diff --git a/src/bin/pgbench/t/002_pgbench_no_server.pl b/src/bin/pgbench/t/002_pgbench_no_server.pl
index 9023fac52d..a3608ae5fc 100644
--- a/src/bin/pgbench/t/002_pgbench_no_server.pl
+++ b/src/bin/pgbench/t/002_pgbench_no_server.pl
@@ -26,7 +26,10 @@ sub pgbench
 	local $Test::Builder::Level = $Test::Builder::Level + 1;
 
 	my ($opts, $stat, $out, $err, $name) = @_;
-	print STDERR "opts=$opts, stat=$stat, out=$out, err=$err, name=$name";
+	print STDERR "opts=$opts, stat=$stat, " .
+	    "out=" . join(' ', @{$out}) . ", " .
+	    "err=" . join(' ', @{$err}) . ", " .
+	    "name=$name\n";
 	command_checks_all([ 'pgbench', split(/\s+/, $opts) ],
 		$stat, $out, $err, $name);
 	return;