try seeing if just clearing this ahead of time helps

diff --git a/test/engine/test_pool.py b/test/engine/test_pool.py
index 42ab18faa689b2f3bfd9b88c463539c8e4b7d8b4..84eb3f65684f0509c71fe611251c7047df016d14 100644 (file)
--- a/test/engine/test_pool.py
+++ b/test/engine/test_pool.py
@@ -989,6 +989,7 @@ class QueuePoolTest(PoolTestBase):
         self._test_overflow(40, 5)
 
     def test_mixed_close(self):
+        pool._refs.clear()
         p = self._queuepool_fixture(pool_size=3, max_overflow=-1, use_threadlocal=True)
         c1 = p.connect()
         c2 = p.connect()