diff --git a/worker_shutdown_timeout.t b/worker_shutdown_timeout.t
index 8bdd828..ca81298 100644
--- a/worker_shutdown_timeout.t
+++ b/worker_shutdown_timeout.t
@@ -56,6 +56,8 @@
 
 my $s = http('', start => 1);
 
+select undef, undef, undef, 0.2;
+
 kill 'HUP', $t->read_file('nginx.pid');
 
 if (IO::Select->new($s)->can_read(5)) {