Build fix?

tests/Avalonia.RenderTests/Avalonia.Skia.RenderTests.csproj

@@ -24,6 +24,16 @@
     <ProjectReference Include="..\..\src\Avalonia.Themes.Default\Avalonia.Themes.Default.csproj" />
     <ProjectReference Include="..\..\src\Skia\Avalonia.Skia\Avalonia.Skia.csproj"/>
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net461'">
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
   <Import Project="..\..\build\Moq.props" />
   <Import Project="..\..\build\Rx.props" />
   <Import Project="..\..\build\XUnit.props" />