diff --git a/gtsam/sfm/tests/testMFAS.cpp b/gtsam/sfm/tests/testMFAS.cpp
index 362027d5dc..a1f6dfa5fc 100644
--- a/gtsam/sfm/tests/testMFAS.cpp
+++ b/gtsam/sfm/tests/testMFAS.cpp
@@ -25,7 +25,7 @@ using namespace gtsam;
 vector<MFAS::KeyPair> edges = {make_pair(3, 2), make_pair(0, 1), make_pair(3, 1),
                          make_pair(1, 2), make_pair(0, 2), make_pair(3, 0)};
 // nodes in the graph
-vector<Key> nodes = {Key(0), Key(1), Key(2), Key(3)};
+KeyVector nodes = {Key(0), Key(1), Key(2), Key(3)};
 // weights from projecting in direction-1 (bad direction, outlier accepted)
 vector<double> weights1 = {2, 1.5, 0.5, 0.25, 1, 0.75};
 // weights from projecting in direction-2 (good direction, outlier rejected)
@@ -47,10 +47,10 @@ map<MFAS::KeyPair, double> getEdgeWeights(const vector<MFAS::KeyPair> &edges,
 TEST(MFAS, OrderingWeights2) {
   MFAS mfas_obj(getEdgeWeights(edges, weights2));
 
-  vector<Key> ordered_nodes = mfas_obj.computeOrdering();
+  KeyVector ordered_nodes = mfas_obj.computeOrdering();
 
   // ground truth (expected) ordering in this example
-  vector<Key> gt_ordered_nodes = {0, 1, 3, 2};
+  KeyVector gt_ordered_nodes = {0, 1, 3, 2};
 
   // check if the expected ordering is obtained
   for (size_t i = 0; i < ordered_nodes.size(); i++) {
@@ -77,10 +77,10 @@ TEST(MFAS, OrderingWeights2) {
 TEST(MFAS, OrderingWeights1) {
   MFAS mfas_obj(getEdgeWeights(edges, weights1));
 
-  vector<Key> ordered_nodes = mfas_obj.computeOrdering();
+  KeyVector ordered_nodes = mfas_obj.computeOrdering();
 
   // "ground truth" expected ordering in this example
-  vector<Key> gt_ordered_nodes = {3, 0, 1, 2};
+  KeyVector gt_ordered_nodes = {3, 0, 1, 2};
 
   // check if the expected ordering is obtained
   for (size_t i = 0; i < ordered_nodes.size(); i++) {