diff --git a/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py b/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py
index 9ec69c3..3fa34e2 100644
--- a/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py
+++ b/erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py
@@ -256,6 +256,7 @@
 		make_pricing_rule(selling=1, margin_type="Percentage", margin_rate_or_amount=10)
 		si = create_sales_invoice(do_not_save=True)
 		si.items[0].price_list_rate = 1000
+		si.payment_schedule = []
 		si.insert(ignore_permissions=True)
 
 		item = si.items[0]
@@ -264,6 +265,7 @@
 
 		# With discount
 		item.discount_percentage = 10
+		si.payment_schedule = []
 		si.save()
 		item = si.items[0]
 		self.assertEquals(item.rate, 990)
diff --git a/erpnext/selling/doctype/sales_order/test_sales_order.py b/erpnext/selling/doctype/sales_order/test_sales_order.py
index 972453c..8f3b14a 100644
--- a/erpnext/selling/doctype/sales_order/test_sales_order.py
+++ b/erpnext/selling/doctype/sales_order/test_sales_order.py
@@ -526,6 +526,8 @@
 
 		self.assertEquals(new_so.get("items")[0].rate, flt((price_list_rate*25)/100 + price_list_rate))
 		new_so.items[0].margin_rate_or_amount = 25
+		new_so.payment_schedule = []
+		new_so.save()
 		new_so.submit()
 
 		self.assertEquals(new_so.get("items")[0].rate, flt((price_list_rate*25)/100 + price_list_rate))
@@ -564,6 +566,10 @@
 		so.insert()
 		if not args.do_not_submit:
 			so.submit()
+		else:
+			so.payment_schedule = []
+	else:
+		so.payment_schedule = []
 
 	return so