This is part of the Fake.DotNet.Testing.NUnit module.

NUnit3DomainModel

The --domain option controls of the creation of AppDomains for running tests. See NUnit-Console Command Line Options

Union Cases

Union CaseDescription
DefaultDomainModel
Signature:

The default is to use multiple domains if multiple assemblies are listed on the command line. Otherwise a single domain is used.
MultipleDomainModel
Signature:

A separate test domain is created for each assembly
NoDomainModel
Signature:

No domain is created - the tests are run in the primary domain. This normally requires copying the NUnit assemblies into the same directory as your tests.
SingleDomainModel
Signature:

A test domain is created - this is how NUnit worked prior to version 2.4

Instance members

Instance memberDescription
x.ParamString
Signature: string