Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.TestUtil.Test/Ringtoets.AssemblyTool.IO.TestUtil.Test.csproj
===================================================================
diff -u -r0aa5b0a377483e4042760e4c88bc6a8dd43570ff -r46c6e661ed805f0fe44e3a70e865415cf57f0cf6
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.TestUtil.Test/Ringtoets.AssemblyTool.IO.TestUtil.Test.csproj	(.../Ringtoets.AssemblyTool.IO.TestUtil.Test.csproj)	(revision 0aa5b0a377483e4042760e4c88bc6a8dd43570ff)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.TestUtil.Test/Ringtoets.AssemblyTool.IO.TestUtil.Test.csproj	(.../Ringtoets.AssemblyTool.IO.TestUtil.Test.csproj)	(revision 46c6e661ed805f0fe44e3a70e865415cf57f0cf6)
@@ -7,16 +7,27 @@
   </PropertyGroup>
   <Import Project="$(SolutionDir)\build\Ringtoets_Test.targets" />
   <ItemGroup>
+    <Reference Include="nunit.framework, Version=3.8.1.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
+      <HintPath>..\..\..\..\packages\NUnit.3.8.1\lib\net40\nunit.framework.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="InvalidIdTestHelperTest.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\..\..\build\Copying.licenseheader">
       <Link>Copying.licenseheader</Link>
     </None>
+    <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Ringtoets.AssemblyTool.IO.TestUtil\Ringtoets.AssemblyTool.IO.TestUtil.csproj">
+      <Project>{C7023D25-F8DF-4E3F-BF5D-A8F961CC63F7}</Project>
+      <Name>Ringtoets.AssemblyTool.IO.TestUtil</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file