fix: Test Fee Validity
diff --git a/erpnext/healthcare/doctype/fee_validity/test_fee_validity.py b/erpnext/healthcare/doctype/fee_validity/test_fee_validity.py
index b8305d7..26b1450 100644
--- a/erpnext/healthcare/doctype/fee_validity/test_fee_validity.py
+++ b/erpnext/healthcare/doctype/fee_validity/test_fee_validity.py
@@ -68,6 +68,7 @@
 	appointment.department = department
 	appointment.appointment_date = appointment_date
 	appointment.company = "_Test Company"
+	appointment.duration = 15
 	appointment.save(ignore_permissions=True)
 	return appointment