diff --git a/src/Umbraco.Tests/Persistence/Repositories/ContentTypeRepositoryTest.cs b/src/Umbraco.Tests/Persistence/Repositories/ContentTypeRepositoryTest.cs
index 8a93ede9a3..af40b4de92 100644
--- a/src/Umbraco.Tests/Persistence/Repositories/ContentTypeRepositoryTest.cs
+++ b/src/Umbraco.Tests/Persistence/Repositories/ContentTypeRepositoryTest.cs
@@ -332,6 +332,9 @@ namespace Umbraco.Tests.Persistence.Repositories
                 var contentType = (IContentType)MockedContentTypes.CreateSimpleContentType2("test", "Test", propertyGroupName: "testGroup");
 
                 Assert.AreEqual(4, contentType.PropertyTypes.Count());
+
+                // remove all templates - since they are not saved, they would break the (wtf) mapping code
+                contentType.AllowedTemplates = new ITemplate[0];
 
                 // there is NO mapping from display to contentType, but only from save
                 // to contentType, so if we want to test, let's to it properly!