diff --git a/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp b/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp
index 1107d1e30..5758509eb 100644
--- a/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp
+++ b/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp
@@ -131,14 +131,14 @@ TEST(ExpressionFactor, Unary) {
 // Unary(Leaf)) and Unary(Unary(Leaf)))
 // wide version (not handled in fixed-size pipeline)
 typedef Eigen::Matrix<double,9,3> Matrix93;
-Vector9 wide(const Point3& p, boost::optional<Matrix93&> H) {
+Vector9 wide(const Point3& p, OptionalJacobian<9,3> H) {
   Vector9 v;
   v << p.vector(), p.vector(), p.vector();
   if (H) *H << eye(3), eye(3), eye(3);
   return v;
 }
 typedef Eigen::Matrix<double,9,9> Matrix9;
-Vector9 id9(const Vector9& v, boost::optional<Matrix9&> H) {
+Vector9 id9(const Vector9& v, OptionalJacobian<9,9> H) {
   if (H) *H = Matrix9::Identity();
   return v;
 }