diff --git a/Tests/Cosmos.TestRunner.Core/Cosmos.TestRunner.Core.csproj b/Tests/Cosmos.TestRunner.Core/Cosmos.TestRunner.Core.csproj
index d0e1ef6a2..d0e713abb 100644
--- a/Tests/Cosmos.TestRunner.Core/Cosmos.TestRunner.Core.csproj
+++ b/Tests/Cosmos.TestRunner.Core/Cosmos.TestRunner.Core.csproj
@@ -58,6 +58,7 @@
         <ProjectReference Include="..\Cosmos.Compiler.Tests.MethodTests\Cosmos.Compiler.Tests.MethodTests.csproj" />
         <ProjectReference Include="..\Cosmos.Compiler.Tests.SimpleWriteLine\Cosmos.Compiler.Tests.SimpleWriteLine.csproj" />
         <ProjectReference Include="..\Cosmos.Compiler.Tests.SingleEchoTest\Cosmos.Compiler.Tests.SingleEchoTest.csproj" />
+        <ProjectReference Include="..\Cosmos.Compiler.Tests.TypeSystem\Cosmos.Compiler.Tests.TypeSystem.csproj" />
         <ProjectReference Include="..\Cosmos.Kernel.Tests.Fat\Cosmos.Kernel.Tests.Fat.csproj" />
         <ProjectReference Include="..\Cosmos.Kernel.Tests.IO\Cosmos.Kernel.Tests.IO.csproj" />
         <ProjectReference Include="..\Cosmos.TestRunner.TestController\Cosmos.TestRunner.TestController.csproj" />