diff --git a/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.Http.cs b/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.Http.cs
index 8939cca759b19..53d45b99678e9 100644
--- a/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.Http.cs
+++ b/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.Http.cs
@@ -81,9 +81,23 @@ await HttpClient_ActionInDifferentThread(url, executor1, executor2, async (HttpR
                 await Assert.ThrowsAsync<TaskCanceledException>(async () =>
                 {
                     CancellationTokenSource cts = new CancellationTokenSource();
-                    var promise = response.Content.ReadAsStringAsync(cts.Token);
-                    cts.Cancel();
-                    await promise;
+                    try
+                    {
+                        var promise = response.Content.ReadAsStringAsync(cts.Token);
+                        Console.WriteLine("HttpClient_CancelInDifferentThread: ManagedThreadId: " + Environment.CurrentManagedThreadId + " NativeThreadId: " + WebWorkerTestHelper.NativeThreadId);
+                        cts.Cancel();
+                        await promise;
+                    }
+                    catch (TaskCanceledException ex)
+                    {
+                        Console.WriteLine("HttpClient_CancelInDifferentThread: TaskCanceledException is thrown with message: " + ex.ToString());
+                        throw;
+                    }
+                    catch (OperationCanceledException ex)
+                    {
+                        Console.WriteLine("HttpClient_CancelInDifferentThread: OperationCanceledException is thrown with message: " + ex.ToString());
+                        throw;
+                    }
                 });
             });
         }
diff --git a/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.cs b/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.cs
index c88d32277da8b..dfb598419e391 100644
--- a/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.cs
+++ b/src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System/Runtime/InteropServices/JavaScript/WebWorkerTest.cs
@@ -364,18 +364,20 @@ public async Task ThreadingTimer(Executor executor)
             await executor.Execute(async () =>
             {
                 TaskCompletionSource tcs = new TaskCompletionSource();
+                Console.WriteLine("ThreadingTimer: Start Time: " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + " ManagedThreadId: " + Environment.CurrentManagedThreadId + " NativeThreadId: " + WebWorkerTestHelper.NativeThreadId);
 
                 using var timer = new Timer(_ =>
                 {
                     Assert.NotEqual(1, Environment.CurrentManagedThreadId);
                     Assert.True(Thread.CurrentThread.IsThreadPoolThread);
-                    tcs.SetResult();
                     hit = true;
+                    tcs.SetResult();
                 }, null, 100, Timeout.Infinite);
 
                 await tcs.Task;
             }, cts.Token);
 
+            Console.WriteLine("ThreadingTimer: End Time: " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + " ManagedThreadId: " + Environment.CurrentManagedThreadId + " NativeThreadId: " + WebWorkerTestHelper.NativeThreadId);
             Assert.True(hit);
         }
 
@@ -451,7 +453,7 @@ await executor.Execute(Task () =>
                 {
                     exception = ex;
                 }
-
+                Console.WriteLine("WaitAssertsOnJSInteropThreads: ExecuterType: " + executor.Type + " ManagedThreadId: " + Environment.CurrentManagedThreadId + " NativeThreadId: " + WebWorkerTestHelper.NativeThreadId);
                 executor.AssertBlockingWait(exception);
 
                 return Task.CompletedTask;