diff --git a/src/test/regress/expected/large_object.out b/src/test/regress/expected/large_object.out
deleted file mode 100644
index b00d47cc75e..00000000000
--- a/src/test/regress/expected/large_object.out
+++ /dev/null
@@ -1,15 +0,0 @@
--- This is more-or-less DROP IF EXISTS LARGE OBJECT 3001;
-WITH unlink AS (SELECT lo_unlink(loid) FROM pg_largeobject WHERE loid = 3001) SELECT 1;
- ?column? 
-----------
-        1
-(1 row)
-
--- Test creation of a large object and leave it for testing pg_upgrade
-SELECT lo_create(3001);
- lo_create 
------------
-      3001
-(1 row)
-
-COMMENT ON LARGE OBJECT 3001 IS 'testing comments';
diff --git a/src/test/regress/input/largeobject.source b/src/test/regress/input/largeobject.source
index 5b6f9c0186b..2f1b26caa8a 100644
--- a/src/test/regress/input/largeobject.source
+++ b/src/test/regress/input/largeobject.source
@@ -170,4 +170,11 @@ SELECT pageno, data FROM pg_largeobject WHERE loid = :newloid;
 SELECT lo_unlink(loid) FROM lotest_stash_values;
 \lo_unlink :newloid
 
-TRUNCATE lotest_stash_values;
+-- Create one more object that we leave behind for testing pg_dump/pg_upgrade;
+-- this one intentionally has an OID in the system range
+SELECT lo_create(3001);
+
+COMMENT ON LARGE OBJECT 3001 IS 'testing comments';
+
+-- Clean up
+DROP TABLE lotest_stash_values;
diff --git a/src/test/regress/output/largeobject.source b/src/test/regress/output/largeobject.source
index 3489a9b5780..c8aab777e7e 100644
--- a/src/test/regress/output/largeobject.source
+++ b/src/test/regress/output/largeobject.source
@@ -291,4 +291,14 @@ SELECT lo_unlink(loid) FROM lotest_stash_values;
 (1 row)
 
 \lo_unlink :newloid
-TRUNCATE lotest_stash_values;
+-- Create one more object that we leave behind for testing pg_dump/pg_upgrade;
+-- this one intentionally has an OID in the system range
+SELECT lo_create(3001);
+ lo_create 
+-----------
+      3001
+(1 row)
+
+COMMENT ON LARGE OBJECT 3001 IS 'testing comments';
+-- Clean up
+DROP TABLE lotest_stash_values;
diff --git a/src/test/regress/output/largeobject_1.source b/src/test/regress/output/largeobject_1.source
index d5a6d0b3868..e1893dd10be 100644
--- a/src/test/regress/output/largeobject_1.source
+++ b/src/test/regress/output/largeobject_1.source
@@ -291,4 +291,14 @@ SELECT lo_unlink(loid) FROM lotest_stash_values;
 (1 row)
 
 \lo_unlink :newloid
-TRUNCATE lotest_stash_values;
+-- Create one more object that we leave behind for testing pg_dump/pg_upgrade;
+-- this one intentionally has an OID in the system range
+SELECT lo_create(3001);
+ lo_create 
+-----------
+      3001
+(1 row)
+
+COMMENT ON LARGE OBJECT 3001 IS 'testing comments';
+-- Clean up
+DROP TABLE lotest_stash_values;
diff --git a/src/test/regress/parallel_schedule b/src/test/regress/parallel_schedule
index 2292fd35338..1b5560f9704 100644
--- a/src/test/regress/parallel_schedule
+++ b/src/test/regress/parallel_schedule
@@ -83,7 +83,7 @@ test: select_into select_distinct select_distinct_on select_implicit select_havi
 # ----------
 # Another group of parallel tests
 # ----------
-test: privileges security_label collate large_object
+test: privileges security_label collate
 
 test: misc
 # rules cannot run concurrently with any test that creates a view
diff --git a/src/test/regress/serial_schedule b/src/test/regress/serial_schedule
index da3b46b8f86..355fe74a0bc 100644
--- a/src/test/regress/serial_schedule
+++ b/src/test/regress/serial_schedule
@@ -94,7 +94,6 @@ test: prepared_xacts
 test: privileges
 test: security_label
 test: collate
-test: large_object
 test: misc
 test: rules
 test: select_views
diff --git a/src/test/regress/sql/large_object.sql b/src/test/regress/sql/large_object.sql
deleted file mode 100644
index c06b393dd36..00000000000
--- a/src/test/regress/sql/large_object.sql
+++ /dev/null
@@ -1,7 +0,0 @@
--- This is more-or-less DROP IF EXISTS LARGE OBJECT 3001;
-WITH unlink AS (SELECT lo_unlink(loid) FROM pg_largeobject WHERE loid = 3001) SELECT 1;
-
--- Test creation of a large object and leave it for testing pg_upgrade
-SELECT lo_create(3001);
-
-COMMENT ON LARGE OBJECT 3001 IS 'testing comments';