diff --git a/cassandra/pool.py b/cassandra/pool.py
index a8e54d05..9c280366 100644
--- a/cassandra/pool.py
+++ b/cassandra/pool.py
@@ -509,6 +509,9 @@ class HostConnectionPool(object):
             conn.close()
             self.open_count -= 1
 
+        for conn in self._trash:
+            conn.close()
+
     def ensure_core_connections(self):
         if self.is_shutdown:
             return