To ascertain the existence of an employer-employee relationship, jurisprudence has invariably adhered to the four-fold test, to wit: (1) the selection and engagement of the employee; (2) the payment of wages; (3) the power of dismissal; and (4) the power to control the employee's conduct, or the so-called ''control test.'' (Atienza vs. Saluta G.R. No. 233413 June 17, 2019)