One would not expect a Reformed theologian [as opposed to a Lutheran one] to teach that good works are detrimental to salvation.  This position was advocated by Nicholas von Amsdorf, although it was rejected by the Formula of Concord.  But where Amsdorf’s position was rejected, so was George Major’s.  He held: “Good works are necessary to salvation,” “It is impossible to be saved without good works,” and “No one will be saved without good works.” In rejecting Major, the Lutheran theologians were also rejecting the position held by Zanchius, Piscator, and Turretin.

From Peter Lillback’s Binding of God, The: Calvin’s Role in the Development of Covenant Theology (Texts and Studies in Reformation and Post-Reformation Thought); p. 207

For Presbyterian doctrine on this topic, see my The Necessity of New Obedience.