Add some more suppressions.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index 84b228f5aeddfea7a0aa523c75292dcb6f897207..5094010ef395ac4d583c3993149c7c81cf53374e 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -104,6 +104,10 @@ async/timer_not_available_test: Skip # only meant to test when there is no way t
 mirrors/library_uri_io_test: Skip # Not intended for drt as it uses dart:io.
 async/run_async6_test: Fail # Issue 10910
 
+[ $compiler == none && $runtime == drt && $system == windows ]
+async/multiple_timer_test: Fail # See Issue 10982
+async/timer_test: Fail # See Issue 10982
+
 [ $arch == simarm ]
 *: Skip