--- /dev/null
+--TEST--
+Sybase-CT close
+--SKIPIF--
+<?php require('skipif.inc'); ?>
+--FILE--
+<?php
+/* This file is part of PHP test framework for ext/sybase_ct
+ *
+ * $Id$
+ */
+
+ require('test.inc');
+
+ $db= sybase_connect_ex();
+ var_dump($db);
+ sybase_close($db);
+ var_dump($db);
+ var_dump(sybase_query('select getdate()', $db));
+?>
+--EXPECTF--
+resource(%d) of type (sybase-ct link)
+resource(%d) of type (Unknown)
+
+Warning: sybase_query(): %d is not a valid Sybase-Link resource in %s on line %d
+bool(false)
--- /dev/null
+--TEST--
+Sybase-CT close default connection
+--SKIPIF--
+<?php require('skipif.inc'); ?>
+--FILE--
+<?php
+/* This file is part of PHP test framework for ext/sybase_ct
+ *
+ * $Id$
+ */
+
+ require('test.inc');
+
+ sybase_connect_ex();
+ sybase_close();
+ var_dump(sybase_query('select getdate()'));
+?>
+--EXPECTF--
+
+Warning: sybase_query(): Sybase: No connection in %s on line %d
+bool(false)
--- /dev/null
+--TEST--
+Sybase-CT close not open
+--SKIPIF--
+<?php require('skipif.inc'); ?>
+--FILE--
+<?php
+/* This file is part of PHP test framework for ext/sybase_ct
+ *
+ * $Id$
+ */
+
+ require('test.inc');
+
+ sybase_close();
+?>
+--EXPECTF--
+
+Warning: sybase_close(): Sybase: No connection to close in %s on line %d