fluent validation validator ignoring custom rules created in domain layer

i have a generated domain model using LLBLGEN, and im validating those validation rules which are created at domain layer using the fluentvalidation.TestHelper features.

an example of my validation looks like this:

public partial class MyClassValidator : AbstractValidator< MyClass >    

{

public MyClassValidator()
{
RuleFor(x => x.MyObjMoneyValue)
.NotEmpty() 
.WithName("MyObjMoneyValue")
.WithState(x => NewFluentCustomState(x)); 

CustomRules();
} 
}

so i have a custom set of rules which arent generated by LLBLGEN which is a partial class to the generated rules which allows me to write some custom rules that arent based on the database (i.e. not null).

public partial class MyClassValidator 
{
    private void CustomRules()
    {
        RuleFor(q => q.MyObjMoneyValue)
            .GreaterThan(0)
            .WithMessage("Value must be greater than 0")
            .WithState(NewFluentCustomState);

i have a test to test this case:

_validator.ShouldHaveValidationErrorFor(q => q.MyObjMoneyValue, 0);

However, this fails to test the custom rules.. any idea how how i can test the custom rules?

thanks

You can use Custom(x => x.) for your custom validation no need for another methods