In Estorinho v Jokic a cafe knowingly hired a catholic chef who did not want to work on Sunday because of the Old Testament prohibition on working on the sabbath. After several years of this arrangement the cafe decided they wanted him to work on Sunday. The chef raised a grievance based on religious discrimination and in retaliation the cafe sacked him. The tribunal found that the dismissal was because the chef complained he was being discriminated against on grounds of religion and was unfair. The report doesn't indicate the compensation sum.
There was no doubt in this case that the religious beliefs were genuine. Future cases may though turn on whether an employee genuinely has a religious objection to sabbath working.