diff --git a/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs b/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs
index b1be8a744fe323..4d2c89ba14db57 100644
--- a/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs
+++ b/src/libraries/System.Threading.Tasks/tests/CancellationTokenTests.cs
@@ -1787,7 +1787,9 @@ public static void CancellationTokenSource_CancelAsync_AllCallbacksInvoked()
             Task t = cts.CancelAsync();
             Assert.True(cts.IsCancellationRequested);
 
-            t.Wait(); // synchronously block to ensure this thread isn't reused
+            ((IAsyncResult)t).AsyncWaitHandle.WaitOne(); // synchronously block without inlining to ensure this thread isn't reused
+            t.Wait(); // propagate any exceptions
+
             Assert.Equal(Iters * (Iters + 1) / 2, sum);
         }