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diff --git a/sources/pyside6/tests/QtWidgets/qapp_issue_585.py b/sources/pyside6/tests/QtWidgets/qapp_issue_585.py
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+++ b/sources/pyside6/tests/QtWidgets/qapp_issue_585.py
@@ -0,0 +1,76 @@
+#############################################################################
+##
+## Copyright (C) 2018 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the test suite of Qt for Python.
+##
+## $QT_BEGIN_LICENSE:GPL-EXCEPT$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 as published by the Free Software
+## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+"""
+The bug was caused by this commit:
+"Support the qApp macro correctly, final version incl. debug"
+e30e0c161b2b4d50484314bf006e9e5e8ff6b380
+2017-10-27
+
+The bug was first solved by this commit:
+"Fix qApp macro refcount"
+b811c874dedd14fd8b072bc73761d39255216073
+2018-03-21
+
+This test triggers the refcounting bug of qApp, issue PYSIDE-585.
+Finally, the real patch included more changes, because another error
+was in the ordering of shutdown calls. It was found using the following
+Python configuration:
+
+    In Python 3.6 create a directory 'debug' and cd into it.
+
+    ../configure --with-pydebug --prefix=$HOME/pydebug/ --enable-shared
+
+Then a lot more refcounting errors show up, which are due to a bug in
+the code position of the shutdown procedure.
+The reason for the initial refcount bug was that the shutdown code is once
+more often called than the creation of the qApp wrapper.
+Finally, it was easiest and more intuitive to simply make the refcount of
+qApp_content equal to that of Py_None, which is also not supposed to be
+garbage-collected.
+
+For some reason, the test does not work as a unittest because it creates
+no crash. We leave it this way.
+"""
+
+import os
+import sys
+
+sys.path.append(os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "util"))
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from init_paths import init_test_paths
+init_test_paths()
+
+from PySide6.QtCore import QTimer
+from PySide6 import QtWidgets
+
+app_instance = QtWidgets.QApplication([])
+# If the following line is commented, application doesn't crash on exit anymore.
+app_instance2 = app_instance
+QTimer.singleShot(0, qApp.quit)
+app_instance.exec_()