diff --git a/js-jasmine/src/shop.js b/js-jasmine/src/shop.js
index 6f3762b7..6a9317d1 100644
--- a/js-jasmine/src/shop.js
+++ b/js-jasmine/src/shop.js
@@ -33,9 +33,7 @@ class Shop {
         }
       }
     }
-    if (item.name != 'Sulfuras, Hand of Ragnaros') {
-      item.sellIn = item.sellIn - 1;
-    }
+    this._updateSellIn(item)
     if (item.sellIn < 0) {
       if (item.name != 'Aged Brie') {
         if (item.name != 'Backstage passes to a TAFKAL80ETC concert') {
@@ -54,6 +52,12 @@ class Shop {
       }
     }
   }
+
+  _updateSellIn(item) {
+    if (item.name != 'Sulfuras, Hand of Ragnaros') {
+      item.sellIn = item.sellIn - 1;
+    }
+  }
 }
 module.exports = {
   Shop