--- a/src/bin/pg_upgrade/t/002_pg_upgrade.pl
+++ b/src/bin/pg_upgrade/t/002_pg_upgrade.pl
@@ -208,6 +208,8 @@ if (defined($ENV{oldinstall}))
    }
 }

+$oldnode->safe_psql("regression", "VACUUM FULL pg_largeobject;");
+