diff --git a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/Tests/GroupsModuleTests.cs b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/Tests/GroupsModuleTests.cs
new file mode 100644
index 0000000000..f9a736fb1c
--- /dev/null
+++ b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/Tests/GroupsModuleTests.cs
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Reflection;
+using NUnit.Framework;
+using NUnit.Framework.SyntaxHelpers;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Framework.Communications;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Tests.Common;
+using OpenSim.Tests.Common.Mock;
+using OpenSim.Tests.Common.Setup;
+
+namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups.Tests
+{
+    /// <summary>
+    /// Basic groups module tests
+    /// </summary>
+    [TestFixture]
+    public class GroupsModuleTests
+    {
+        [Test]
+        public void TestBasic()
+        {
+            TestHelper.InMethod();
+        }
+    }
+}
\ No newline at end of file
diff --git a/prebuild.xml b/prebuild.xml
index 9f2ef432d0..044770a374 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -2974,6 +2974,62 @@
       </Files>
     </Project>
 
+    <Project frameworkVersion="v3_5" name="OpenSim.Region.OptionalModules.Tests" path="OpenSim/Region/OptionalModules" type="Library">
+      <Configuration name="Debug">
+        <Options>
+          <OutputPath>../../../bin/</OutputPath>
+        </Options>
+      </Configuration>
+      <Configuration name="Release">
+        <Options>
+          <OutputPath>../../../bin/</OutputPath>
+        </Options>
+      </Configuration>
+
+      <ReferencePath>../../../bin/</ReferencePath>
+      <Reference name="System"/>
+      <Reference name="System.Core"/>
+      <Reference name="System.Xml"/>
+      <Reference name="System.Drawing"/>
+      <Reference name="OpenMetaverseTypes" path="../../../bin/"/>
+      <Reference name="OpenMetaverse" path="../../../bin/"/>
+      <Reference name="OpenSim.Data"/>
+      <Reference name="OpenSim.Framework"/>
+      <Reference name="OpenSim.Framework.Serialization"/>
+      <Reference name="OpenSim.Framework.Communications"/>
+      <Reference name="OpenSim.Framework.Console"/>
+      <Reference name="OpenSim.Framework.Servers"/>
+      <Reference name="OpenSim.Framework.Servers.HttpServer"/>
+      <Reference name="OpenSim.Framework.Statistics"/>
+      <Reference name="OpenSim.Region.Framework"/>
+      <Reference name="OpenSim.Region.CoreModules"/>
+      <Reference name="OpenSim.Region.Physics.Manager"/>
+      <Reference name="OpenSim.Services.Interfaces"/>
+
+      <!-- Unit tests -->
+      <Reference name="OpenSim.Tests.Common"/>
+      <Reference name="Nini" path="../../../bin/"/>
+      <Reference name="nunit.framework" path="../../../bin/"/>
+
+      <!-- For scripting in funny languages by default -->
+      <Reference name="XMLRPC" path="../../../bin/"/>
+      <Reference name="OpenSim.Framework.Communications"/>
+      <Reference name="Nini" path="../../../bin/"/>
+      <Reference name="log4net" path="../../../bin/"/>
+      <Reference name="DotNetOpenMail" path="../../../bin/"/>
+
+      <!--
+           TODO: this is kind of lame, we basically build a duplicate
+           assembly but with tests added in, just so that we don't
+           need to hard code in a bunch of Test directories here.  If
+           pattern="Tests/*.cs" worked, we wouldn't need this.
+      -->
+      <Files>
+        <!-- SADLY the way this works means you need to keep adding these paths -->
+        <Match path="Avatar/XmlRpcGroups/Tests" pattern="*.cs" recurse="true"/>
+      </Files>
+    </Project>
+
     <Project frameworkVersion="v3_5" name="OpenSim.Region.Framework.Tests" path="OpenSim/Region/Framework" type="Library">
       <Configuration name="Debug">
         <Options>