diff --git a/app/services/order_tax_adjustments_fetcher.rb b/app/services/order_tax_adjustments_fetcher.rb
index 085119172c..3eee488535 100644
--- a/app/services/order_tax_adjustments_fetcher.rb
+++ b/app/services/order_tax_adjustments_fetcher.rb
@@ -32,7 +32,7 @@ class OrderTaxAdjustmentsFetcher
   end
 
   def line_item_adjustments
-    table[:adjustable_id].eq(order.line_item_ids.join(','))
+    table[:adjustable_id].eq_any(order.line_item_ids)
       .and(table[:adjustable_type].eq('Spree::LineItem'))
   end
 
diff --git a/spec/services/order_tax_adjustments_fetcher_spec.rb b/spec/services/order_tax_adjustments_fetcher_spec.rb
index 8bbe7d4220..4319f17b4d 100644
--- a/spec/services/order_tax_adjustments_fetcher_spec.rb
+++ b/spec/services/order_tax_adjustments_fetcher_spec.rb
@@ -90,8 +90,7 @@ describe OrderTaxAdjustmentsFetcher do
       expect(subject.size).to eq(4)
     end
 
-    xit "contains tax on line_item" do
-      # This should be the sum of tax on all line items, but only returns tax for one.
+    it "contains tax on all line_items" do
       expect(subject[tax_rate10]).to eq(8.0)
     end