Fix ThreadPool events validation test (#48588)

* Fix ThreadPool events validation test

* space

diff --git a/src/tests/tracing/eventpipe/eventsvalidation/ThreadPool.cs b/src/tests/tracing/eventpipe/eventsvalidation/ThreadPool.cs
index 08c7f57..37a58ed 100644 (file)
--- a/src/tests/tracing/eventpipe/eventsvalidation/ThreadPool.cs
+++ b/src/tests/tracing/eventpipe/eventsvalidation/ThreadPool.cs
@@ -48,6 +48,7 @@ namespace Tracing.Tests.GCFinalizers
                     return total;
                 });
             }
+            Task.WaitAll(tasks);
         };
 
         private static Func<EventPipeEventSource, Func<int>> _DoesTraceContainEvents = (source) =>