new file mode 100644
--- /dev/null
+++ b/proxy-xar.t
@@ -0,0 +1,87 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Tests for proxy X-Accel-Redirect functionality.
+
+###############################################################################
+
+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 $t = Test::Nginx->new()->has('rewrite')->plan(8);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+master_process off;
+daemon         off;
+
+events {
+}
+
+http {
+    access_log    off;
+    root          %%TESTDIR%%;
+
+    client_body_temp_path  %%TESTDIR%%/client_body_temp;
+    fastcgi_temp_path      %%TESTDIR%%/fastcgi_temp;
+    proxy_temp_path        %%TESTDIR%%/proxy_temp;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location /proxy {
+            proxy_pass http://127.0.0.1:8080/return-xar;
+        }
+        location /return-xar {
+            add_header  X-Accel-Redirect     /index.html;
+
+            # this headers will be preserved on
+            # X-Accel-Redirect
+
+            add_header  Content-Type         text/blah;
+            add_header  Set-Cookie           blah=blah;
+            add_header  Content-Disposition  attachment;
+            add_header  Cache-Control        no-cache;
+            add_header  Expires              fake;
+            add_header  Accept-Ranges        parrots;
+
+            # others won't be
+            add_header  Something            other;
+
+            return 204;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('index.html', 'SEE-THIS');
+$t->run();
+
+###############################################################################
+
+my $r = http_get('/proxy');
+like($r, qr/SEE-THIS/, 'X-Accel-Redirect works');
+like($r, qr/^Content-Type: text\/blah/m, 'Content-Type preserved');
+like($r, qr/^Set-Cookie: blah=blah/m, 'Set-Cookie preserved');
+like($r, qr/^Content-Disposition: attachment/m, 'Content-Disposition preserved');
+like($r, qr/^Cache-Control: no-cache/m, 'Cache-Control preserved');
+like($r, qr/^Expires: fake/m, 'Expires preserved');
+like($r, qr/^Accept-Ranges: parrots/m, 'Accept-Ranges preserved');
+unlike($r, qr/^Something/m, 'other headers stripped');
+
+###############################################################################