diff --git a/spec/services/order_invoice_comparator_spec.rb b/spec/services/order_invoice_comparator_spec.rb
index 22dd5cdb3f..86b26dc91f 100644
--- a/spec/services/order_invoice_comparator_spec.rb
+++ b/spec/services/order_invoice_comparator_spec.rb
@@ -57,6 +57,11 @@ describe OrderInvoiceComparator do
         expect(subject).to be true
       end
 
+      it "returns false if a non-relevant attribute changes" do
+        order.update!(special_instructions: "A very special insctruction.")
+        expect(subject).to be false
+      end
+
       it "returns false if a non-relevant attribute changes" do
         order.update!(note: "THIS IS A NEW NOTE")
         expect(subject).to be false