diff --git a/erpnext/accounts/doctype/pos_invoice/test_pos_invoice.py b/erpnext/accounts/doctype/pos_invoice/test_pos_invoice.py
index a76ae12..e06f7aa 100644
--- a/erpnext/accounts/doctype/pos_invoice/test_pos_invoice.py
+++ b/erpnext/accounts/doctype/pos_invoice/test_pos_invoice.py
@@ -340,6 +340,7 @@
 			item=se.get("items")[0].item_code, rate=1000, do_not_save=1)
 
 		si.get("items")[0].serial_no = serial_nos[0]
+		si.update_stock = 1
 		si.insert()
 		si.submit()
 
diff --git a/erpnext/accounts/doctype/pos_invoice_merge_log/test_pos_invoice_merge_log.py b/erpnext/accounts/doctype/pos_invoice_merge_log/test_pos_invoice_merge_log.py
index 655d726..fe57ce2 100644
--- a/erpnext/accounts/doctype/pos_invoice_merge_log/test_pos_invoice_merge_log.py
+++ b/erpnext/accounts/doctype/pos_invoice_merge_log/test_pos_invoice_merge_log.py
@@ -435,7 +435,7 @@
 			pos_inv2.append('payments', {
 				'mode_of_payment': 'Cash', 'account': 'Cash - _TC', 'amount': 100
 			})
-			pos_inv.submit()
+			pos_inv2.submit()
 
 			consolidate_pos_invoices()