diff --git a/app/models/site.rb b/app/models/site.rb
index 8b6df669974..f04b25bd766 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -5,7 +5,11 @@ class Site
   include ActiveModel::Serialization
 
   cattr_accessor :preloaded_category_custom_fields
-  self.preloaded_category_custom_fields = Set.new
+
+  def self.reset_preloaded_category_custom_fields
+    self.preloaded_category_custom_fields = Set.new
+  end
+  reset_preloaded_category_custom_fields
 
   ##
   # Sometimes plugins need to have additional data or options available
diff --git a/spec/models/site_spec.rb b/spec/models/site_spec.rb
index 213fa774cd6..1cfeac59dc8 100644
--- a/spec/models/site_spec.rb
+++ b/spec/models/site_spec.rb
@@ -133,7 +133,7 @@ describe Site do
 
       expect(categories.last[:custom_fields]["enable_marketplace"]).to eq('f')
     ensure
-      Site.preloaded_category_custom_fields.clear
+      Site.reset_preloaded_category_custom_fields
     end
 
     it 'sets the can_edit field for categories correctly' do
diff --git a/spec/requests/api/site_spec.rb b/spec/requests/api/site_spec.rb
index 9d026b5dfbb..ec513be52d9 100644
--- a/spec/requests/api/site_spec.rb
+++ b/spec/requests/api/site_spec.rb
@@ -34,7 +34,7 @@ describe 'site' do
             let(:expected_request_schema) { expected_request_schema }
           end
         ensure
-          Site.preloaded_category_custom_fields = Set.new
+          Site.reset_preloaded_category_custom_fields
         end
       end
     end
diff --git a/spec/serializers/site_serializer_spec.rb b/spec/serializers/site_serializer_spec.rb
index 6ee0d5968ec..6db717a38eb 100644
--- a/spec/serializers/site_serializer_spec.rb
+++ b/spec/serializers/site_serializer_spec.rb
@@ -25,7 +25,7 @@ describe SiteSerializer do
 
     expect(c1[:custom_fields]["enable_marketplace"]).to eq("t")
   ensure
-    Site.preloaded_category_custom_fields.clear
+    Site.reset_preloaded_category_custom_fields
   end
 
   it "includes category tags" do