diff --git a/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs b/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs
index 52ab34baee..adf82d74bd 100644
--- a/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs
+++ b/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Entities/EntityHelper_Tests.cs
@@ -55,6 +55,11 @@ public class EntityHelper_Tests
         {
             return new object[] { Id };
         }
+
+        public string GetObjectKey()
+        {
+            return Id.ToString();
+        }
     }
 
     private class MyEntityDisablesIdGeneration : Entity<Guid>