new file mode 100644
--- /dev/null
+++ b/realip_hostname.t
@@ -0,0 +1,85 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for nginx realip module, 'unix:' and hostname in set_real_ip_from.
+
+###############################################################################
+
+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 $t = Test::Nginx->new()->has(qw/http realip proxy unix/);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    server {
+        listen       127.0.0.1:8080;
+        listen       unix:%%TESTDIR%%/unix.sock;
+        server_name  localhost;
+
+        location /1 {
+            set_real_ip_from  localhost;
+            add_header X-IP $remote_addr;
+        }
+
+        location /2 {
+            set_real_ip_from  unix:;
+            add_header X-IP $remote_addr;
+        }
+
+        location /unix {
+            proxy_pass http://unix:%%TESTDIR%%/unix.sock:/;
+            proxy_set_header X-Real-IP 192.0.2.1;
+        }
+
+        location /ip {
+            proxy_pass http://127.0.0.1:8080/;
+            proxy_set_header X-Real-IP 192.0.2.1;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('1', '');
+$t->write_file('2', '');
+$t->try_run('no realip hostnames support');
+
+plan(skip_all => 'no 127.0.0.1 on host')
+	if http_get('/1') !~ /X-IP: 127.0.0.1/m;
+
+$t->plan(4);
+
+###############################################################################
+
+like(http_get('/unix/2'), qr/X-IP: 192.0.2.1/, 'realip unix');
+unlike(http_get('/unix/1'), qr/X-IP: 192.0.2.1/, 'realip unix - no match');
+
+like(http_get('/ip/1'), qr/X-IP: 192.0.2.1/, 'realip hostname');
+unlike(http_get('/ip/2'), qr/X-IP: 192.0.2.1/, 'realip hostname - no match');
+
+###############################################################################