diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index eff8b6c8169..02fae0cd580 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -76,6 +76,7 @@ class TestSalesInvoice(IntegrationTestCase):
 
 	@classmethod
 	def setUpClass(self):
+		super().setUpClass()
 		unlink_payment_on_cancel_of_invoice()
 
 	@classmethod