--- a/h2_proxy_protocol.t
+++ b/h2_proxy_protocol.t
@@ -39,7 +39,7 @@ http {
     %%TEST_GLOBALS_HTTP%%
 
     server {
-        listen       127.0.0.1:8081 proxy_protocol http2;
+        listen       127.0.0.1:%%PORT_0%% proxy_protocol http2;
         server_name  localhost;
 
         location /pp {
@@ -59,7 +59,7 @@ EOF
 ###############################################################################
 
 my $proxy = 'PROXY TCP4 192.0.2.1 192.0.2.2 1234 5678' . CRLF;
-my $s = Test::Nginx::HTTP2->new(8081, proxy => $proxy);
+my $s = Test::Nginx::HTTP2->new(port(0), proxy => $proxy);
 my $sid = $s->new_stream({ path => '/pp' });
 my $frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
 
@@ -70,7 +70,7 @@ is($frame->{headers}->{'x-pp'}, '192.0.2
 # invalid PROXY protocol string
 
 $proxy = 'BOGUS TCP4 192.0.2.1 192.0.2.2 1234 5678' . CRLF;
-$s = Test::Nginx::HTTP2->new(8081, preface => $proxy, pure => 1);
+$s = Test::Nginx::HTTP2->new(port(0), preface => $proxy, pure => 1);
 $frames = $s->read(all => [{ type => 'GOAWAY' }]);
 
 ($frame) = grep { $_->{type} eq "GOAWAY" } @$frames;