diff --git a/tests/network/all_tests.php b/tests/network/all_tests.php
index b500647f81..6305aae5b8 100644
--- a/tests/network/all_tests.php
+++ b/tests/network/all_tests.php
@@ -16,6 +16,7 @@ require_once 'test_framework/framework.php';
 require_once 'PHPUnit/TextUI/TestRunner.php';
 
 require_once 'network/checkdnsrr.php';
+require_once 'network/ip_normalise.php';
 
 class phpbb_network_all_tests
 {
@@ -29,6 +30,7 @@ class phpbb_network_all_tests
 		$suite = new PHPUnit_Framework_TestSuite('phpBB Network Functions');
 
 		$suite->addTestSuite('phpbb_network_checkdnsrr_test');
+		$suite->addTestSuite('phpbb_network_ip_normalise_test');
 
 		return $suite;
 	}
diff --git a/tests/network/ip_normalise.php b/tests/network/ip_normalise.php
new file mode 100644
index 0000000000..53d41e9371
--- /dev/null
+++ b/tests/network/ip_normalise.php
@@ -0,0 +1,65 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2010 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+require_once 'test_framework/framework.php';
+require_once '../phpBB/includes/functions.php';
+
+class phpbb_network_ip_normalise_test extends phpbb_test_case
+{
+	public function data_provider()
+	{
+		return array(
+			// From: A Recommendation for IPv6 Address Text Representation
+			// http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-07
+
+			// Section 4: A Recommendation for IPv6 Text Representation
+			// Section 4.1: Handling Leading Zeros in a 16 Bit Field
+			array('2001:0db8::0001', '2001:db8::1'),
+
+			// Section 4.2: "::" Usage
+			// Section 4.2.1: Shorten As Much As Possible
+			array('2001:db8::0:1', '2001:db8::1'),
+
+			// Section 4.2.2: Handling One 16 Bit 0 Field
+			array('2001:db8::1:1:1:1:1', '2001:db8:0:1:1:1:1:1'),
+
+			// Section 4.2.3: Choice in Placement of "::"
+			array('2001:db8:0:0:1:0:0:1', '2001:db8::1:0:0:1'),
+
+			// Section 4.3: Lower Case
+			array('2001:DB8::1', '2001:db8::1'),
+
+			// Section 5: Text Representation of Special Addresses
+			// We want to show IPv4-mapped addresses as plain IPv4 addresses, though.
+			array('::ffff:192.168.0.1',			'192.168.0.1'),
+			array('0000::0000:ffff:c000:0280',	'192.0.2.128'),
+
+			// IPv6 addresses with the last 32-bit written in dotted-quad notation
+			// should be converted to hex-only IPv6 addresses.
+			array('2001:db8::192.0.2.128', '2001:db8::c000:280'),
+
+			// Any string not passing the IPv4 or IPv6 regular expression
+			// is supposed to result in false being returned.
+			// Valid and invalid IP addresses are tested in 
+			// tests/regex/ipv4.php and tests/regex/ipv6.php.
+			array('', false),
+			array('192.168.1.256', false),
+			array('::ffff:192.168.255.256', false),
+			array('::1111:2222:3333:4444:5555:6666::', false),
+		);
+	}
+
+	/**
+	* @dataProvider data_provider
+	*/
+	public function test_ip_normalise($ip_address, $expected)
+	{
+		$this->assertEquals($expected, phpbb_ip_normalise($ip_address));
+	}
+}