diff -U3 /tmp/cirrus-ci-build/src/test/regress/expected/subscription.out /tmp/cirrus-ci-build/build/testrun/pg_upgrade/002_pg_upgrade/data/results/subscription.out
--- /tmp/cirrus-ci-build/src/test/regress/expected/subscription.out	2024-04-11 06:18:27.782614343 +0000
+++ /tmp/cirrus-ci-build/build/testrun/pg_upgrade/002_pg_upgrade/data/results/subscription.out	2024-04-11 06:20:39.126574286 +0000
@@ -381,7 +381,7 @@
 
 --fail - alter of two_phase option not supported.
 ALTER SUBSCRIPTION regress_testsub SET (two_phase = false);
-ERROR:  unrecognized subscription parameter: "two_phase"
+ERROR:  could not connect to the publisher: connection to server on socket "/tmp/9CptDgGFvK/.s.PGSQL.57173" failed: FATAL:  number of requested standby connections exceeds max_wal_senders (currently 0)
 -- but can alter streaming when two_phase enabled
 ALTER SUBSCRIPTION regress_testsub SET (streaming = true);
 \dRs+