diff --git a/product/ERP5/tests/testAmount.py b/product/ERP5/tests/testAmount.py
index 43d5d8fb76bdb6b79eed6a4680df73c2ff972e9c..ac3c9d2099aa1b155482d2130c114a389c63540e 100644
--- a/product/ERP5/tests/testAmount.py
+++ b/product/ERP5/tests/testAmount.py
@@ -256,7 +256,7 @@ class TestMovement(ERP5TypeTestCase):
     mvt = self._makeOne('mvt')
     mvt.setQuantity(10)
     self.assertEquals(10, mvt.getQuantity())
-    self.assertEquals(None, mvt.getTotalPrice())
+    self.assertEquals(0, mvt.getTotalPrice())
     mvt.edit(quantity=20)
     self.assertEquals(20, mvt.getQuantity())