diff --git a/src/test/regress/expected/polymorphism.out b/src/test/regress/expected/polymorphism.out
index 1ff40764d9..980e2e861c 100644
--- a/src/test/regress/expected/polymorphism.out
+++ b/src/test/regress/expected/polymorphism.out
@@ -729,24 +729,24 @@ select q2, sql_if(q2 > 0, q2, q2 + 1) from int8_tbl;
 (5 rows)
 
 -- another sort of polymorphic aggregate
-CREATE AGGREGATE array_cat_accum (anyarray)
+CREATE AGGREGATE array_larger_accum (anyarray)
 (
-    sfunc = array_cat,
+    sfunc = array_larger,
     stype = anyarray,
     initcond = '{}'
 );
-SELECT array_cat_accum(i)
+SELECT array_larger_accum(i)
 FROM (VALUES (ARRAY[1,2]), (ARRAY[3,4])) as t(i);
- array_cat_accum 
------------------
- {1,2,3,4}
+ array_larger_accum 
+--------------------
+ {3,4}
 (1 row)
 
-SELECT array_cat_accum(i)
+SELECT array_larger_accum(i)
 FROM (VALUES (ARRAY[row(1,2),row(3,4)]), (ARRAY[row(5,6),row(7,8)])) as t(i);
-          array_cat_accum          
------------------------------------
- {"(1,2)","(3,4)","(5,6)","(7,8)"}
+ array_larger_accum 
+--------------------
+ {"(5,6)","(7,8)"}
 (1 row)
 
 -- another kind of polymorphic aggregate
diff --git a/src/test/regress/sql/polymorphism.sql b/src/test/regress/sql/polymorphism.sql
index e5222f1f81..15b8dfc6ce 100644
--- a/src/test/regress/sql/polymorphism.sql
+++ b/src/test/regress/sql/polymorphism.sql
@@ -498,17 +498,17 @@ select q2, sql_if(q2 > 0, q2, q2 + 1) from int8_tbl;
 
 -- another sort of polymorphic aggregate
 
-CREATE AGGREGATE array_cat_accum (anyarray)
+CREATE AGGREGATE array_larger_accum (anyarray)
 (
-    sfunc = array_cat,
+    sfunc = array_larger,
     stype = anyarray,
     initcond = '{}'
 );
 
-SELECT array_cat_accum(i)
+SELECT array_larger_accum(i)
 FROM (VALUES (ARRAY[1,2]), (ARRAY[3,4])) as t(i);
 
-SELECT array_cat_accum(i)
+SELECT array_larger_accum(i)
 FROM (VALUES (ARRAY[row(1,2),row(3,4)]), (ARRAY[row(5,6),row(7,8)])) as t(i);
 
 -- another kind of polymorphic aggregate