diff -U3 /tmp/cirrus-ci-build/src/test/regress/expected/session_variables.out /tmp/cirrus-ci-build/src/bin/pg_upgrade/tmp_check/results/session_variables.out
--- /tmp/cirrus-ci-build/src/test/regress/expected/session_variables.out	2024-03-20 08:03:53.982743602 +0000
+++ /tmp/cirrus-ci-build/src/bin/pg_upgrade/tmp_check/results/session_variables.out	2024-03-20 08:10:20.658458423 +0000
@@ -1230,7 +1230,7 @@
 ----------------------------------------------
  SET SESSION VARIABLE
  Result
-   InitPlan 1 (returns $0)
+   InitPlan 1
      ->  Aggregate
            ->  Seq Scan on var_tab_test_table
 (5 rows)
@@ -1247,7 +1247,7 @@
 -----------------------------------------------------------------------
  SET SESSION VARIABLE
  Result (actual rows=1 loops=1)
-   InitPlan 1 (returns $0)
+   InitPlan 1
      ->  Aggregate (actual rows=1 loops=1)
            ->  Seq Scan on var_tab_test_table (actual rows=10 loops=1)
 (5 rows)
@@ -1267,7 +1267,7 @@
 ----------------------------------------------
  SET SESSION VARIABLE
  Result
-   InitPlan 1 (returns $0)
+   InitPlan 1
      ->  Aggregate
            ->  Seq Scan on var_tab_test_table
 (5 rows)
@@ -1284,7 +1284,7 @@
 -----------------------------------------------------------------------
  SET SESSION VARIABLE
  Result (actual rows=1 loops=1)
-   InitPlan 1 (returns $0)
+   InitPlan 1
      ->  Aggregate (actual rows=1 loops=1)
            ->  Seq Scan on var_tab_test_table (actual rows=10 loops=1)
 (5 rows)