One final fix to the descriptor test on Windows.

pkg/scheduled_test/test/descriptor_test.dart

Index: pkg/scheduled_test/test/descriptor_test.dart
diff --git a/pkg/scheduled_test/test/descriptor_test.dart b/pkg/scheduled_test/test/descriptor_test.dart
index 13d38a74bc7fd1998c61ecae8cd292d60b17c5af..2b71e8a7bbacca3ec9d1cafd9d12a19eeda42bd8 100644
--- a/pkg/scheduled_test/test/descriptor_test.dart
+++ b/pkg/scheduled_test/test/descriptor_test.dart
@@ -709,7 +709,7 @@ void main() {
         d.file('name.txt', 'contents')
       ]);
 
-      expect(byteStreamToString(dir.load(path.join('subdir', 'name.txt'))),
+      expect(byteStreamToString(dir.load('subdir/name.txt')),
           completion(equals('subcontents')));
     });
   });