diff --git a/test/Microsoft.Windows.CsWin32.Tests/Microsoft.Windows.CsWin32.Tests.csproj b/test/Microsoft.Windows.CsWin32.Tests/Microsoft.Windows.CsWin32.Tests.csproj
index b246b40f..86f27600 100644
--- a/test/Microsoft.Windows.CsWin32.Tests/Microsoft.Windows.CsWin32.Tests.csproj
+++ b/test/Microsoft.Windows.CsWin32.Tests/Microsoft.Windows.CsWin32.Tests.csproj
@@ -41,6 +41,7 @@
     <PackageReference Include="MessagePack" Version="2.2.85" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.10.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.1" />
+    <PackageReference Include="NuGet.Protocol" Version="5.8.0" />
     <!-- <PackageReference Include="Microsoft.Dia.Win32Metadata" Version="$(DiaMetadataVersion)" PrivateAssets="none" /> -->
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="System.Collections.Immutable" Version="5.0.0" />