diff --git a/spec/services/order_invoice_comparator_spec.rb b/spec/services/order_invoice_comparator_spec.rb
index b6c6bd7276..3d904a0b22 100644
--- a/spec/services/order_invoice_comparator_spec.rb
+++ b/spec/services/order_invoice_comparator_spec.rb
@@ -4,7 +4,9 @@ require 'spec_helper'
 
 describe OrderInvoiceComparator do
   describe '#can_generate_new_invoice?' do
-    let!(:order) { create(:completed_order_with_fees) }
+    let!(:completed_order_with_fees) { create(:completed_order_with_fees) }
+    # this passes 'order' as argument to the invoice comparator
+    let(:order) { completed_order_with_fees }
     let!(:invoice_data_generator){ InvoiceDataGenerator.new(order) }
     let!(:invoice){
       create(:invoice,
@@ -35,20 +37,18 @@ describe OrderInvoiceComparator do
         let(:distributor) { create(:distributor_enterprise) }
         let!(:order_with_taxes) do
           create(:order_with_taxes, distributor: distributor, ship_address: create(:address),
-                                    product_price: 110, tax_rate_amount: 0.1, included_in_price: false,
+                                    product_price: 110, tax_rate_amount: 0.1,
+                                    included_in_price: false,
                                     tax_rate_name: "Tax 1").tap do |order|
                                       order.create_tax_charge!
                                       order.update_shipping_fees!
                                     end
         end
+        let!(:order) { order_with_taxes }
 
         it "returns returns true" do
-          expect(order_with_taxes.additional_tax_total).to eq 0.11e2
           Spree::TaxRate.first.update!(amount: 0.15)
           order_with_taxes.create_tax_charge! && order_with_taxes.save
-
-          expect(order_with_taxes.additional_tax_total).to eq 0.165e2
-
           expect(subject).to be true
         end
       end
@@ -64,26 +64,20 @@ describe OrderInvoiceComparator do
                                       order.update_shipping_fees!
                                     end
         end
+        let!(:order) { order_with_taxes }
 
         it "returns returns true" do
-          expect(order_with_taxes.included_tax_total).to eq 0.1e2
           Spree::TaxRate.first.update!(amount: 0.15)
           order_with_taxes.create_tax_charge! && order_with_taxes.save
-
-          expect(order_with_taxes.included_tax_total).to eq 0.1435e2
-
           expect(subject).to be true
         end
       end
 
       context "shipping method changes" do
         let(:shipping_method) { create(:shipping_method) }
-        let!(:order_ready_to_ship) {
-          create(:order_ready_to_ship)
-        }
+        let!(:order) { completed_order_with_fees }
         it "returns returns true" do
           Spree::ShippingRate.first.update(shipping_method_id: shipping_method.id)
-          order_ready_to_ship.update_shipping_fees! && order_ready_to_ship.save
           expect(subject).to be true
         end
       end