diff --git a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
index 322fc9f..e43ea6e 100644
--- a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
@@ -1747,6 +1747,7 @@
 			paid_to="Creditors - _TC",
 			paid_amount=500,
 		)
+		pe.save()  # save trigger is needed for set_liability_account() to be executed
 		pe.submit()
 
 		pi = make_purchase_invoice(