store *store)
 	store->ref_count++;
 }
 
+int session_expiry__add_from_persistence(struct mosquitto_db *db, struct mosquitto *context, time_t expiry_time)
+{
+	UNUSED(db);
+	UNUSED(context);
+	UNUSED(expiry_time);
+
+	return 0;
+}
diff --git a/test/unit/persist_write_stubs.c b/test/unit/persist_write_stubs.c
index 97bb8e05..76cc7a8c 100644
--- a/test/unit/persist_write_stubs.c
+++ b/test/unit/persist_write_stubs.c
@@ -69,3 +69,12 @@ int send__pubrel(struct mosquitto *mosq, uint16_t mid)
 	return MOSQ_ERR_SUCCESS;
 }
 
+int session_expiry__add_from_persistence(struct mosquitto_db *db, struct mosquitto *context, time_t expiry_time)
+{
+	UNUSED(db);
+	UNUSED(context);
+	UNUSED(expiry_time);
+
+	return 0;
+}
+