diff -U3 /Users/admin/pgsql/src/test/isolation/expected/timeouts.out /Users/admin/pgsql/build/testrun/isolation/isolation/results/timeouts.out
--- /Users/admin/pgsql/src/test/isolation/expected/timeouts.out	2024-02-22 23:11:45
+++ /Users/admin/pgsql/build/testrun/isolation/isolation/results/timeouts.out	2024-02-22 23:14:24
@@ -112,6 +112,7 @@
 starting permutation: itto s4_begin checker_sleep s4_check
 step itto: SET idle_in_transaction_session_timeout = '10ms'; SET transaction_timeout = '1s';
 step s4_begin: BEGIN ISOLATION LEVEL READ COMMITTED;
+s4: FATAL:  terminating connection due to idle-in-transaction timeout
 step checker_sleep: SELECT pg_sleep(0.1);
 pg_sleep
 --------