diff --git a/src/test/regress/expected/psql.out b/src/test/regress/expected/psql.out
index a7f5700edc..90beedde58 100644
--- a/src/test/regress/expected/psql.out
+++ b/src/test/regress/expected/psql.out
@@ -5402,6 +5402,136 @@ CONTEXT:  PL/pgSQL function warn(text) line 2 at RAISE
 \set SHOW_ALL_RESULTS on
 DROP FUNCTION warn(TEXT);
 --
+-- \g file
+--
+\getenv abs_builddir PG_ABS_BUILDDIR
+\set outfile1 :abs_builddir '/results/psql-output1'
+-- this table is used to load back the output data from files
+CREATE TEMPORARY TABLE reload_output(
+ lineno int not null generated always as identity,
+ line text
+);
+SELECT 1 AS a \g :outfile1
+COPY reload_output(line) FROM :'outfile1';
+SELECT 2 AS b\; SELECT 3 AS c\; SELECT 4 AS d \g :outfile1
+COPY reload_output(line) FROM :'outfile1';
+COPY (select 'foo') to stdout \; COPY (select 'bar') to stdout \g :outfile1
+COPY reload_output(line) FROM :'outfile1';
+SELECT line FROM reload_output ORDER BY lineno;
+  line   
+---------
+  a 
+ ---
+  1
+ (1 row)
+ 
+  b 
+ ---
+  2
+ (1 row)
+ 
+  c 
+ ---
+  3
+ (1 row)
+ 
+  d 
+ ---
+  4
+ (1 row)
+ 
+ foo
+ bar
+(22 rows)
+
+TRUNCATE TABLE reload_output;
+--
+-- \o file
+--
+\set outfile2 :abs_builddir '/results/psql-output2'
+\o :outfile2
+select max(unique1) from onek;
+SELECT 1 AS a\; SELECT 2 AS b\; SELECT 3 AS c;
+-- COPY TO file
+-- the data goes into :outfile1 and the command status into :outfile2
+\set QUIET false
+COPY (select unique1 from onek order by unique1 limit 10) TO :'outfile1';
+-- DML command status
+UPDATE onek SET unique1=unique1 WHERE false;
+\set QUIET true
+\o
+COPY reload_output(line) FROM :'outfile1';
+SELECT line FROM reload_output ORDER BY lineno;
+ line 
+------
+ 0
+ 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+(10 rows)
+
+TRUNCATE TABLE reload_output;
+COPY reload_output(line) FROM :'outfile2';
+SELECT line FROM reload_output ORDER BY lineno;
+   line   
+----------
+  max 
+ -----
+  999
+ (1 row)
+ 
+  a 
+ ---
+  1
+ (1 row)
+ 
+  b 
+ ---
+  2
+ (1 row)
+ 
+  c 
+ ---
+  3
+ (1 row)
+ 
+ COPY 10
+ UPDATE 0
+(22 rows)
+
+TRUNCATE TABLE reload_output;
+\o :outfile2
+-- multiple COPY TO stdout
+-- the data go into :outfile2 and the status is not output
+COPY (select 'foo1') to stdout \; COPY (select 'bar1') to stdout;
+-- combine \o and \g file with multiple COPY queries
+COPY (select 'foo2') to stdout \; COPY (select 'bar2') to stdout \g :outfile1
+\o
+COPY reload_output(line) FROM :'outfile1';
+SELECT line FROM reload_output ORDER BY lineno;
+ line 
+------
+ foo2
+ bar2
+(2 rows)
+
+TRUNCATE TABLE reload_output;
+COPY reload_output(line) FROM :'outfile2';
+SELECT line FROM reload_output ORDER BY lineno;
+ line 
+------
+ foo1
+ bar1
+(2 rows)
+
+TRUNCATE TABLE reload_output;
+--
 -- AUTOCOMMIT and combined queries
 --
 \set AUTOCOMMIT off
diff --git a/src/test/regress/sql/psql.sql b/src/test/regress/sql/psql.sql
index 1149c6a839..c3ae21633d 100644
--- a/src/test/regress/sql/psql.sql
+++ b/src/test/regress/sql/psql.sql
@@ -1365,6 +1365,72 @@ SELECT 1 AS one \; SELECT warn('1.5') \; SELECT 2 AS two ;
 \set SHOW_ALL_RESULTS on
 DROP FUNCTION warn(TEXT);
 
+--
+-- \g file
+--
+\getenv abs_builddir PG_ABS_BUILDDIR
+\set outfile1 :abs_builddir '/results/psql-output1'
+
+-- this table is used to load back the output data from files
+CREATE TEMPORARY TABLE reload_output(
+ lineno int not null generated always as identity,
+ line text
+);
+
+SELECT 1 AS a \g :outfile1
+COPY reload_output(line) FROM :'outfile1';
+
+SELECT 2 AS b\; SELECT 3 AS c\; SELECT 4 AS d \g :outfile1
+COPY reload_output(line) FROM :'outfile1';
+
+COPY (select 'foo') to stdout \; COPY (select 'bar') to stdout \g :outfile1
+COPY reload_output(line) FROM :'outfile1';
+
+SELECT line FROM reload_output ORDER BY lineno;
+TRUNCATE TABLE reload_output;
+
+--
+-- \o file
+--
+\set outfile2 :abs_builddir '/results/psql-output2'
+
+\o :outfile2
+select max(unique1) from onek;
+SELECT 1 AS a\; SELECT 2 AS b\; SELECT 3 AS c;
+
+-- COPY TO file
+-- the data goes into :outfile1 and the command status into :outfile2
+\set QUIET false
+COPY (select unique1 from onek order by unique1 limit 10) TO :'outfile1';
+-- DML command status
+UPDATE onek SET unique1=unique1 WHERE false;
+\set QUIET true
+\o
+
+COPY reload_output(line) FROM :'outfile1';
+SELECT line FROM reload_output ORDER BY lineno;
+TRUNCATE TABLE reload_output;
+
+COPY reload_output(line) FROM :'outfile2';
+SELECT line FROM reload_output ORDER BY lineno;
+TRUNCATE TABLE reload_output;
+
+\o :outfile2
+-- multiple COPY TO stdout
+-- the data go into :outfile2 and the status is not output
+COPY (select 'foo1') to stdout \; COPY (select 'bar1') to stdout;
+-- combine \o and \g file with multiple COPY queries
+COPY (select 'foo2') to stdout \; COPY (select 'bar2') to stdout \g :outfile1
+\o
+
+COPY reload_output(line) FROM :'outfile1';
+SELECT line FROM reload_output ORDER BY lineno;
+TRUNCATE TABLE reload_output;
+
+COPY reload_output(line) FROM :'outfile2';
+SELECT line FROM reload_output ORDER BY lineno;
+TRUNCATE TABLE reload_output;
+
 --
 -- AUTOCOMMIT and combined queries
 --