new file mode 100644
--- /dev/null
+++ b/stream_udp_proxy.t
@@ -0,0 +1,101 @@
+#!/usr/bin/perl
+
+# (C) Nginx, Inc.
+
+# Tests for stream proxy module with datagrams.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+use Test::Nginx::Stream qw/ dgram /;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->has(qw/stream/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+stream {
+    proxy_timeout        1s;
+
+    server {
+        listen           127.0.0.1:8080 udp;
+        proxy_pass       127.0.0.1:8081;
+
+        proxy_responses  0;
+    }
+
+    server {
+        listen           127.0.0.1:8082 udp;
+        proxy_pass       127.0.0.1:8081;
+
+        proxy_responses  2;
+    }
+
+    server {
+        listen           127.0.0.1:8083 udp;
+        proxy_pass       127.0.0.1:8081;
+    }
+}
+
+EOF
+
+
+$t->run_daemon(\&udp_daemon, 8081, $t);
+$t->try_run('no stream udp')->plan(5);
+$t->waitforfile($t->testdir . '/8081');
+
+###############################################################################
+
+my $s = dgram('127.0.0.1:8080');
+is($s->io('1', read => 1), '', 'proxy responses 0');
+
+$s = dgram('127.0.0.1:8082');
+is($s->io('1'), '1', 'proxy responses 1');
+is($s->io('2', read => 2), '12', 'proxy responses 2');
+is($s->io('3', read => 3), '12', 'proxy responses 3');
+
+$s = dgram('127.0.0.1:8083');
+is($s->io('3', read => 3), '123', 'proxy responses default');
+
+###############################################################################
+
+sub udp_daemon {
+	my ($port, $t) = @_;
+
+	my $server = IO::Socket::INET->new(
+		Proto => 'udp',
+		LocalAddr => "127.0.0.1:$port",
+		Reuse => 1,
+	)
+		or die "Can't create listening socket: $!\n";
+
+	# signal we are ready
+
+	open my $fh, '>', $t->testdir() . '/' . $port;
+	close $fh;
+
+	while (1) {
+		$server->recv(my $buffer, 65536);
+		$server->send($_) for (1 .. $buffer);
+	}
+}
+
+###############################################################################