--- a/upstream_random.t
+++ b/upstream_random.t
@@ -153,7 +153,7 @@ my @ports = my ($port1, $port2) = (port(
 like(http_get('/'), qr/X-Port: ($port1|$port2)/, 'random');
 like(http_get('/lc/'), qr/X-Port: ($port1|$port2)/, 'random two');
 
-my $s = http_get('/lc/w', start => 1, sleep => 0.2);
+my $s = http_get('/lc/w', start => 1, sleep => 0.5);
 my $r = http_get('/lc/');
 my ($p) = http_end($s) =~ /X-Port: (\d+)/;
 like($r, qr/X-Port: (?!$p)/, 'random wait');