To use Specify with Fixie, you simply have to provide a Fixie convention class. The convention that we need to apply is that the class implements IScenario and the test method is named Specify.

public class FixieSpecifyConvention : Convention
{
    public FixieSpecifyConvention()
    {
        Classes
            .Where(type => type.IsScenario());

        Methods
            .Where(method => method.Name == "Specify");
    }
}