diff --git a/stream_upstream_random.t b/stream_upstream_random.t
index d2a1b6d..87df8c6 100644
--- a/stream_upstream_random.t
+++ b/stream_upstream_random.t
@@ -182,7 +182,7 @@
 like(get(8080, '/'), qr/X-Port: ($port1|$port2)/, 'random');
 like(get(8083, '/'), qr/X-Port: ($port1|$port2)/, 'random two');
 
-my $s = get(8083, '/w', start => 1, sleep => 0.2);
+my $s = get(8083, '/w', start => 1, sleep => 0.5);
 my $r = get(8083, '/');
 my ($p) = http_end($s) =~ /X-Port: (\d+)/;
 like($r, qr/X-Port: (?!$p)/, 'random wait');
diff --git a/upstream_random.t b/upstream_random.t
index 30eafc6..0b72fa9 100644
--- a/upstream_random.t
+++ b/upstream_random.t
@@ -153,7 +153,7 @@
 like(http_get('/'), qr/X-Port: ($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');