diff --git a/script/test/TestFourcvTiny.py b/script/test/TestFourcvTiny.py
index 7189ca9..b70ac74 100644
--- a/script/test/TestFourcvTiny.py
+++ b/script/test/TestFourcvTiny.py
@@ -9,6 +9,7 @@ class FourCircleX04SA_V(YouGeometry):
     """
     def __init__(self):
         YouGeometry.__init__(self, 'fourcv', {'phi': 0, 'chi': 0})
+        diffcalc.hkl.you.constraints.NUNAME = fourcv.motors[2].name
 
     def physical_angles_to_internal_position(self, physical_angle_tuple):
         # mu, delta, nu, eta, chi, phi