$check_rethread->('3-headed-monster twice');
my $rdr = { 2 => \(my $err = '') };
-ok(run_script([qw(-index --reindex --xapian-only), $inboxdir], undef, $rdr),
+my $env = { PI_CONFIG => '/dev/null' };
+ok(run_script([qw(-index --reindex --xapian-only), $inboxdir], $env, $rdr),
'--xapian-only works');
is($err, '', 'no errors from --xapian-only');