diff --git a/erpnext/projects/doctype/timesheet/test_timesheet.py b/erpnext/projects/doctype/timesheet/test_timesheet.py
index cf95bd63680..311fe3da140 100644
--- a/erpnext/projects/doctype/timesheet/test_timesheet.py
+++ b/erpnext/projects/doctype/timesheet/test_timesheet.py
@@ -53,6 +53,7 @@ class TestTimesheet(IntegrationTestCase):
 		self.assertEqual(item.qty, 2.00)
 		self.assertEqual(item.rate, 50.00)
 
+	@IntegrationTestCase.change_settings("Projects Settings", {"fetch_timesheet_in_sales_invoice": 1})
 	def test_timesheet_billing_based_on_project(self):
 		emp = make_employee("test_employee_6@salary.com")
 		project = frappe.get_value("Project", {"project_name": "_Test Project"})
@@ -62,7 +63,7 @@ class TestTimesheet(IntegrationTestCase):
 		)
 		sales_invoice = create_sales_invoice(do_not_save=True)
 		sales_invoice.project = project
-		sales_invoice._add_timesheet_data()
+		sales_invoice.add_timesheet_data()
 		sales_invoice.submit()
 
 		ts = frappe.get_doc("Timesheet", timesheet.name)