diff --git a/script/test/InterlockMotorGroup.py b/script/test/InterlockMotorGroup.py
index 82ebe74..308d32e 100644
--- a/script/test/InterlockMotorGroup.py
+++ b/script/test/InterlockMotorGroup.py
@@ -25,7 +25,7 @@ class InterlockFourcv (Interlock):
         Interlock.__init__(self, (fourcv, mu, delta, gamma, eta)) 
 
     def check(self, (p, m, d, g, e)): 
-        if fourcv.isSimultaneousMove():
+        if fourcv.isStartingSimultaneousMove():
             m, d, g, e = p
         if d>m:
             return False