diff --git a/contrib/test_decoding/expected/oldest_xmin.out b/contrib/test_decoding/expected/oldest_xmin.out
index d09342c4be..a5d7d3c2ca 100644
--- a/contrib/test_decoding/expected/oldest_xmin.out
+++ b/contrib/test_decoding/expected/oldest_xmin.out
@@ -15,7 +15,7 @@ step s0_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slo
 data           
 
 step s1_commit: COMMIT;
-step s0_vacuum: VACUUM FULL;
+step s0_vacuum: VACUUM pg_attribute;
 step s0_get_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
 data           
 
diff --git a/contrib/test_decoding/specs/oldest_xmin.spec b/contrib/test_decoding/specs/oldest_xmin.spec
index 4f8af70aa2..cd2b69cae2 100644
--- a/contrib/test_decoding/specs/oldest_xmin.spec
+++ b/contrib/test_decoding/specs/oldest_xmin.spec
@@ -22,7 +22,7 @@ step "s0_getxid" { SELECT txid_current() IS NULL; }
 step "s0_alter" { ALTER TYPE basket DROP ATTRIBUTE mangos; }
 step "s0_commit" { COMMIT; }
 step "s0_checkpoint" { CHECKPOINT; }
-step "s0_vacuum" { VACUUM FULL; }
+step "s0_vacuum" { VACUUM pg_attribute; }
 step "s0_get_changes" { SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); }
 
 session "s1"