diff --git a/src/libraries/System.Threading.Overlapped/tests/OverlappedTests.cs b/src/libraries/System.Threading.Overlapped/tests/OverlappedTests.cs
index 8eb2928e1ece00..0079184706b202 100644
--- a/src/libraries/System.Threading.Overlapped/tests/OverlappedTests.cs
+++ b/src/libraries/System.Threading.Overlapped/tests/OverlappedTests.cs
@@ -160,6 +160,7 @@ public static unsafe void PackPosTest()
             Assert.True(ThreadPool.UnsafeQueueNativeOverlapped(nativeOverlapped));
 
             Assert.True(helper.Wait());
+            GC.KeepAlive(helper);
         }
         finally
         {
@@ -184,6 +185,7 @@ public static unsafe void PackPosTest1()
             Assert.True(ThreadPool.UnsafeQueueNativeOverlapped(nativeOverlapped));
 
             Assert.True(helper.Wait());
+            GC.KeepAlive(helper);
         }
         finally
         {