diff --git a/org.idempiere.test/src/org/idempiere/test/model/PurchaseOrderTest.java b/org.idempiere.test/src/org/idempiere/test/model/PurchaseOrderTest.java
index 3f66f52acb..d1dbfa6cdf 100644
--- a/org.idempiere.test/src/org/idempiere/test/model/PurchaseOrderTest.java
+++ b/org.idempiere.test/src/org/idempiere/test/model/PurchaseOrderTest.java
@@ -290,10 +290,11 @@ public class PurchaseOrderTest extends AbstractTestCase {
 		order.load(trxName);
 		assertEquals(DocAction.STATUS_Completed, order.getDocStatus());
 		line1.load(trxName);
-		assertEquals(0, line1.getQtyReserved().compareTo(MINUS_THREE));
+		// IDEMPIERE-5039 - when reservations go negative they are changed to zero
+		assertEquals(0, line1.getQtyReserved().compareTo(Env.ZERO));
 
 		newQtyOrdered = getQtyOrdered(ctx, PRODUCT_MULCH, trxName);
-		assertEquals(0, qtyOrderedOriginal.add(MINUS_THREE).compareTo(newQtyOrdered));
+		assertEquals(0, qtyOrderedOriginal.compareTo(newQtyOrdered));
 
 		// create a new material receipt for the -3 reversed
 		MInOut receipt2 = new MInOut(order, DOCTYPE_RECEIPT, order.getDateOrdered());