diff --git a/XSharp/source/XSharp.Test/XSharp.Test/XSharp.Test.csproj b/XSharp/source/XSharp.Test/XSharp.Test/XSharp.Test.csproj
index e7d8c73f2..ca25ab22e 100644
--- a/XSharp/source/XSharp.Test/XSharp.Test/XSharp.Test.csproj
+++ b/XSharp/source/XSharp.Test/XSharp.Test/XSharp.Test.csproj
@@ -93,6 +93,12 @@
       <DesignTimeSharedInput>True</DesignTimeSharedInput>
     </Compile>
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\..\source2\Compiler\Cosmos.XSharp\Cosmos.Compiler.XSharp.csproj">
+      <Project>{A281A1B1-C718-4BCB-A7BE-ED840A70449A}</Project>
+      <Name>Cosmos.Compiler.XSharp</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.