diff --git a/src/test/modules/commit_ts/t/004_restart.pl b/src/test/modules/commit_ts/t/004_restart.pl
index a0a24971d20..b686925a7e0 100644
--- a/src/test/modules/commit_ts/t/004_restart.pl
+++ b/src/test/modules/commit_ts/t/004_restart.pl
@@ -7,10 +7,7 @@ use Test::More tests => 16;
 
 my $node_master = get_new_node('master');
 $node_master->init(allows_streaming => 1);
-$node_master->append_conf(
-	'postgresql.conf', qq(
-track_commit_timestamp = on
-));
+$node_master->append_conf('postgresql.conf', 'track_commit_timestamp = on');
 $node_master->start;
 
 my ($ret, $stdout, $stderr);
@@ -75,10 +72,7 @@ is($after_restart_ts, $before_restart_ts,
 
 # Now disable commit timestamps
 
-$node_master->append_conf(
-	'postgresql.conf', qq(
-track_commit_timestamp = off
-));
+$node_master->append_conf('postgresql.conf', 'track_commit_timestamp = off');
 
 $node_master->stop('fast');
 $node_master->start;
@@ -110,10 +104,7 @@ like(
 	'expected error from disabled tx when committs disabled');
 
 # Re-enable, restart and ensure we can still get the old timestamps
-$node_master->append_conf(
-	'postgresql.conf', qq(
-track_commit_timestamp = on
-));
+$node_master->append_conf('postgresql.conf', 'track_commit_timestamp = on');
 
 $node_master->stop('fast');
 $node_master->start;
diff --git a/src/test/perl/PostgresNode.pm b/src/test/perl/PostgresNode.pm
index cb84f1f2c6d..6ee412ed1dc 100644
--- a/src/test/perl/PostgresNode.pm
+++ b/src/test/perl/PostgresNode.pm
@@ -455,7 +455,7 @@ A shortcut method to append to files like pg_hba.conf and postgresql.conf.
 Does no validation or sanity checking. Does not reload the configuration
 after writing.
 
-A newline is NOT automatically appended to the string.
+A newline is automatically appended to the string.
 
 =cut
 
@@ -465,7 +465,7 @@ sub append_conf
 
 	my $conffile = $self->data_dir . '/' . $filename;
 
-	TestLib::append_to_file($conffile, $str);
+	TestLib::append_to_file($conffile, $str . "\n");
 }
 
 =pod
diff --git a/src/test/recovery/t/001_stream_rep.pl b/src/test/recovery/t/001_stream_rep.pl
index ccd59433dab..0ebe366a016 100644
--- a/src/test/recovery/t/001_stream_rep.pl
+++ b/src/test/recovery/t/001_stream_rep.pl
@@ -113,16 +113,16 @@ note "switching to physical replication slot";
 # standbys. Since we're going to be testing things that affect the slot state,
 # also increase the standby feedback interval to ensure timely updates.
 my ($slotname_1, $slotname_2) = ('standby_1', 'standby_2');
-$node_master->append_conf('postgresql.conf', "max_replication_slots = 4\n");
+$node_master->append_conf('postgresql.conf', "max_replication_slots = 4");
 $node_master->restart;
 is($node_master->psql('postgres', qq[SELECT pg_create_physical_replication_slot('$slotname_1');]), 0, 'physical slot created on master');
-$node_standby_1->append_conf('recovery.conf', "primary_slot_name = $slotname_1\n");
-$node_standby_1->append_conf('postgresql.conf', "wal_receiver_status_interval = 1\n");
-$node_standby_1->append_conf('postgresql.conf', "max_replication_slots = 4\n");
+$node_standby_1->append_conf('recovery.conf', "primary_slot_name = $slotname_1");
+$node_standby_1->append_conf('postgresql.conf', "wal_receiver_status_interval = 1");
+$node_standby_1->append_conf('postgresql.conf', "max_replication_slots = 4");
 $node_standby_1->restart;
 is($node_standby_1->psql('postgres', qq[SELECT pg_create_physical_replication_slot('$slotname_2');]), 0, 'physical slot created on intermediate replica');
-$node_standby_2->append_conf('recovery.conf', "primary_slot_name = $slotname_2\n");
-$node_standby_2->append_conf('postgresql.conf', "wal_receiver_status_interval = 1\n");
+$node_standby_2->append_conf('recovery.conf', "primary_slot_name = $slotname_2");
+$node_standby_2->append_conf('postgresql.conf', "wal_receiver_status_interval = 1");
 $node_standby_2->restart;
 
 sub get_slot_xmins
diff --git a/src/test/recovery/t/002_archiving.pl b/src/test/recovery/t/002_archiving.pl
index 83b43bf84d4..e4a643d82d2 100644
--- a/src/test/recovery/t/002_archiving.pl
+++ b/src/test/recovery/t/002_archiving.pl
@@ -23,10 +23,8 @@ $node_master->backup($backup_name);
 my $node_standby = get_new_node('standby');
 $node_standby->init_from_backup($node_master, $backup_name,
 	has_restoring => 1);
-$node_standby->append_conf(
-	'postgresql.conf', qq(
-wal_retrieve_retry_interval = '100ms'
-));
+$node_standby->append_conf('postgresql.conf',
+	"wal_retrieve_retry_interval = '100ms'");
 $node_standby->start;
 
 # Create some content on master
diff --git a/src/test/recovery/t/003_recovery_targets.pl b/src/test/recovery/t/003_recovery_targets.pl
index b7b0caae687..203a46419e0 100644
--- a/src/test/recovery/t/003_recovery_targets.pl
+++ b/src/test/recovery/t/003_recovery_targets.pl
@@ -23,9 +23,7 @@ sub test_recovery_standby
 	foreach my $param_item (@$recovery_params)
 	{
 		$node_standby->append_conf(
-			'recovery.conf',
-			qq($param_item
-));
+			'recovery.conf', qq($param_item));
 	}
 
 	$node_standby->start;