diff --git a/contrib/test_decoding/expected/stream.out b/contrib/test_decoding/expected/stream.out
index 6a8a00a65b..a76f77601e 100644
--- a/contrib/test_decoding/expected/stream.out
+++ b/contrib/test_decoding/expected/stream.out
@@ -128,28 +128,6 @@ SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL,
      5
 (1 row)
 
--- Test that accessing a TOAST table in streaming mode is allowed.
--- Create a table with a column that uses a TOASTed default value.
--- (temporarily hide query, to avoid the long CREATE TABLE stmt)
-\set ECHO none
-SET debug_logical_replication_streaming = immediate;
-BEGIN;
-INSERT INTO test_tab VALUES(1);
--- Force WAL flush, so that the above changes will be streamed.
-SELECT 'force flush' FROM pg_switch_wal();
-  ?column?   
--------------
- force flush
-(1 row)
-
-SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
- count 
--------
-     3
-(1 row)
-
-COMMIT;
-RESET debug_logical_replication_streaming;
 DROP TABLE stream_test;
 SELECT pg_drop_replication_slot('regression_slot');
  pg_drop_replication_slot 
diff --git a/contrib/test_decoding/expected/twophase.out b/contrib/test_decoding/expected/twophase.out
index 517f20bc37..08a7c56b5d 100644
--- a/contrib/test_decoding/expected/twophase.out
+++ b/contrib/test_decoding/expected/twophase.out
@@ -205,11 +205,34 @@ SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'inc
  COMMIT
 (3 rows)
 
+-- Test that accessing a TOAST table is permitted during the decoding of a
+-- prepared transaction.
+-- Create a table with a column that uses a TOASTed default value.
+-- (temporarily hide query, to avoid the long CREATE TABLE stmt)
+\set ECHO none
+BEGIN;
+INSERT INTO test_tab VALUES('test');
+PREPARE TRANSACTION 'test_toast_table_access';
+SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
+ count 
+-------
+     3
+(1 row)
+
+COMMIT PREPARED 'test_toast_table_access';
+-- consume commit prepared
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
+                   data                    
+-------------------------------------------
+ COMMIT PREPARED 'test_toast_table_access'
+(1 row)
+
 -- Test 8:
 -- cleanup and make sure results are also empty
 DROP TABLE test_prepared1;
 DROP TABLE test_prepared2;
 DROP TABLE test_prepared_savepoint;
+DROP TABLE test_tab;
 -- show results. There should be nothing to show
 SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
  data 
diff --git a/contrib/test_decoding/sql/stream.sql b/contrib/test_decoding/sql/stream.sql
index d7a696586e..7f43f0c2ab 100644
--- a/contrib/test_decoding/sql/stream.sql
+++ b/contrib/test_decoding/sql/stream.sql
@@ -59,27 +59,5 @@ ROLLBACK TO s1;
 COMMIT;
 SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
 
--- Test that accessing a TOAST table in streaming mode is allowed.
-
--- Create a table with a column that uses a TOASTed default value.
--- (temporarily hide query, to avoid the long CREATE TABLE stmt)
-\set ECHO none
-SELECT 'CREATE TABLE test_tab (a text DEFAULT ''' || string_agg('toast value', '') || ''');' FROM generate_series(1, 4000)
-\gexec
-\set ECHO all
-
-SET debug_logical_replication_streaming = immediate;
-
-BEGIN;
-INSERT INTO test_tab VALUES(1);
-
--- Force WAL flush, so that the above changes will be streamed.
-SELECT 'force flush' FROM pg_switch_wal();
-
-SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
-COMMIT;
-
-RESET debug_logical_replication_streaming;
-
 DROP TABLE stream_test;
 SELECT pg_drop_replication_slot('regression_slot');
diff --git a/contrib/test_decoding/sql/twophase.sql b/contrib/test_decoding/sql/twophase.sql
index 0244795f3d..4b9ef0c0c4 100644
--- a/contrib/test_decoding/sql/twophase.sql
+++ b/contrib/test_decoding/sql/twophase.sql
@@ -104,11 +104,33 @@ COMMIT PREPARED 'test_prepared_nodecode';
 -- should be decoded now
 SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
 
+-- Test that accessing a TOAST table is permitted during the decoding of a
+-- prepared transaction.
+
+-- Create a table with a column that uses a TOASTed default value.
+-- (temporarily hide query, to avoid the long CREATE TABLE stmt)
+\set ECHO none
+SELECT 'CREATE TABLE test_tab (a text DEFAULT ''' || string_agg('toast value', '') || ''');' FROM generate_series(1, 4000)
+\gexec
+\set ECHO all
+
+BEGIN;
+INSERT INTO test_tab VALUES('test');
+PREPARE TRANSACTION 'test_toast_table_access';
+
+SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
+
+COMMIT PREPARED 'test_toast_table_access';
+
+-- consume commit prepared
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
+
 -- Test 8:
 -- cleanup and make sure results are also empty
 DROP TABLE test_prepared1;
 DROP TABLE test_prepared2;
 DROP TABLE test_prepared_savepoint;
+DROP TABLE test_tab;
 -- show results. There should be nothing to show
 SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');