diff --git a/test/Dummy_test.cc b/test/Dummy_test.cc
index 41444ff..abba183 100644
--- a/test/Dummy_test.cc
+++ b/test/Dummy_test.cc
@@ -17,8 +17,8 @@ TEST(Dummy, Foo) {
   Perception *perception = new Perception(sensors);
 
   DifferentialDrive *propulsion =
-      new DifferentialDrive(Placement(&motorLeft, Vector3::Left),
-                            Placement(&motorRight, Vector3::Right));
+      new DifferentialDrive(Placement(&motorLeft, Vector3(-1, 0, 0)),
+                            Placement(&motorRight, Vector3(1, 0, 0)));
 
   Roboid *roboid = new Roboid(perception, propulsion);
 }