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 05c0487f85741e8261872b45f6bda6fadff89b26..3f1d9d0ef82c08d5fbc89fa7607ec7fe48ab80e7 100644 (file)
--- a/test/engine/test_pool.py
+++ b/test/engine/test_pool.py
@@ -987,6 +987,7 @@ 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()