diff --git a/oslo/db/sqlalchemy/utils.py b/oslo/db/sqlalchemy/utils.py
index ccac7cd..dd891b6 100644
--- a/oslo/db/sqlalchemy/utils.py
+++ b/oslo/db/sqlalchemy/utils.py
@@ -683,7 +683,8 @@ def is_backend_avail(backend, database, user=None, passwd=None):
                                      user=user,
                                      passwd=passwd)
     try:
-        provision.Backend._ensure_backend_available(connect_uri)
+        eng = provision.Backend._ensure_backend_available(connect_uri)
+        eng.dispose()
     except exception.BackendNotAvailable:
         return False
     else: