diff --git a/spec/cbor_spec.cr b/spec/cbor_spec.cr
index c2de2d8..56eaa99 100644
--- a/spec/cbor_spec.cr
+++ b/spec/cbor_spec.cr
@@ -58,6 +58,19 @@ describe CBOR do
     end
   end
 
+  describe "UUID" do
+    it "UUID#to_cbor" do
+      uuid = UUID.new "fc47eb8e-b13c-481e-863a-8f8c47a550f2"
+      uuid.to_cbor.hexstring.should eq "50fc47eb8eb13c481e863a8f8c47a550f2"
+    end
+
+    it "UUID#from_cbor" do
+      uuid = UUID.from_cbor "50fc47eb8eb13c481e863a8f8c47a550f2".hexbytes
+      uuid.to_cbor.hexstring.should eq "50fc47eb8eb13c481e863a8f8c47a550f2"
+    end
+  end
+
+
   describe "CBOR library annotations and features" do
     it "Person#from_cbor with unmapped values" do
       h = Hash(String | Int32, String | Int32).new