diff --git a/src/test/regress/expected/explain.out b/src/test/regress/expected/explain.out
index 340747a8f75a..c53bf9c8aa3c 100644
--- a/src/test/regress/expected/explain.out
+++ b/src/test/regress/expected/explain.out
@@ -787,7 +787,7 @@ select explain_filter('explain (analyze,buffers off,costs off) select sum(n) ove
 
 -- Test tuplestore storage usage in Window aggregate (disk case)
 set work_mem to 64;
-select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over() from generate_series(1,2000) a(n)');
+select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over() from generate_series(1,2500) a(n)');
                                   explain_filter                                  
 ----------------------------------------------------------------------------------
  WindowAgg (actual time=N.N..N.N rows=N.N loops=N)
@@ -799,7 +799,7 @@ select explain_filter('explain (analyze,buffers off,costs off) select sum(n) ove
 (6 rows)
 
 -- Test tuplestore storage usage in Window aggregate (memory and disk case, final result is disk)
-select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over(partition by m) from (SELECT n < 3 as m, n from generate_series(1,2000) a(n))');
+select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over(partition by m) from (SELECT n < 3 as m, n from generate_series(1,2500) a(n))');
                                      explain_filter                                     
 ----------------------------------------------------------------------------------------
  WindowAgg (actual time=N.N..N.N rows=N.N loops=N)
diff --git a/src/test/regress/sql/explain.sql b/src/test/regress/sql/explain.sql
index b266764089f8..7842d25ded3f 100644
--- a/src/test/regress/sql/explain.sql
+++ b/src/test/regress/sql/explain.sql
@@ -183,7 +183,7 @@ select explain_filter('explain (analyze,buffers off,serialize) create temp table
 select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over() from generate_series(1,10) a(n)');
 -- Test tuplestore storage usage in Window aggregate (disk case)
 set work_mem to 64;
-select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over() from generate_series(1,2000) a(n)');
+select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over() from generate_series(1,2500) a(n)');
 -- Test tuplestore storage usage in Window aggregate (memory and disk case, final result is disk)
-select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over(partition by m) from (SELECT n < 3 as m, n from generate_series(1,2000) a(n))');
+select explain_filter('explain (analyze,buffers off,costs off) select sum(n) over(partition by m) from (SELECT n < 3 as m, n from generate_series(1,2500) a(n))');
 reset work_mem;