ADO Pipeline failing with .Net 6.0 SDK incompatible with ATC.Test error

[JKrag]

I am using atc-coding-rules on a project. It builds fine locally in both dotnet build and in VS2022.
In my pipeline however, it fails with the error below:

Already discussed with @davidkallesen over teams.

Error in build pipeline:

NU1202: Package Atc.Test 1.0.45 is not compatible with net60 (.NETFramework,Version=v6.0). Package Atc.Test 1.0.45 supports: netstandard2.1 (.NETStandard,Version=v2.1))

Directorty.build.props from test project

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <!--
    Add any shared properties you want for the projects under this directory that need to be set before the auto imported Directory.Build.props
  -->
  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory).., Directory.Build.props))\Directory.Build.props" />

  <PropertyGroup Label="Compile settings">
    <Nullable>annotations</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Atc.Test" Version="1.0.45" />
    <PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.15" PrivateAssets="All" />
  </ItemGroup>

  <ItemGroup>
    <Using Include="Atc.Test" />
    <Using Include="AutoFixture" />
    <Using Include="AutoFixture.Xunit2" />
    <Using Include="FluentAssertions" />
    <Using Include="NSubstitute" />
    <Using Include="Xunit" />
  </ItemGroup>

</Project>

Test project .csproj file:

    <TargetFramework>net6.0</TargetFramework>