Roman doctors misstate the Reformed doctrine
Thesis XXVII. This account of the orthodox view needs careful attention because of the doctors of the Roman Church, who on this question, as on many others, either fail to understand the teaching of the Reformed school or twist it deliberately. They ascribe to Protestant theologians a flat denial that Christ's faithful can keep God's commandments and fulfil the law in such a way that any of their works can be called righteous.
They even claim that Protestants teach that the law is simply impossible for someone justified by Christ's grace, so that he can do no good works at all and has no true actual righteousness. This can be seen in Bellarmine, De justificatione, book 4, chapter 10, and in Becanus's Summa of scholastic theology, volume 2, tractate 4, chapter 4, which is titled 'On the merit of good works according to the opinion of the Calvinists'.
Latin
XXVII. Atque haec Sententiae Orthodoxae explicatio diligenter observanda est propter doctores Ecclesiae Romanae, qui in hac quaestione, ut in multis aliis, Scholae Reformatae doctrinam, aut non intelligunt, aut studio pervertunt. Siquidem Theologis Protestantibus tribuunt quod simpliciter negent Christi fideles Dei mandata servare posse, & legem ita implere, ut quaedam eorum opera justa appellari possint. Imo quod doceant legem plane impossibilem esse homini etiam per Christi gratiam justificato: adeo ut non possit ulla bona opera facere, nec in eo sit ulla vera actualis justitia. Sicut videre est apud Bell. de Justif. lib. 4. cap. 10. & apud Becanum in summa Theologiae Scolasticae, tom. 2. tract. 4. cap. 4. cujus titulus est, De merito bonorum operum ex sententia Calvinistarum.