diff -U3 /tmp/cirrus-ci-build/src/test/regress/expected/btree_index.out /tmp/cirrus-ci-build/src/bin/pg_upgrade/tmp_check/results/btree_index.out
--- /tmp/cirrus-ci-build/src/test/regress/expected/btree_index.out	2024-09-06 13:46:22.385200027 +0000
+++ /tmp/cirrus-ci-build/src/bin/pg_upgrade/tmp_check/results/btree_index.out	2024-09-06 13:50:26.152109835 +0000
@@ -166,11 +166,10 @@
 (3 rows)
 
 select hundred, twenty from tenk1 where hundred < 48 order by hundred desc limit 1;
- hundred | twenty 
----------+--------
-      47 |      7
-(1 row)
-
+ERROR:  deadlock detected
+DETAIL:  Process 31963 waits for AccessShareLock on relation 24363 of database 16387; blocked by process 31945.
+Process 31945 waits for AccessExclusiveLock on relation 16421 of database 16387; blocked by process 31963.
+HINT:  See server log for query details.
 -- This variant of the query need only return a single tuple located to the immediate
 -- right of the '(48, -inf)' high key.  It also only needs to scan one single
 -- leaf page (the right sibling of the page scanned by the last test case):