new file mode 100644
--- /dev/null
+++ b/fastcgi_buffering.t
@@ -0,0 +1,108 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Test for fastcgi backend with fastcgi_buffering off.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+use Socket qw/ CRLF /;
+
+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';
+
+my $t = Test::Nginx->new()->has(qw/http fastcgi ssi/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location / {
+            fastcgi_pass 127.0.0.1:8081;
+            fastcgi_param REQUEST_URI $request_uri;
+            fastcgi_buffering off;
+        }
+
+        location /inmemory.html {
+            ssi on;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('inmemory.html',
+	'<!--#include virtual="/include$request_uri" set="x" -->' .
+	'set: <!--#echo var="x" -->');
+
+$t->run_daemon(\&fastcgi_daemon);
+
+eval {
+	open OLDERR, ">&", \*STDERR; close STDERR;
+	$t->run();
+	open STDERR, ">&", \*OLDERR;
+};
+plan(skip_all => 'no fastcgi_buffering') if $@;
+
+$t->plan(2)->waitforsocket('127.0.0.1:8081');
+
+###############################################################################
+
+like(http_get('/'), qr/SEE-THIS/, 'fastcgi unbuffered');
+like(http_get('/inmemory.html'), qr/set: SEE-THIS/, 'fastcgi inmemory');
+
+###############################################################################
+
+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 ) {
+		$count++;
+
+		# this intentionally uses multiple print()'s to test
+		# parsing of multiple records
+
+		print(
+			"Status: 200 OK" . CRLF .
+			"Content-Type: text/plain" . CRLF . CRLF
+		);
+
+		print "SEE";
+		print "-THIS" . CRLF;
+		print "$count" . CRLF;
+	}
+
+	FCGI::CloseSocket($socket);
+}
+
+###############################################################################