diff --git a/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/src/Processor/DataProcessor.cs b/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/src/Processor/DataProcessor.cs
index c5a4665c09a25..4160b862d8729 100644
--- a/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/src/Processor/DataProcessor.cs
+++ b/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/src/Processor/DataProcessor.cs
@@ -143,13 +143,14 @@ public static RawTestResult GetRawResultObject(TestResult? testResultSource)
         {
             if (testResultSource == null)
                 return new RawTestResult();
-            List <MPTError> errors = new();//[testResultSource.ErrorMessage];
+            List <MPTError> errors = new();
             if (testResultSource.ErrorMessage != null)
                 errors.Add(new MPTError() { message = testResultSource.ErrorMessage });
+            if (testResultSource.ErrorStackTrace != null)
+                errors.Add(new MPTError() { message = testResultSource.ErrorStackTrace });
             var rawTestResult = new RawTestResult
             {
-                errors = JsonSerializer.Serialize(errors),
-                stdErr = testResultSource?.ErrorStackTrace ?? string.Empty
+                errors = JsonSerializer.Serialize(errors)
             };
             return rawTestResult;
         }
diff --git a/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/tests/Processor/DataProcessorTests.cs b/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/tests/Processor/DataProcessorTests.cs
index 42b423e35767d..ebf5745770256 100644
--- a/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/tests/Processor/DataProcessorTests.cs
+++ b/sdk/playwrighttesting/Azure.Developer.MicrosoftPlaywrightTesting.TestLogger/tests/Processor/DataProcessorTests.cs
@@ -160,6 +160,22 @@ public void GetRawResultObject_WithNullTestResult_ReturnsRawTestResultWithEmptyE
             Assert.AreEqual("[]", result.stdErr);
         }
 
+        [Test]
+        public void GetRawResultObject_WithNullErrorStackTrace_ReturnsRawTestResultWithEmptyErrorsAndStdErr()
+        {
+            var testResult = new TestResult(new TestCase("Test", new System.Uri("file:///test.cs"), "TestNamespace.TestClass"))
+            {
+                ErrorMessage = null,
+                ErrorStackTrace = null
+            };
+
+            RawTestResult result = DataProcessor.GetRawResultObject(testResult);
+
+            Assert.IsNotNull(result);
+            Assert.AreEqual("[]", result.errors);
+            Assert.AreEqual("[]", result.stdErr);
+        }
+
         [Test]
         public void GetRawResultObject_WithNonNullTestResult_ReturnsRawTestResultWithErrorsAndStdErr()
         {
@@ -172,8 +188,7 @@ public void GetRawResultObject_WithNonNullTestResult_ReturnsRawTestResultWithErr
             RawTestResult result = DataProcessor.GetRawResultObject(testResult);
 
             Assert.IsNotNull(result);
-            Assert.AreEqual("[{\"message\":\"An error occurred\"}]", result.errors);
-            Assert.AreEqual("Error stack trace", result.stdErr);
+            Assert.AreEqual("[{\"message\":\"An error occurred\"},{\"message\":\"Error stack trace\"}]", result.errors);
         }
     }
 }