<PackageReference Include="NUnit" Version="4.2.2" />

NUnit.Framework.ExplicitAttribute

Marks an assembly, test fixture or test method such that it will only run if explicitly executed from the GUI, command line or included within a test filter. The test will not be run simply because an enclosing suite is run.
namespace NUnit.Framework { public class ExplicitAttribute : NUnitAttribute, IApplyToTest { public ExplicitAttribute(); public ExplicitAttribute(string reason); public void ApplyToTest(Test test); } }