diff --git a/app/models/spree/stock_item_decorator.rb b/app/models/spree/stock_item_decorator.rb
new file mode 100644
index 0000000000..e115225c4f
--- /dev/null
+++ b/app/models/spree/stock_item_decorator.rb
@@ -0,0 +1,7 @@
+Spree::StockItem.class_eval do
+  after_save :refresh_products_cache
+
+  def refresh_products_cache
+    OpenFoodNetwork::ProductsCache.variant_changed(variant)
+  end
+end
diff --git a/lib/open_food_network/integrity_checker.rb b/spec/lib/open_food_network/integrity_checker_spec.rb
similarity index 100%
rename from lib/open_food_network/integrity_checker.rb
rename to spec/lib/open_food_network/integrity_checker_spec.rb
diff --git a/spec/models/spree/stock_item_spec.rb b/spec/models/spree/stock_item_spec.rb
new file mode 100644
index 0000000000..f934084784
--- /dev/null
+++ b/spec/models/spree/stock_item_spec.rb
@@ -0,0 +1,10 @@
+require 'spec_helper'
+
+describe Spree::StockItem do
+  let!(:variant) { create(:variant) }
+
+  it 'refreshes the products cache on save' do
+    expect(OpenFoodNetwork::ProductsCache).to receive(:variant_changed).with(variant)
+    variant.on_hand = -2
+  end
+end
diff --git a/spec/models/spree/variant_spec.rb b/spec/models/spree/variant_spec.rb
index b5643e0109..1cf9228b52 100644
--- a/spec/models/spree/variant_spec.rb
+++ b/spec/models/spree/variant_spec.rb
@@ -166,7 +166,8 @@ module Spree
       let(:variant) { create(:variant) }
 
       it "refreshes the products cache on save" do
-        expect(OpenFoodNetwork::ProductsCache).to receive(:variant_changed).with(variant)
+        # When creating the variant both the Variant and StockItem callbacks get executed
+        expect(OpenFoodNetwork::ProductsCache).to receive(:variant_changed).with(variant).twice
         variant.sku = 'abc123'
         variant.save
       end
@@ -182,7 +183,8 @@ module Spree
 
         it "refreshes the products cache for the entire product on save" do
           expect(OpenFoodNetwork::ProductsCache).to receive(:product_changed).with(product)
-          expect(OpenFoodNetwork::ProductsCache).to receive(:variant_changed).never
+          # The StockItem callback is still executed
+          expect(OpenFoodNetwork::ProductsCache).to receive(:variant_changed).once
           master.sku = 'abc123'
           master.save
         end