diff --git a/src/test/regress/expected/cost_model.out b/src/test/regress/expected/cost_model.out
index 599d4425c..c56ffcd43 100644
--- a/src/test/regress/expected/cost_model.out
+++ b/src/test/regress/expected/cost_model.out
@@ -10,7 +10,7 @@ SET current_schema = cost_model;
 drop table if exists test_bitmap_cost_with_lossy;
 create table test_bitmap_cost_with_lossy(id int,c1 int,pad text);
 create index test_bitmap_cost_with_lossy_idx_c1 on test_bitmap_cost_with_lossy(c1);
-insert into test_bitmap_cost_with_lossy select id,(random()*200)::int,'sssssssssssssssssssssssssssssssssssss' from (select generate_series(1,300000) id) test_bitmap_cost_with_lossy;
+insert into test_bitmap_cost_with_lossy select id,id%250,'sssssssssssssssssssssssssssssssssssss' from (select generate_series(1,300000) id) test_bitmap_cost_with_lossy;
 analyze test_bitmap_cost_with_lossy;
 -- set work_mem to minimum, ensures that lossy pages are generated in execution plans
 set work_mem='64kB';
diff --git a/src/test/regress/sql/cost_model.sql b/src/test/regress/sql/cost_model.sql
index 675113745..13cd6b368 100644
--- a/src/test/regress/sql/cost_model.sql
+++ b/src/test/regress/sql/cost_model.sql
@@ -10,7 +10,7 @@ SET current_schema = cost_model;
 drop table if exists test_bitmap_cost_with_lossy;
 create table test_bitmap_cost_with_lossy(id int,c1 int,pad text);
 create index test_bitmap_cost_with_lossy_idx_c1 on test_bitmap_cost_with_lossy(c1);
-insert into test_bitmap_cost_with_lossy select id,(random()*200)::int,'sssssssssssssssssssssssssssssssssssss' from (select generate_series(1,300000) id) test_bitmap_cost_with_lossy;
+insert into test_bitmap_cost_with_lossy select id,id%250,'sssssssssssssssssssssssssssssssssssss' from (select generate_series(1,300000) id) test_bitmap_cost_with_lossy;
 analyze test_bitmap_cost_with_lossy;
 
 -- set work_mem to minimum, ensures that lossy pages are generated in execution plans