Closes issue 21239. unittest.mock.patch.stopall() did not work deterministically when the same name was patched multiple times.
diff --git a/NEWS b/NEWS
index 6ec5a00..e84f59d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+- Issue #21239: patch.stopall() didn't work deterministically when the same
+  name was patched more than once.
+
 - Issue #21222: Passing name keyword argument to mock.create_autospec now
   works.