Put this code into a child test: public override void OnAfterTestCompleted(TestResult result) { base.OnAfterTestCompleted(result); string parentName = Convert.ToString(result.Parent.Name); string parentId = Convert.ToString(result.Parent.Id); string parentRootName = Convert.ToString(result.Parent.RootName); string fileName = Convert.ToString(result.Parent.FileName); //custom code to write to the log } Now run the parent test that calls this child test. Expected: The test to pass Actual: >>> Test-as-Step 'TestResultParentIssue\Child.tstest' log starts: ------------------------------------------------------------ '4/4/2014 3:24:55 PM' - Detected custom code in test. Locating test assembly: Telerik Troubleshooting.dll. '4/4/2014 3:24:55 PM' - Assembly Found: F:\Dropbox\Support Issues\Telerik Troubleshooting\Telerik Troubleshooting\bin\Telerik Troubleshooting.dll '4/4/2014 3:24:55 PM' - Loading code class: 'Telerik_Troubleshooting.Child'. ------------------------------------------------------------ '4/4/2014 3:24:56 PM' - Error attempting to execute a Test As Step. Details: '4/4/2014 3:24:56 PM' - System.NullReferenceException: Object reference not set to an instance of an object. at Telerik_Troubleshooting.Child.OnAfterTestCompleted(TestResult result) in f:\Dropbox\Support Issues\Telerik Troubleshooting\Telerik Troubleshooting\TestResultParentIssue\Child.tstest.cs:line 78 at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.InternalExecuteTestIteration(Object codeBehindInstance, Boolean isDataDriven) at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.InternalExecuteTest(Test test, TestResult initializationResult) at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.ExecuteTestInCurrentContext(Test test) <<< Test-as-Step 'TestResultParentIssue\Child.tstest' log ends. Upon closer inspection you will find that TestResult.Parent is null.