diff --git a/src/test/regress/expected/select_parallel.out b/src/test/regress/expected/select_parallel.out
index db31837edea3a93a49cd95e8a40292b2bc649622..0efb211c970431a52d2ab53db708b6b109028e58 100644
--- a/src/test/regress/expected/select_parallel.out
+++ b/src/test/regress/expected/select_parallel.out
@@ -300,49 +300,6 @@ select count(*) from tenk1 group by twenty;
    500
 (20 rows)
 
---test rescan behavior of gather merge
-set enable_material = false;
-explain (costs off)
-select * from
-  (select string4, count(unique2)
-   from tenk1 group by string4 order by string4) ss
-  right join (values (1),(2),(3)) v(x) on true;
-                        QUERY PLAN                        
-----------------------------------------------------------
- Nested Loop Left Join
-   ->  Values Scan on "*VALUES*"
-   ->  Finalize GroupAggregate
-         Group Key: tenk1.string4
-         ->  Gather Merge
-               Workers Planned: 4
-               ->  Partial GroupAggregate
-                     Group Key: tenk1.string4
-                     ->  Sort
-                           Sort Key: tenk1.string4
-                           ->  Parallel Seq Scan on tenk1
-(11 rows)
-
-select * from
-  (select string4, count(unique2)
-   from tenk1 group by string4 order by string4) ss
-  right join (values (1),(2),(3)) v(x) on true;
- string4 | count | x 
----------+-------+---
- AAAAxx  |  2500 | 1
- HHHHxx  |  2500 | 1
- OOOOxx  |  2500 | 1
- VVVVxx  |  2500 | 1
- AAAAxx  |  2500 | 2
- HHHHxx  |  2500 | 2
- OOOOxx  |  2500 | 2
- VVVVxx  |  2500 | 2
- AAAAxx  |  2500 | 3
- HHHHxx  |  2500 | 3
- OOOOxx  |  2500 | 3
- VVVVxx  |  2500 | 3
-(12 rows)
-
-reset enable_material;
 -- gather merge test with 0 worker
 set max_parallel_workers = 0;
 explain (costs off)
diff --git a/src/test/regress/sql/select_parallel.sql b/src/test/regress/sql/select_parallel.sql
index 33ce61a0260db34cb0e73f154a16a6065ad20ce7..e717f92e530b64affb46983208189a3e30f8188b 100644
--- a/src/test/regress/sql/select_parallel.sql
+++ b/src/test/regress/sql/select_parallel.sql
@@ -118,22 +118,6 @@ explain (costs off)
 
 select count(*) from tenk1 group by twenty;
 
---test rescan behavior of gather merge
-set enable_material = false;
-
-explain (costs off)
-select * from
-  (select string4, count(unique2)
-   from tenk1 group by string4 order by string4) ss
-  right join (values (1),(2),(3)) v(x) on true;
-
-select * from
-  (select string4, count(unique2)
-   from tenk1 group by string4 order by string4) ss
-  right join (values (1),(2),(3)) v(x) on true;
-
-reset enable_material;
-
 -- gather merge test with 0 worker
 set max_parallel_workers = 0;
 explain (costs off)