new file mode 100644
--- /dev/null
+++ b/fastcgi-cache.t
@@ -0,0 +1,100 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Test for fastcgi backend with cache.
+
+###############################################################################
+
+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 $@;
+
+my $t = Test::Nginx->new()->has(qw/http fastcgi cache/)->plan(5)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+master_process off;
+daemon         off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    fastcgi_cache_path   %%TESTDIR%%/cache  levels=1:2
+                         keys_zone=NAME:10m;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location / {
+            fastcgi_pass 127.0.0.1:8081;
+            fastcgi_param REQUEST_URI $request_uri;
+            fastcgi_cache NAME;
+            fastcgi_cache_key $request_uri;
+            fastcgi_cache_valid 302 1m;
+        }
+    }
+}
+
+EOF
+
+$t->run_daemon(\&fastcgi_daemon);
+$t->run();
+
+###############################################################################
+
+like(http_get('/'), qr/SEE-THIS/, 'fastcgi request');
+like(http_get('/'), qr/SEE-THIS/, 'fastcgi request cached');
+
+unlike(http_head('/'), qr/SEE-THIS/, 'no data in cached HEAD');
+
+like(http_get('/stderr'), qr/SEE-THIS/, 'large stderr handled');
+like(http_get('/stderr'), qr/SEE-THIS/, 'large stderr cached');
+
+###############################################################################
+
+sub fastcgi_daemon {
+	my $socket = FCGI::OpenSocket('127.0.0.1:8081', 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);
+}
+
+###############################################################################