added missing cleanup

src/ZODB/tests/testblob.py

@@ -350,6 +350,7 @@ Works with savepoints too:
     >>> logger.setLevel(0)
     >>> logger.removeHandler(handler)
 
+    >>> database.close()
     """
 
 
@@ -534,6 +535,7 @@ def do_not_depend_on_cwd():
     >>> conn.root()['blob'].open().read()
     'data'
 
+    >>> bs.close()
     """
 
 def setUp(test):