dotnet test with .NET 8 SDK installed

[csim]

• NUnit 3.13.1, NUnit3TestAdapter 4.3.0
• Visual Studio 2022 enterprise edition 17.8.1

After installing .NET 8, running "dotnet test" throws the error:

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
NUnit Adapter 4.3.0.0: Test execution started
Running selected tests in C:\_work\1\s\bin\published-tests\Release\NetDesktop\net45\Microsoft.ProgramSynthesis.Transformation.Table.Tests.dll
Exception System.TypeInitializationException,    Exception thrown executing tests in C:\_work\1\s\bin\published-tests\Release\NetDesktop\net45\Microsoft.ProgramSynthesis.Transformation.Table.Tests.dll
The type initializer for 'NUnit.Engine.Services.RuntimeFrameworkService' threw an exception.
   at NUnit.Engine.Services.RuntimeFrameworkService.ApplyImageData(TestPackage package)
   at NUnit.Engine.Services.RuntimeFrameworkService.SelectRuntimeFramework(TestPackage package)
   at NUnit.Engine.Runners.MasterTestRunner.GetEngineRunner()
   at NUnit.Engine.Runners.MasterTestRunner.Explore(TestFilter filter)
   at NUnit.VisualStudio.TestAdapter.NUnitEngine.NUnitEngineAdapter.Explore(TestFilter filter) in D:\repos\NUnit\nunit3-vs-adapter\src\NUnitTestAdapter\NUnitEngine\NUnitEngineAdapter.cs:line 88
   at NUnit.VisualStudio.TestAdapter.NUnit3TestExecutor.RunAssembly(String assemblyPath, IGrouping`2 testCases, TestFilter filter) in D:\repos\NUnit\nunit3-vs-adapter\src\NUnitTestAdapter\NUnit3TestExecutor.cs:line 275
InnerException: System.ArgumentException: Unknown framework version 8.0
Parameter name: version
   at NUnit.Engine.RuntimeFramework.GetClrVersionForFramework(Version frameworkVersion)
   at NUnit.Engine.RuntimeFramework..ctor(RuntimeType runtime, Version version, String profile)
   at NUnit.Engine.RuntimeFramework.GetNetCoreRuntimesFromDirectoryNames(IEnumerable`1 dirNames)
   at NUnit.Engine.RuntimeFramework.FindDotNetCoreFrameworks()
   at NUnit.Engine.RuntimeFramework.get_AvailableFrameworks()
   at NUnit.Engine.Services.RuntimeFrameworkService..cctor()
NUnit Adapter 4.3.0.0: Test execution complete
No test matches the given testcase filter `TestCategory = LearningPerformance & TestCategory != ExcludeWindows & TestCategory != LLM & TestCategory != Experiment` in C:\_work\1\s\bin\published-tests\Release\NetDesktop\net45\Microsoft.ProgramSynthesis.Transformation.Table.Tests.dll

Upgrading NUnit3TestAdaptor is not possible because the test project targets net45 which is not supported by the NUnit3TestAdapter package starting in version 4.3.1.

Unless I've missed something, it appears as though it is not possible to use "dotnet test" for a test project targeting net45 on a machine that has .NET 8 installed with NUnit3TestAdapter 4.3.0

I can understand deprecating old framework versions, but could we get a 4.3 patch to enable "dotnet test" for machines that have .NET 8 installed?