diff --git a/src/test/regress/expected/oid8.out b/src/test/regress/expected/oid8.out
index 3689d21e7c5..2e114f1ce70 100644
--- a/src/test/regress/expected/oid8.out
+++ b/src/test/regress/expected/oid8.out
@@ -344,22 +344,22 @@ SELECT DISTINCT (i || '000000000000' || j)::oid8 f
 (100 rows)
 
 -- 3-way compare for btrees
-SELECT btoid8cmp(1::oid8, 2::oid8);
- btoid8cmp 
+SELECT btoid8cmp(1::oid8, 2::oid8) < 0 AS val_lower;
+ val_lower 
 -----------
-        -1
+ t
 (1 row)
 
-SELECT btoid8cmp(2::oid8, 2::oid8);
- btoid8cmp 
+SELECT btoid8cmp(2::oid8, 2::oid8) = 0 AS val_equal;
+ val_equal 
 -----------
-         0
+ t
 (1 row)
 
-SELECT btoid8cmp(2::oid8, 1::oid8);
- btoid8cmp 
------------
-         1
+SELECT btoid8cmp(2::oid8, 1::oid8) > 0 AS val_higher;
+ val_higher 
+------------
+ t
 (1 row)
 
 -- oid8 has btree and hash opclasses
diff --git a/src/test/regress/sql/oid8.sql b/src/test/regress/sql/oid8.sql
index 8bfaff01f12..44cb79dd552 100644
--- a/src/test/regress/sql/oid8.sql
+++ b/src/test/regress/sql/oid8.sql
@@ -76,9 +76,9 @@ SELECT DISTINCT (i || '000000000000' || j)::oid8 f
   ORDER BY f;
 
 -- 3-way compare for btrees
-SELECT btoid8cmp(1::oid8, 2::oid8);
-SELECT btoid8cmp(2::oid8, 2::oid8);
-SELECT btoid8cmp(2::oid8, 1::oid8);
+SELECT btoid8cmp(1::oid8, 2::oid8) < 0 AS val_lower;
+SELECT btoid8cmp(2::oid8, 2::oid8) = 0 AS val_equal;
+SELECT btoid8cmp(2::oid8, 1::oid8) > 0 AS val_higher;
 
 -- oid8 has btree and hash opclasses
 CREATE INDEX on OID8_TBL USING btree(f1);