diff --git a/src/Microsoft.CodeAnalysis.Testing/Directory.Build.props b/src/Microsoft.CodeAnalysis.Testing/Directory.Build.props
index c65b92c6..c38e9bc7 100644
--- a/src/Microsoft.CodeAnalysis.Testing/Directory.Build.props
+++ b/src/Microsoft.CodeAnalysis.Testing/Directory.Build.props
@@ -84,7 +84,7 @@
 
   <!-- Needed to override the transitive 9.0.1 version brought in by the 16.1.1 Microsoft.NET.Test.Sdk -->
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="$(NewtonsoftJsonVersion)" />
+    <PackageReference Include="Newtonsoft.Json" Version="$(NewtonsoftJsonVersion)" ExcludeAssets="all" />
   </ItemGroup>
 
   <!-- Use a different versioning scheme for nuget packages -->
diff --git a/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.Analyzer.Testing/Microsoft.CodeAnalysis.Analyzer.Testing.csproj b/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.Analyzer.Testing/Microsoft.CodeAnalysis.Analyzer.Testing.csproj
index 85c072b9..e15d74db 100644
--- a/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.Analyzer.Testing/Microsoft.CodeAnalysis.Analyzer.Testing.csproj
+++ b/src/Microsoft.CodeAnalysis.Testing/Microsoft.CodeAnalysis.Analyzer.Testing/Microsoft.CodeAnalysis.Analyzer.Testing.csproj
@@ -31,7 +31,7 @@
     </When>
     <Otherwise>
       <PropertyGroup>
-        <NuGetApiVersion>5.6.0</NuGetApiVersion>
+        <NuGetApiVersion>6.3.0</NuGetApiVersion>
       </PropertyGroup>
     </Otherwise>
   </Choose>
diff --git a/tests/Microsoft.CodeAnalysis.Testing/Directory.Build.props b/tests/Microsoft.CodeAnalysis.Testing/Directory.Build.props
index 4646f35c..08cfb6c8 100644
--- a/tests/Microsoft.CodeAnalysis.Testing/Directory.Build.props
+++ b/tests/Microsoft.CodeAnalysis.Testing/Directory.Build.props
@@ -21,7 +21,7 @@
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
 
   <PropertyGroup>
-    <TestTargetFrameworks>netcoreapp3.1;net472;net46</TestTargetFrameworks>
+    <TestTargetFrameworks>netcoreapp3.1;net472</TestTargetFrameworks>
     <SourceGeneratorTestTargetFrameworks>netcoreapp3.1;net472</SourceGeneratorTestTargetFrameworks>
 
     <!-- Workaround dependencies that do not yet support netcoreapp3.1 https://github.com/dotnet/roslyn/issues/45114 -->