diff --git a/src/test/regress/expected/generated_virtual.out b/src/test/regress/expected/generated_virtual.out
index 24fa3ca8cc7..a04e27230c3 100644
--- a/src/test/regress/expected/generated_virtual.out
+++ b/src/test/regress/expected/generated_virtual.out
@@ -643,17 +643,13 @@ ALTER TABLE gtest20 ALTER COLUMN b SET EXPRESSION AS (a * 100);  -- violates con
 ERROR:  check constraint "gtest20_b_check" of relation "gtest20" is violated by some row
 ALTER TABLE gtest20 ALTER COLUMN b SET EXPRESSION AS (a * 3);  -- ok
 --test no table rewrite happen
+SELECT pg_relation_filenode('gtest20') AS gtest20_filenode \gset
 ALTER TABLE gtest20 ALTER COLUMN b SET EXPRESSION AS (a * 4), ADD COLUMN C int default 11;
-SELECT  pa.attnum,pa.attname,attmissingval
-FROM    pg_attribute pa
-JOIN    pg_attrdef patt ON pa.attrelid = patt.adrelid AND pa.attnum = patt.adnum
-WHERE   pa.attrelid = 'gtest20'::regclass
-ORDER BY pa.attnum;
- attnum | attname | attmissingval 
---------+---------+---------------
-      2 | b       | 
-      3 | c       | {11}
-(2 rows)
+SELECT pg_relation_filenode('gtest20') = :gtest20_filenode AS is_same_file;
+ is_same_file 
+--------------
+ t
+(1 row)
 
 CREATE TABLE gtest20a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) VIRTUAL);
 INSERT INTO gtest20a (a) VALUES (10);
diff --git a/src/test/regress/sql/generated_virtual.sql b/src/test/regress/sql/generated_virtual.sql
index 10e0e65c590..765006af23c 100644
--- a/src/test/regress/sql/generated_virtual.sql
+++ b/src/test/regress/sql/generated_virtual.sql
@@ -320,12 +320,9 @@ INSERT INTO gtest20 (a) VALUES (30);  -- violates constraint
 ALTER TABLE gtest20 ALTER COLUMN b SET EXPRESSION AS (a * 100);  -- violates constraint
 ALTER TABLE gtest20 ALTER COLUMN b SET EXPRESSION AS (a * 3);  -- ok
 --test no table rewrite happen
+SELECT pg_relation_filenode('gtest20') AS gtest20_filenode \gset
 ALTER TABLE gtest20 ALTER COLUMN b SET EXPRESSION AS (a * 4), ADD COLUMN C int default 11;
-SELECT  pa.attnum,pa.attname,attmissingval
-FROM    pg_attribute pa
-JOIN    pg_attrdef patt ON pa.attrelid = patt.adrelid AND pa.attnum = patt.adnum
-WHERE   pa.attrelid = 'gtest20'::regclass
-ORDER BY pa.attnum;
+SELECT pg_relation_filenode('gtest20') = :gtest20_filenode AS is_same_file;
 
 CREATE TABLE gtest20a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) VIRTUAL);
 INSERT INTO gtest20a (a) VALUES (10);