diff --git a/src/Umbraco.Tests/Models/ContentTypeTests.cs b/src/Umbraco.Tests/Models/ContentTypeTests.cs
index af94f80fd4..0fc1a52a28 100644
--- a/src/Umbraco.Tests/Models/ContentTypeTests.cs
+++ b/src/Umbraco.Tests/Models/ContentTypeTests.cs
@@ -24,6 +24,69 @@ namespace Umbraco.Tests.Models
 
         }
 
+        [Test]
+        public void Can_Deep_Clone_Content_Type_With_Reset_Identities()
+        {
+            var contentType = MockedContentTypes.CreateTextpageContentType();
+            contentType.Id = 99;
+
+            var i = 200;
+            foreach (var propertyType in contentType.PropertyTypes)
+            {
+                propertyType.Id = ++i;
+            }
+            foreach (var group in contentType.PropertyGroups)
+            {
+                group.Id = ++i;
+            }
+            //add a property type without a property group
+            contentType.PropertyTypeCollection.Add(
+                new PropertyType(new Guid(), DataTypeDatabaseType.Ntext) { Alias = "title2", Name = "Title2", Description = "", HelpText = "", Mandatory = false, SortOrder = 1, DataTypeDefinitionId = -88 });
+
+            contentType.AllowedTemplates = new[] { new Template("-1,2", "Name", "name") { Id = 200 }, new Template("-1,3", "Name2", "name2") { Id = 201 } };
+            contentType.AllowedContentTypes = new[] { new ContentTypeSort(new Lazy<int>(() => 888), 8, "sub"), new ContentTypeSort(new Lazy<int>(() => 889), 9, "sub2") };
+            contentType.Id = 10;
+            contentType.CreateDate = DateTime.Now;
+            contentType.CreatorId = 22;
+            contentType.SetDefaultTemplate(new Template("-1,2,3,4", "Test Template", "testTemplate")
+            {
+                Id = 88
+            });
+            contentType.Description = "test";
+            contentType.Icon = "icon";
+            contentType.IsContainer = true;
+            contentType.Thumbnail = "thumb";
+            contentType.Key = Guid.NewGuid();
+            contentType.Level = 3;
+            contentType.Path = "-1,4,10";
+            contentType.SortOrder = 5;
+            contentType.Trashed = false;
+            contentType.UpdateDate = DateTime.Now;
+
+            //ensure that nothing is marked as dirty
+            contentType.ResetDirtyProperties(false);
+
+            var clone = (ContentType)contentType.Clone("newAlias");
+
+            Assert.AreEqual("newAlias", clone.Alias);
+            Assert.AreNotEqual("newAlias", contentType.Alias);
+            Assert.IsFalse(clone.HasIdentity);
+
+            foreach (var propertyGroup in clone.PropertyGroups)
+            {
+                Assert.IsFalse(propertyGroup.HasIdentity);
+                foreach (var propertyType in propertyGroup.PropertyTypes)
+                {
+                    Assert.IsFalse(propertyType.HasIdentity);
+                }
+            }
+
+            foreach (var propertyType in clone.PropertyTypes.Where(x => x.HasIdentity))
+            {
+                Assert.IsFalse(propertyType.HasIdentity);
+            }
+        }
+
         [Test]
         public void Can_Deep_Clone_Content_Type()
         {
@@ -36,6 +99,10 @@ namespace Umbraco.Tests.Models
             {
                 propertyType.Id = ++i;
             }
+            foreach (var group in contentType.PropertyGroups)
+            {
+                group.Id = ++i;
+            }
             contentType.AllowedTemplates = new[] { new Template("-1,2", "Name", "name") { Id = 200 }, new Template("-1,3", "Name2", "name2") { Id = 201 } };
             contentType.AllowedContentTypes = new[] {new ContentTypeSort(new Lazy<int>(() => 888), 8, "sub"), new ContentTypeSort(new Lazy<int>(() => 889), 9, "sub2")};
             contentType.Id = 10;