Merge "Fix valgrind issue with thread_pool_test."
diff --git a/runtime/thread_pool_test.cc b/runtime/thread_pool_test.cc
index 2ae2ecf..89e9005 100644
--- a/runtime/thread_pool_test.cc
+++ b/runtime/thread_pool_test.cc
@@ -114,6 +114,8 @@
   thread_pool.StopWorkers(self);
 
   thread_pool.Wait(self, false, false);  // We should not deadlock here.
+  // Drain the task list.
+  thread_pool.Wait(self, /* do_work */ true, false);  // We should not deadlock here.
 }
 
 class TreeTask : public Task {