new file mode 100644
--- /dev/null
+++ b/fastcgi_unix.t
@@ -0,0 +1,119 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Test for fastcgi backend with unix socket.
+
+###############################################################################
+
+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;
+
+eval { require FCGI; };
+plan(skip_all => 'FCGI not installed') if $@;
+plan(skip_all => 'win32') if $^O eq 'MSWin32';
+
+eval { require IO::Socket::UNIX; };
+plan(skip_all => 'IO::Socket::UNIX not installed') if $@;
+
+my $t = Test::Nginx->new()->has(qw/http fastcgi unix/)->plan(6)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    upstream u {
+        server 127.0.0.1:8081;
+    }
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location / {
+            fastcgi_pass unix:%%TESTDIR%%/unix.sock;
+            fastcgi_param REQUEST_URI $request_uri;
+        }
+
+        location /var {
+            fastcgi_pass $arg_b;
+            fastcgi_param REQUEST_URI $request_uri;
+        }
+    }
+}
+
+EOF
+
+my $path = $t->testdir() . '/unix.sock';
+
+$t->run_daemon(\&fastcgi_daemon, $path);
+$t->run();
+
+# wait for unix socket to appear
+
+for (1 .. 50) {
+	last if -S $path;
+	select undef, undef, undef, 0.1;
+}
+
+###############################################################################
+
+like(http_get('/'), qr/SEE-THIS/, 'fastcgi request');
+like(http_get('/redir'), qr/ 302 /, 'fastcgi redirect');
+like(http_get('/'), qr/^3$/m, 'fastcgi third request');
+
+unlike(http_head('/'), qr/SEE-THIS/, 'no data in HEAD');
+
+like(http_get('/stderr'), qr/SEE-THIS/, 'large stderr handled');
+
+like(http_get("/var?b=unix:$path"), qr/SEE-THIS/, 'fastcgi with variables');
+
+###############################################################################
+
+sub fastcgi_daemon {
+	my $socket = FCGI::OpenSocket(shift, 5);
+	my $request = FCGI::Request(\*STDIN, \*STDOUT, \*STDERR, \%ENV,
+		$socket);
+
+	my $count;
+	while( $request->Accept() >= 0 ) {
+		$count++;
+
+		if ($ENV{REQUEST_URI} eq '/stderr') {
+			warn "sample stderr text" x 512;
+		}
+
+		print <<EOF;
+Location: http://127.0.0.1:8080/redirect
+Content-Type: text/html
+
+SEE-THIS
+$count
+EOF
+	}
+
+	FCGI::CloseSocket($socket);
+}
+
+###############################################################################