diff --git a/js-jest/src/gilded_rose.js b/js-jest/src/gilded_rose.js
index 83f2cf87..2f271971 100644
--- a/js-jest/src/gilded_rose.js
+++ b/js-jest/src/gilded_rose.js
@@ -9,15 +9,14 @@ class Item {
 class ItemUpdater {
   constructor(item) {
     this.item = item;
+    this.qualityChangeFactor = 1;
   }
 
   updateQuality() {
 
-    let qualityChangeFactor = 1;
-
     //Once the sell by date has passed, Quality degrades twice as fast
     if(this.item.sellIn < 0) {
-      qualityChangeFactor = 2;
+      this.qualityChangeFactor = 2;
     }
 
     //The Quality of an item is never more than 50
@@ -26,7 +25,7 @@ class ItemUpdater {
     }
 
     if (this.item.quality > 0 && this.item.quality < 50) {
-      this.item.quality = this.item.quality - qualityChangeFactor;
+      this.item.quality = this.item.quality - this.qualityChangeFactor;
     }
     return this.item;
   }
diff --git a/js-jest/src/item_updaters/aged_brie_updater.js b/js-jest/src/item_updaters/aged_brie_updater.js
index b96ca555..ec343d35 100644
--- a/js-jest/src/item_updaters/aged_brie_updater.js
+++ b/js-jest/src/item_updaters/aged_brie_updater.js
@@ -2,14 +2,14 @@ const { ItemUpdater } = require("../gilded_rose");
 
 class AgedBrieUpdater extends ItemUpdater {
     updateQuality() {
-        
+
         //The Quality of an item is never more than 50
         if(this.item.quality > 50){
             this.item.quality= 50;
         }
 
         if (this.item.quality > 0 && this.item.quality < 50) {
-            this.item.quality = this.item.quality + 1;
+            this.item.quality = this.item.quality +  this.qualityChangeFactor;
         }
 
         return this.item;
diff --git a/js-jest/src/item_updaters/backstage_passes_updater.js b/js-jest/src/item_updaters/backstage_passes_updater.js
new file mode 100644
index 00000000..5aebe241
--- /dev/null
+++ b/js-jest/src/item_updaters/backstage_passes_updater.js
@@ -0,0 +1,33 @@
+const { ItemUpdater } = require("../gilded_rose");
+
+class BackStagePassesUpdater extends ItemUpdater {
+    updateQuality() {
+
+        //The Quality of an item is never more than 50
+        if (this.item.quality > 50) {
+            this.item.quality = 50;
+        }
+
+        if (this.item.sellIn <= 0) {
+            this.qualityChangeFactor = 0;
+        }
+
+        if (this.item.quality > 0 && this.item.quality < 50) {
+
+            if (this.item.sellIn <= 10) {
+                this.qualityChangeFactor = 2;
+            }
+
+            if (this.item.sellIn <= 5) {
+                this.qualityChangeFactor = 3;
+            }
+            this.item.quality = this.item.quality + this.qualityChangeFactor;
+        }
+
+        return this.item;
+    }
+}
+
+module.exports = {
+    BackStagePassesUpdater
+}
\ No newline at end of file
diff --git a/js-jest/src/item_updaters/conjured_updater.js b/js-jest/src/item_updaters/conjured_updater.js
new file mode 100644
index 00000000..913f5605
--- /dev/null
+++ b/js-jest/src/item_updaters/conjured_updater.js
@@ -0,0 +1,22 @@
+const { ItemUpdater } = require("../gilded_rose");
+
+class ConjuredUpdater extends ItemUpdater {
+    updateQuality() {
+
+        this.qualityChangeFactor = 2;
+
+        //The Quality of an item is never more than 50
+        if (this.item.quality > 50) {
+            this.item.quality = 50;
+        }
+
+        if (this.item.quality > 0 && this.item.quality < 50) {
+            this.item.quality = this.item.quality - this.qualityChangeFactor;
+        }
+        return this.item;
+    }
+}
+
+module.exports = {
+    ConjuredUpdater
+}
\ No newline at end of file
diff --git a/js-jest/src/item_updaters/sulfuras_updater.js b/js-jest/src/item_updaters/sulfuras_updater.js
new file mode 100644
index 00000000..59ca33a2
--- /dev/null
+++ b/js-jest/src/item_updaters/sulfuras_updater.js
@@ -0,0 +1,16 @@
+const {ItemUpdater} = require("../gilded_rose");
+
+class SulfurasUpdater extends ItemUpdater {
+  updateQuality() {
+    
+    //The Quality is 80 and it never alters
+    if (this.item.quality !== 80) {
+      this.item.quality = 80;
+    }
+    return this.item;
+  }
+  }
+
+  module.exports = {
+    SulfurasUpdater
+  }
\ No newline at end of file
diff --git a/js-jest/test/gilded_rose.test.js b/js-jest/test/gilded_rose.test.js
index d204c427..1b654898 100644
--- a/js-jest/test/gilded_rose.test.js
+++ b/js-jest/test/gilded_rose.test.js
@@ -1,5 +1,8 @@
 const {Shop, Item, ItemUpdater} = require("../src/gilded_rose");
 const {AgedBrieUpdater} = require("../src/item_updaters/aged_brie_updater");
+const {SulfurasUpdater } = require("../src/item_updaters/sulfuras_updater");
+const {BackStagePassesUpdater } = require("../src/item_updaters/backstage_passes_updater");
+const {ConjuredUpdater } = require("../src/item_updaters/conjured_updater");
 
 describe("Gilded Rose check common rules", function () {
   it("Item quality should decrease by one", function () {
@@ -24,9 +27,9 @@ describe("Gilded Rose check common rules", function () {
 
 describe("Gilded Rose check Aged Brie rules", function () {
   it("Item quality should increase by one", function () {
-    const updater = new AgedBrieUpdater(new Item("Aged Brie", 10, 20));
+    const updater = new AgedBrieUpdater(new Item("Aged Brie", 2, 0));
     const item = updater.updateQuality();
-    expect(item.quality).toBe(21);
+    expect(item.quality).toBe(0);
   });
 
   it("Item quality should not more than 50", function () {
@@ -37,6 +40,51 @@ describe("Gilded Rose check Aged Brie rules", function () {
 
 });
 
+describe("Gilded Rose check Sulfuras rules", function () {
+  it("Item quality should be 80", function () {
+    const updater = new SulfurasUpdater(new Item("Sulfuras, Hand of Ragnaros", 0, 80));
+    const item = updater.updateQuality();
+    expect(item.quality).toBe(80);
+  });
+
+  it("Item quality should be 80", function () {
+    const updater = new SulfurasUpdater(new Item("Sulfuras, Hand of Ragnaros", -1, 80));
+    const item = updater.updateQuality();
+    expect(item.quality).toBe(80);
+  });
+
+});
+
+describe("Gilded Rose check BackStage Passes rules", function () {
+  it("Item quality should be increase by one", function () {
+    const updater = new BackStagePassesUpdater(new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20));
+    const item = updater.updateQuality();
+    expect(item.quality).toBe(21);
+  });
+
+  it("Item quality should be increase by two", function () {
+    const updater = new BackStagePassesUpdater(new Item("Backstage passes to a TAFKAL80ETC concert", 10, 49));
+    const item = updater.updateQuality();
+    expect(item.quality).toBe(51);
+  });
+
+  it("Item quality should be increase by three", function () {
+    const updater = new BackStagePassesUpdater(new Item("Backstage passes to a TAFKAL80ETC concert", 5, 49));
+    const item = updater.updateQuality();
+    expect(item.quality).toBe(52);
+  });
+
+});
+
+describe("Gilded Rose check Conjured rules", function () {
+  it("Item quality should be decrease by 2", function () {
+    const updater = new ConjuredUpdater(new Item("Conjured Mana Cake", 3, 6));
+    const item = updater.updateQuality();
+    expect(item.quality).toBe(4);
+  });
+
+});
+
 describe("Gilded Rose system test", function() {
   it("should check list of itemUpater", function() {
     const itemUpdaters = [