new file mode 100644
--- /dev/null
+++ b/upstream_zone.t
@@ -0,0 +1,90 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for upstream zone.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->has(qw/http proxy upstream_zone/)->plan(2)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    upstream u {
+        zone u 1m;
+        server 127.0.0.1:8081;
+    }
+
+    upstream u2 {
+        zone u;
+        server 127.0.0.1:8081 down;
+        server 127.0.0.1:8081 backup down;
+    }
+
+    server {
+        listen       127.0.0.1:8081;
+        server_name  localhost;
+
+        location / {}
+    }
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        add_header X-Name $upstream_addr always;
+
+        location / {
+            proxy_pass http://u/;
+        }
+
+        location /down {
+            proxy_pass http://u2/;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('index.html', '');
+$t->run();
+
+###############################################################################
+
+my $p = port(8081);
+
+TODO: {
+todo_skip 'leaves coredump', 2 unless $^O ne 'MSWin32'
+	or $ENV{TEST_NGINX_UNSAFE} or $t->has_version('1.13.4');
+
+like(http_get('/'), qr/X-Name: 127.0.0.1:$p/, 'upstream name');
+like(http_get('/down'), qr/X-Name: u2/, 'no live upstreams');
+
+}
+
+###############################################################################