t/check-www-inbox.perl | 1 +

diff --git a/t/check-www-inbox.perl b/t/check-www-inbox.perl
index 0a6d61bb5997a2fafbb19ef2dfd56386d3f103c3..db292c5064a252b48c316b6e4d3d7d43a023a7b0 100644
--- a/t/check-www-inbox.perl
+++ b/t/check-www-inbox.perl
@@ -151,6 +151,7 @@ 	my ($todo_rd, $done_wr) = @_;
 	$SIG{CHLD} = 'DEFAULT';
 	my $m = WWW::Mechanize->new(autocheck => 0);
 	my $cc = LWP::ConnCache->new;
+	$m->stack_depth(0); # no history
 	$m->conn_cache($cc);
 	while (1) {
 		$todo_rd->recv(my $u, 65535, 0);