This should fix the skia render tests (works on my machine).

tests/Avalonia.RenderTests/.gitignore

@@ -0,0 +1 @@
+obj-Skia/

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

@@ -1,4 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project>
+  <PropertyGroup>
+    <BaseIntermediateOutputPath>obj-Skia</BaseIntermediateOutputPath>
+  </PropertyGroup>
+  
+  <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
+  
   <PropertyGroup>
     <TargetFrameworks>netcoreapp1.1;net461</TargetFrameworks>
     <Platform Condition="'$(TargetFramework)' == 'net461'">x86</Platform>
@@ -8,6 +14,10 @@
     <DefineConstants>$(DefineConstants);AVALONIA_SKIA;AVALONIA_SKIA_SKIP_FAIL</DefineConstants>
     <OutputType>Library</OutputType>
   </PropertyGroup>
+  <ItemGroup>
+    <EmbeddedResource Remove="obj\**" />
+    <None Remove="obj\**" />
+  </ItemGroup>
   <ItemGroup>
     <ProjectReference Condition="'$(TargetFramework)' == 'net461'" Include="..\..\src\Avalonia.DotNetFrameworkRuntime\Avalonia.DotNetFrameworkRuntime.csproj" />
     <ProjectReference Condition="'$(TargetFramework)' == 'netcoreapp1.1'" Include="..\..\src\Avalonia.DotNetCoreRuntime\Avalonia.DotNetCoreRuntime.csproj" />
@@ -24,26 +34,12 @@
     <ProjectReference Include="..\..\src\Avalonia.Themes.Default\Avalonia.Themes.Default.csproj" />
     <ProjectReference Include="..\..\src\Skia\Avalonia.Skia\Avalonia.Skia.csproj" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'net461'">
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Xml" />
-  </ItemGroup>
-  <ItemGroup>
-    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
-  </ItemGroup>
   <Import Project="..\..\build\Moq.props" />
   <Import Project="..\..\build\Rx.props" />
   <Import Project="..\..\build\XUnit.props" />
   <Import Project="Avalonia.RenderTests.projitems" Label="Shared" />
   <Import Project="..\..\build\Magick.NET-Q16-AnyCPU.props" />
   <Import Project="..\..\build\SkiaSharp.props" />
-    <Target Name="FixSkiaSharp" AfterTargets="Build">
-      <Copy SourceFiles="$(OutputPath)\x86\libSkiaSharp.dll" DestinationFolder="$(OutputPath)" Condition="'$(TargetFramework)' == 'net461'" />
-  </Target>
+  
+  <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
 </Project>