diff --git a/src/test/modules/xid_wraparound/xid_wraparound--1.0.sql b/src/test/modules/xid_wraparound/xid_wraparound--1.0.sql
index 51d25fc4c63..96356b4b974 100644
--- a/src/test/modules/xid_wraparound/xid_wraparound--1.0.sql
+++ b/src/test/modules/xid_wraparound/xid_wraparound--1.0.sql
@@ -4,9 +4,9 @@
 \echo Use "CREATE EXTENSION xid_wraparound" to load this file. \quit
 
 CREATE FUNCTION consume_xids(nxids bigint)
-RETURNS xid8 IMMUTABLE PARALLEL SAFE STRICT
+RETURNS xid8 VOLATILE PARALLEL UNSAFE STRICT
 AS 'MODULE_PATHNAME' LANGUAGE C;
 
 CREATE FUNCTION consume_xids_until(targetxid xid8)
-RETURNS xid8 IMMUTABLE PARALLEL SAFE STRICT
+RETURNS xid8 VOLATILE PARALLEL UNSAFE STRICT
 AS 'MODULE_PATHNAME' LANGUAGE C;