diff --git a/spec/support/missing_factory_helper.rb b/spec/support/missing_factory_helper.rb
index 97f196272b7..5c6385d03d3 100644
--- a/spec/support/missing_factory_helper.rb
+++ b/spec/support/missing_factory_helper.rb
@@ -3,11 +3,11 @@ module Spec
   module Support
     module MissingFactoryHelper
       def build(factory, *args, &block)
-        registered_factory_symbols.include?(factory) ? super : class_from_symbol(factory).new(*args)
+        factory_exists?(factory) ? super : class_from_symbol(factory).new(*args)
       end
 
       def create(factory, *args, &block)
-        registered_factory_symbols.include?(factory) ? super : class_from_symbol(factory).create!(*args)
+        factory_exists?(factory) ? super : class_from_symbol(factory).create!(*args)
       end
 
       private
@@ -16,6 +16,10 @@ def class_from_symbol(symbol)
         symbol.to_s.classify.constantize
       end
 
+      def factory_exists?(factory)
+        registered_factory_symbols.include?(factory.to_sym)
+      end
+
       def registered_factory_symbols
         @registered_factory_symbols ||= begin
           require 'set'