diff --git a/src/test/recovery/t/004_timeline_switch.pl b/src/test/recovery/t/004_timeline_switch.pl
index 5afd2f44466..85df9ad422c 100644
--- a/src/test/recovery/t/004_timeline_switch.pl
+++ b/src/test/recovery/t/004_timeline_switch.pl
@@ -48,10 +48,11 @@ $node_standby_1->psql(
 is($psql_out, 't', "promotion of standby with pg_promote");
 
 # Switch standby 2 to replay from standby 1
+my $secret = 'dont_show_me';
 my $connstr_1 = $node_standby_1->connstr;
 $node_standby_2->append_conf(
 	'postgresql.conf', qq(
-primary_conninfo='$connstr_1'
+primary_conninfo='$connstr_1 password=$secret'
 ));
 
 # Rotate logfile before restarting, for the log checks done below.
@@ -62,9 +63,9 @@ $node_standby_2->restart;
 # verify that after reconnection, the walreceiver stays alive during
 # the timeline switch.
 $node_standby_2->poll_query_until('postgres',
-	"SELECT EXISTS(SELECT 1 FROM pg_stat_wal_receiver)");
+	"SELECT EXISTS(SELECT 1 FROM pg_stat_activity WHERE backend_type = 'walreceiver')");
 my $wr_pid_before_switch = $node_standby_2->safe_psql('postgres',
-	"SELECT pid FROM pg_stat_wal_receiver");
+	"SELECT pid FROM pg_stat_activity WHERE backend_type = 'walreceiver'");
 
 # Insert some data in standby 1 and check its presence in standby 2
 # to ensure that the timeline switch has been done.
@@ -88,11 +89,19 @@ ok( !$node_standby_2->log_contains(
 # Verify that the walreceiver process stayed alive across the timeline
 # switch, check its PID.
 my $wr_pid_after_switch = $node_standby_2->safe_psql('postgres',
-	"SELECT pid FROM pg_stat_wal_receiver");
+	"SELECT pid FROM pg_stat_activity WHERE backend_type = 'walreceiver'");
 
 is($wr_pid_before_switch, $wr_pid_after_switch,
 	'WAL receiver PID matches across timeline jumps');
 
+my $raw_conninfo_count = $node_standby_2->safe_psql(
+	'postgres',
+	"SELECT count(*) FROM pg_stat_wal_receiver WHERE conninfo LIKE '%$secret%'");
+
+is(
+	$raw_conninfo_count, '0',
+	'raw primary_conninfo password is not visible after timeline jumps');
+
 # Ensure that a standby is able to follow a primary on a newer timeline
 # when WAL archiving is enabled.