I can see the test_typing issue with this patch:

diff --git a/Lib/test/libregrtest/refleak.py b/Lib/test/libregrtest/refleak.py
index b94826a5da..49e5f03414 100644
--- a/Lib/test/libregrtest/refleak.py
+++ b/Lib/test/libregrtest/refleak.py
@@ -124,7 +124,7 @@ def check_rc_deltas(deltas):
         #
         #   [5, 5, 6]
         #   [10, 1, 1]
-        return all(delta >= 1 for delta in deltas)
+        return any(delta >= 1 for delta in deltas)
 
     def check_fd_deltas(deltas):
         return any(deltas)


Examples:

$ ./python -m test test_typing -R 3:20
(...)
beginning 23 repetitions
12345678901234567890123
.......................
test_typing leaked [1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] memory blocks, sum=3
test_typing failed (reference leak)


$ ./python -m test test_typing -R 1:20
WARNING: Running tests with --huntrleaks/-R and less than 3 warmup repetitions can give false positives!
(...)
beginning 21 repetitions
123456789012345678901
.....................
test_typing leaked [6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] references, sum=6
test_typing leaked [4, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] memory blocks, sum=7
test_typing failed (reference leak)
(...)