diff --git a/ruby/gilded_rose_spec.rb b/ruby/gilded_rose_spec.rb
index 269fe1b0..1ad468f8 100644
--- a/ruby/gilded_rose_spec.rb
+++ b/ruby/gilded_rose_spec.rb
@@ -1,3 +1,5 @@
+require 'rspec'
+
 require File.join(File.dirname(__FILE__), 'gilded_rose')
 
 describe GildedRose do
@@ -6,7 +8,71 @@ describe GildedRose do
     it "does not change the name" do
       items = [Item.new("foo", 0, 0)]
       GildedRose.new(items).update_quality()
-      expect(items[0].name).to eq "fixme"
+      expect(items[0].name).to eq "foo"
+    end
+
+    it 'decreases the sell_in and quality for regular items' do
+      item = Item.new('Regular Item', 5, 10)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(9)
+      expect(item.sell_in).to eq(4)
+    end
+
+    it 'decreases quality twice as fast when sell_in is negative for regular items' do
+      item = Item.new('Regular Item', 0, 10)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(8)
+    end
+
+    it 'increases the quality of Aged Brie' do
+      item = Item.new('Aged Brie', 5, 10)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(11)
+    end
+
+    it 'does not increase the quality of Aged Brie beyond 50' do
+      item = Item.new('Aged Brie', 5, 50)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(50)
+    end
+
+    it 'increases the quality of Backstage passes as sell_in approaches' do
+      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 11, 20)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(21)
+    end
+
+    it 'increases the quality of Backstage passes by 2 when sell_in is 10 or less' do
+      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 10, 20)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(22)
+    end
+
+    it 'increases the quality of Backstage passes by 3 when sell_in is 5 or less' do
+      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 5, 20)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(23)
+    end
+
+    it 'sets the quality of Backstage passes to 0 after the concert' do
+      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 0, 20)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(0)
+    end
+
+    it 'does not decrease the quality of Sulfuras' do
+      item = Item.new('Sulfuras, Hand of Ragnaros', 5, 80)
+      gilded_rose = GildedRose.new([item])
+      gilded_rose.update_quality
+      expect(item.quality).to eq(80)
     end
   end