diff --git a/osu.Game.Tests/Chat/MessageFormatterTests.cs b/osu.Game.Tests/Chat/MessageFormatterTests.cs
new file mode 100644
index 0000000000..0fc3054f44
--- /dev/null
+++ b/osu.Game.Tests/Chat/MessageFormatterTests.cs
@@ -0,0 +1,189 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using NUnit.Framework;
+using osu.Game.Online.Chat;
+
+namespace osu.Game.Tests.Chat
+{
+    [TestFixture]
+    public class MessageFormatterTests
+    {
+        [Test]
+        public void TestBareLink()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a http://www.basic-link.com/?test=test." });
+
+            Assert.AreEqual("This is a http://www.basic-link.com/?test=test.", result.DisplayContent);
+            Assert.AreEqual(1, result.Links.Count);
+            Assert.AreEqual("http://www.basic-link.com/?test=test", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(36, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestMultipleComplexLinks()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a http://test.io/link#fragment. (see https://twitter.com). Also, This string should not be altered. http://example.com/" });
+
+            Assert.AreEqual("This is a http://test.io/link#fragment. (see https://twitter.com). Also, This string should not be altered. http://example.com/", result.DisplayContent);
+            Assert.AreEqual(3, result.Links.Count);
+
+            Assert.AreEqual("http://test.io/link#fragment", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(28, result.Links[0].Length);
+
+            Assert.AreEqual("https://twitter.com", result.Links[1].Url);
+            Assert.AreEqual(45, result.Links[1].Index);
+            Assert.AreEqual(19, result.Links[1].Length);
+
+            Assert.AreEqual("http://example.com/", result.Links[2].Url);
+            Assert.AreEqual(108, result.Links[2].Index);
+            Assert.AreEqual(19, result.Links[2].Length);
+        }
+
+        [Test]
+        public void TestAjaxLinks()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "https://twitter.com/#!/hashbanglinks" });
+
+            Assert.AreEqual("https://twitter.com/#!/hashbanglinks", result.DisplayContent);
+            Assert.AreEqual(0, result.Links[0].Index);
+            Assert.AreEqual(36, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestUnixHomeLinks()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "http://www.chiark.greenend.org.uk/~sgtatham/putty/" });
+
+            Assert.AreEqual("http://www.chiark.greenend.org.uk/~sgtatham/putty/", result.DisplayContent);
+            Assert.AreEqual(0, result.Links[0].Index);
+            Assert.AreEqual(50, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestCaseInsensitiveLinks()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "look: http://puu.sh/7Ggh8xcC6/asf0asd9876.NEF" });
+
+            Assert.AreEqual("look: http://puu.sh/7Ggh8xcC6/asf0asd9876.NEF", result.DisplayContent);
+            Assert.AreEqual(6, result.Links[0].Index);
+            Assert.AreEqual(39, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestWikiLink()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a [[Wiki Link]]." });
+
+            Assert.AreEqual("This is a Wiki Link.", result.DisplayContent);
+            Assert.AreEqual(1, result.Links.Count);
+            Assert.AreEqual("https://osu.ppy.sh/wiki/Wiki Link", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(9, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestMultiWikiLink()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a [[Wiki Link]] [[Wiki:Link]][[Wiki.Link]]." });
+
+            Assert.AreEqual("This is a Wiki Link Wiki:LinkWiki.Link.", result.DisplayContent);
+            Assert.AreEqual(3, result.Links.Count);
+
+            Assert.AreEqual("https://osu.ppy.sh/wiki/Wiki Link", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(9, result.Links[0].Length);
+
+            Assert.AreEqual("https://osu.ppy.sh/wiki/Wiki:Link", result.Links[1].Url);
+            Assert.AreEqual(20, result.Links[1].Index);
+            Assert.AreEqual(9, result.Links[1].Length);
+
+            Assert.AreEqual("https://osu.ppy.sh/wiki/Wiki.Link", result.Links[2].Url);
+            Assert.AreEqual(29, result.Links[2].Index);
+            Assert.AreEqual(9, result.Links[2].Length);
+        }
+
+        [Test]
+        public void TestOldFormatLink()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a (simple test)[https://osu.ppy.sh]." });
+
+            Assert.AreEqual("This is a simple test.", result.DisplayContent);
+            Assert.AreEqual(1, result.Links.Count);
+            Assert.AreEqual("https://osu.ppy.sh", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(11, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestNewFormatLink()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a [https://osu.ppy.sh simple test]." });
+
+            Assert.AreEqual("This is a simple test.", result.DisplayContent);
+            Assert.AreEqual(1, result.Links.Count);
+            Assert.AreEqual("https://osu.ppy.sh", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(11, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestRecursiveBreaking()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a [https://osu.ppy.sh [[simple test]]]." });
+
+            Assert.AreEqual("This is a [[simple test]].", result.DisplayContent);
+            Assert.AreEqual(1, result.Links.Count);
+            Assert.AreEqual("https://osu.ppy.sh", result.Links[0].Url);
+            Assert.AreEqual(10, result.Links[0].Index);
+            Assert.AreEqual(15, result.Links[0].Length);
+        }
+
+        [Test]
+        public void TestLinkComplex()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a [http://www.simple-test.com simple test] with some [traps] and [[wiki links]]. Don't forget to visit https://osu.ppy.sh (now!)[http://google.com]\uD83D\uDE12" });
+
+            Assert.AreEqual("This is a simple test with some [traps] and wiki links. Don't forget to visit https://osu.ppy.sh now!\0\0\0", result.DisplayContent);
+            Assert.AreEqual(5, result.Links.Count);
+
+            Link f = result.Links.Find(l => l.Url == "https://osu.ppy.sh/wiki/wiki links");
+            Assert.AreEqual(44, f.Index);
+            Assert.AreEqual(10, f.Length);
+
+            f = result.Links.Find(l => l.Url == "http://www.simple-test.com");
+            Assert.AreEqual(10, f.Index);
+            Assert.AreEqual(11, f.Length);
+
+            f = result.Links.Find(l => l.Url == "http://google.com");
+            Assert.AreEqual(97, f.Index);
+            Assert.AreEqual(4, f.Length);
+
+            f = result.Links.Find(l => l.Url == "https://osu.ppy.sh");
+            Assert.AreEqual(78, f.Index);
+            Assert.AreEqual(18, f.Length);
+
+            f = result.Links.Find(l => l.Url == "\uD83D\uDE12");
+            Assert.AreEqual(101, f.Index);
+            Assert.AreEqual(3, f.Length);
+        }
+
+        [Test]
+        public void TestEmoji()
+        {
+            Message result = MessageFormatter.FormatMessage(new Message { Content = "Hello world\uD83D\uDE12<--This is an emoji,There are more:\uD83D\uDE10\uD83D\uDE00,\uD83D\uDE20" });
+            Assert.AreEqual("Hello world\0\0\0<--This is an emoji,There are more:\0\0\0\0\0\0,\0\0\0", result.DisplayContent);
+            Assert.AreEqual(result.Links.Count, 4);
+            Assert.AreEqual(result.Links[0].Index, 11);
+            Assert.AreEqual(result.Links[1].Index, 49);
+            Assert.AreEqual(result.Links[2].Index, 52);
+            Assert.AreEqual(result.Links[3].Index, 56);
+            Assert.AreEqual(result.Links[0].Url, "\uD83D\uDE12");
+            Assert.AreEqual(result.Links[1].Url, "\uD83D\uDE10");
+            Assert.AreEqual(result.Links[2].Url, "\uD83D\uDE00");
+            Assert.AreEqual(result.Links[3].Url, "\uD83D\uDE20");
+        }
+    }
+}
diff --git a/osu.Game.Tests/osu.Game.Tests.csproj b/osu.Game.Tests/osu.Game.Tests.csproj
index f308100d2c..8f5fd3587a 100644
--- a/osu.Game.Tests/osu.Game.Tests.csproj
+++ b/osu.Game.Tests/osu.Game.Tests.csproj
@@ -90,6 +90,7 @@
     <Compile Include="Beatmaps\Formats\LegacyStoryboardDecoderTest.cs" />
     <Compile Include="Beatmaps\IO\OszArchiveReaderTest.cs" />
     <Compile Include="Beatmaps\IO\ImportBeatmapTest.cs" />
+    <Compile Include="Chat\MessageFormatterTests.cs" />
     <Compile Include="Resources\Resource.cs" />
     <Compile Include="Beatmaps\Formats\LegacyBeatmapDecoderTest.cs" />
     <Compile Include="Visual\TestCaseBeatmapCarousel.cs" />