test: ensure test case sets Selling Settings
diff --git a/erpnext/selling/doctype/quotation/test_quotation.py b/erpnext/selling/doctype/quotation/test_quotation.py
index 5cd6545..b3c21c4 100644
--- a/erpnext/selling/doctype/quotation/test_quotation.py
+++ b/erpnext/selling/doctype/quotation/test_quotation.py
@@ -33,6 +33,11 @@
 	def test_maintain_rate_in_sales_cycle_is_enforced(self):
 		from erpnext.selling.doctype.quotation.quotation import make_sales_order
 
+		maintain_rate = frappe.db.get_value(
+			"Selling Settings", "Selling Settings", "maintain_same_sales_rate"
+		)
+		frappe.db.set_value("Selling Settings", "Selling Settings", "maintain_same_sales_rate", 1)
+
 		quotation = frappe.copy_doc(test_records[0])
 		quotation.transaction_date = nowdate()
 		quotation.valid_till = add_months(quotation.transaction_date, 1)
@@ -43,6 +48,10 @@
 		sales_order.items[0].rate = 1
 		self.assertRaises(frappe.ValidationError, sales_order.save)
 
+		frappe.db.set_value(
+			"Selling Settings", "Selling Settings", "maintain_same_sales_rate", maintain_rate
+		)
+
 	def test_make_sales_order_with_different_currency(self):
 		from erpnext.selling.doctype.quotation.quotation import make_sales_order