diff --git a/erpnext/selling/doctype/sales_order/test_sales_order.py b/erpnext/selling/doctype/sales_order/test_sales_order.py
index 735b071..5aef096 100644
--- a/erpnext/selling/doctype/sales_order/test_sales_order.py
+++ b/erpnext/selling/doctype/sales_order/test_sales_order.py
@@ -89,6 +89,8 @@
 		self.assertEqual(len(si.get("items")), 1)
 
 		si.insert()
+		si.set('taxes', [])
+		si.save()
 
 		self.assertEqual(si.payment_schedule[0].payment_amount, 500.0)
 		self.assertEqual(si.payment_schedule[0].due_date, so.transaction_date)