diff --git a/src/Umbraco.Tests.Common/Builders/PropertyBuilder.cs b/src/Umbraco.Tests.Common/Builders/PropertyBuilder.cs
index 400cf88281..6cb7a431f2 100644
--- a/src/Umbraco.Tests.Common/Builders/PropertyBuilder.cs
+++ b/src/Umbraco.Tests.Common/Builders/PropertyBuilder.cs
@@ -5,7 +5,7 @@ using Umbraco.Tests.Common.Builders.Interfaces;
 namespace Umbraco.Tests.Common.Builders
 {
     public class PropertyBuilder
-        : BuilderBase<Property>,
+        : BuilderBase<IProperty>,
             IBuildPropertyTypes,
             IWithIdBuilder,
             IWithKeyBuilder,
@@ -26,7 +26,7 @@ namespace Umbraco.Tests.Common.Builders
             return builder;
         }
 
-        public override Property Build()
+        public override IProperty Build()
         {
             var id = _id ?? 1;
             var key = _key ?? Guid.NewGuid();
diff --git a/src/Umbraco.Tests.UnitTests/Umbraco.Infrastructure/Models/PropertyTests.cs b/src/Umbraco.Tests.UnitTests/Umbraco.Infrastructure/Models/PropertyTests.cs
index 45ed2bd0aa..6d0e4f8d56 100644
--- a/src/Umbraco.Tests.UnitTests/Umbraco.Infrastructure/Models/PropertyTests.cs
+++ b/src/Umbraco.Tests.UnitTests/Umbraco.Infrastructure/Models/PropertyTests.cs
@@ -38,13 +38,10 @@ namespace Umbraco.Tests.UnitTests.Umbraco.Infrastructure.Models
             }
         }
 
-        private Property BuildProperty()
+        private IProperty BuildProperty()
         {
             return _builder
                 .WithId(4)
-                .WithKey(Guid.NewGuid())
-                .WithCreateDate(DateTime.Now)
-                .WithUpdateDate(DateTime.Now)
                 .AddPropertyType()
                     .WithId(3)
                     .WithPropertyEditorAlias("TestPropertyEditor")