diff --git a/spec/factories.rb b/spec/factories.rb
index c405e09c9a..36dee4dd26 100644
--- a/spec/factories.rb
+++ b/spec/factories.rb
@@ -280,6 +280,16 @@ FactoryBot.define do
     after(:create) { |c| c.set_preference(:per_kg, 0.5); c.save! }
   end
 
+  factory :shipping_method_with_flat_rate, parent: :shipping_method do
+    calculator { Spree::Calculator::FlatRate.new(preferred_amount: 50.0) }
+  end
+
+  factory :shipment_with_flat_rate, parent: :shipment do
+    after(:create) do |shipment|
+      shipment.add_shipping_method(create(:shipping_method_with_flat_rate), true)
+    end
+  end
+
   factory :order_with_totals_and_distribution, :parent => :order do #possibly called :order_with_line_items in newer Spree
     distributor { create(:distributor_enterprise) }
     order_cycle { create(:simple_order_cycle) }
diff --git a/spec/models/spree/adjustment_spec.rb b/spec/models/spree/adjustment_spec.rb
index cc1022e34a..e64b0e14ba 100644
--- a/spec/models/spree/adjustment_spec.rb
+++ b/spec/models/spree/adjustment_spec.rb
@@ -59,10 +59,10 @@ module Spree
       end
 
       describe "Shipment adjustments" do
-        let!(:order)          { create(:order, distributor: hub, shipping_method: shipping_method) }
+        let!(:shipment)       { create(:shipment_with_flat_rate) }
+        let!(:order)          { create(:order, distributor: hub, shipments: [shipment]) }
         let(:hub)             { create(:distributor_enterprise, charges_sales_tax: true) }
         let!(:line_item)      { create(:line_item, order: order) }
-        let(:shipping_method) { create(:shipping_method, calculator: Calculator::FlatRate.new(preferred_amount: 50.0)) }
         let(:adjustment)      { order.adjustments(:reload).shipping.first }
 
         it "has a shipping charge of $50" do