diff --git a/spec/factories/adjustment_factory.rb b/spec/factories/adjustment_factory.rb
index 96360610b3..4b9fa8748f 100644
--- a/spec/factories/adjustment_factory.rb
+++ b/spec/factories/adjustment_factory.rb
@@ -5,7 +5,6 @@ FactoryBot.define do
     association(:adjustable, factory: :order)
     amount { 100.0 }
     label { 'Shipping' }
-    association(:source, factory: :shipment)
     eligible { true }
   end
 end
diff --git a/spec/models/spree/order/adjustments_spec.rb b/spec/models/spree/order/adjustments_spec.rb
index 639e058f87..4c2daf5ade 100644
--- a/spec/models/spree/order/adjustments_spec.rb
+++ b/spec/models/spree/order/adjustments_spec.rb
@@ -37,13 +37,11 @@ describe Spree::Order do
       before do
         @adj1 = line_item1.adjustments.create(
           amount: 2,
-          source: line_item1,
           label: "VAT 5%"
         )
 
         @adj2 = line_item1.adjustments.create(
           amount: 5,
-          source: line_item1,
           label: "VAT 10%"
         )
       end
@@ -58,13 +56,11 @@ describe Spree::Order do
       before do
         @adj1 = line_item1.adjustments.create(
           amount: 2,
-          source: line_item1,
           label: "VAT 5%"
         )
 
         @adj2 = line_item2.adjustments.create(
           amount: 5,
-          source: line_item2,
           label: "VAT 10%"
         )
       end