diff --git a/src/Orleans.Transactions.TestKit.Base/Grains/ITransactionCoordinatorGrain.cs b/src/Orleans.Transactions.TestKit.Base/Grains/ITransactionCoordinatorGrain.cs
index e7d0222e81a..b6adae108dc 100644
--- a/src/Orleans.Transactions.TestKit.Base/Grains/ITransactionCoordinatorGrain.cs
+++ b/src/Orleans.Transactions.TestKit.Base/Grains/ITransactionCoordinatorGrain.cs
@@ -24,7 +24,7 @@ public interface ITransactionCoordinatorGrain : IGrainWithGuidKey
         Task MultiGrainDoubleByWRWR(List<ITransactionTestGrain> grains, int numberToAdd);
 
         [Transaction(TransactionOption.Create)]
-        Task OrphanCallTransaction(ITransactionTestGrain grain);
+        Task OrphanCallTransaction();
 
         [Transaction(TransactionOption.Create)]
         Task AddAndThrow(ITransactionTestGrain grain, int numberToAdd);
diff --git a/src/Orleans.Transactions.TestKit.Base/Grains/TransactionCoordinatorGrain.cs b/src/Orleans.Transactions.TestKit.Base/Grains/TransactionCoordinatorGrain.cs
index 6d1c38b67fc..0f55f533c08 100644
--- a/src/Orleans.Transactions.TestKit.Base/Grains/TransactionCoordinatorGrain.cs
+++ b/src/Orleans.Transactions.TestKit.Base/Grains/TransactionCoordinatorGrain.cs
@@ -3,6 +3,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using Orleans.Concurrency;
+using Orleans.Transactions;
 using Orleans.Transactions.Abstractions;
 using Orleans.Transactions.TestKit.Correctnesss;
 
@@ -26,9 +27,9 @@ public Task MultiGrainDouble(List<ITransactionTestGrain> grains)
             return Task.WhenAll(grains.Select(Double));
         }
 
-        public Task OrphanCallTransaction(ITransactionTestGrain grain)
+        public Task OrphanCallTransaction()
         {
-            _ = grain.Add(1000);
+            _ = TransactionContext.GetRequiredTransactionInfo().Fork();
             return Task.CompletedTask;
         }
 
diff --git a/src/Orleans.Transactions.TestKit.Base/TestRunners/GrainFaultTransactionTestRunner.cs b/src/Orleans.Transactions.TestKit.Base/TestRunners/GrainFaultTransactionTestRunner.cs
index 6b349b6ff7d..16527a540da 100644
--- a/src/Orleans.Transactions.TestKit.Base/TestRunners/GrainFaultTransactionTestRunner.cs
+++ b/src/Orleans.Transactions.TestKit.Base/TestRunners/GrainFaultTransactionTestRunner.cs
@@ -145,7 +145,7 @@ public virtual async Task AbortTransactionOnOrphanCalls(string grainStates)
             ITransactionCoordinatorGrain coordinator = this.grainFactory.GetGrain<ITransactionCoordinatorGrain>(Guid.NewGuid());
 
             await grain.Set(expected);
-            Func<Task> task = () => coordinator.OrphanCallTransaction(grain);
+            Func<Task> task = () => coordinator.OrphanCallTransaction();
             await task.Should().ThrowAsync<OrleansOrphanCallException>();
 
             //await Task.Delay(20000); // give time for GC
diff --git a/src/api/Orleans.Transactions.TestKit.Base/Orleans.Transactions.TestKit.Base.cs b/src/api/Orleans.Transactions.TestKit.Base/Orleans.Transactions.TestKit.Base.cs
index c9562e915be..aa672cfca44 100644
--- a/src/api/Orleans.Transactions.TestKit.Base/Orleans.Transactions.TestKit.Base.cs
+++ b/src/api/Orleans.Transactions.TestKit.Base/Orleans.Transactions.TestKit.Base.cs
@@ -323,7 +323,7 @@ public partial interface ITransactionCoordinatorGrain : IGrainWithGuidKey, IGrai
         [Transaction(TransactionOption.Create)]
         System.Threading.Tasks.Task MultiGrainSetBit(System.Collections.Generic.List<Correctnesss.ITransactionalBitArrayGrain> grains, int bitIndex);
         [Transaction(TransactionOption.Create)]
-        System.Threading.Tasks.Task OrphanCallTransaction(ITransactionTestGrain grain);
+        System.Threading.Tasks.Task OrphanCallTransaction();
         [Transaction(TransactionOption.Create)]
         [Concurrency.ReadOnly]
         System.Threading.Tasks.Task UpdateViolated(ITransactionTestGrain grains, int numberToAdd);
@@ -719,7 +719,7 @@ public partial class TransactionCoordinatorGrain : Grain, ITransactionCoordinato
 
         public System.Threading.Tasks.Task MultiGrainSetBit(System.Collections.Generic.List<Correctnesss.ITransactionalBitArrayGrain> grains, int bitIndex) { throw null; }
 
-        public System.Threading.Tasks.Task OrphanCallTransaction(ITransactionTestGrain grain) { throw null; }
+        public System.Threading.Tasks.Task OrphanCallTransaction() { throw null; }
 
         public System.Threading.Tasks.Task UpdateViolated(ITransactionTestGrain grain, int numberToAdd) { throw null; }
     }