I was writing of Cardinal Newman, not Vincent of Lerins.
Newman was a liberal. He was vehemently opposed by Catholics in his day (American convert Orestes Brownson authored a contemporary expose on him).
Where exactly in Cardinal Newman's writings does he offer opinions regarding doctrine which fail St. Vincent's threefold test of Catholic orthodoxy?
"As developments which are preceded by definite indications have a fair presumption in their favour, so those which do but contradict and reverse the course of doctrine which has been developed before them, and out of which they spring, are certainly corrupt; for a corruption is a development in that very stage in which it ceases to illustrate, and begins to disturb, the acquisitions gained in its previous history.
...A true development, then, may be described as one which is conservative of the course of antecedent developments being really those antecedents and something besides them: it is an addition which illustrates, not obscures, corroborates, not corrects, the body of thought from which it proceeds; and this is its characteristic as contrasted with a corruption."
From "An Essay on the Development of Christian Doctrine" - John Henry Newman