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diff --git a/sources/pyside6/tests/registry/util.py b/sources/pyside6/tests/registry/util.py
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+++ b/sources/pyside6/tests/registry/util.py
@@ -0,0 +1,181 @@
+#############################################################################
+##
+## Copyright (C) 2017 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of Qt for Python.
+##
+## $QT_BEGIN_LICENSE:LGPL$
+## 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 Lesser General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU Lesser
+## General Public License version 3 as published by the Free Software
+## Foundation and appearing in the file LICENSE.LGPL3 included in the
+## packaging of this file. Please review the following information to
+## ensure the GNU Lesser General Public License version 3 requirements
+## will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 2.0 or (at your option) the GNU General
+## Public license version 3 or any later version approved by the KDE Free
+## Qt Foundation. The licenses are as published by the Free Software
+## Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+## 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-2.0.html and
+## https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from __future__ import print_function, absolute_import
+
+"""
+Supporting isolation of warnings
+
+Warnings in unittests are not isolated.
+We sometimes use warnings to conveniently accumulate error messages
+and eventually report them afterwards as error.
+"""
+
+import sys
+import os
+import warnings
+import re
+from contextlib import contextmanager
+
+warn_name = "__warningregistry__"
+ignore_re = 'Not importing directory .*'
+
+@contextmanager
+def isolate_warnings():
+    save_warnings = {}
+    for name, mod in sys.modules.items():
+        if mod and hasattr(mod, warn_name):
+            save_warnings[name] = mod.__dict__[warn_name]
+            delattr(mod, warn_name)
+        else:
+            save_warnings[name] = None
+    yield
+    for name, warn in save_warnings.items():
+        mod = sys.modules[name]
+        if mod:
+            setattr(mod, warn_name, warn)
+            if warn is None:
+                delattr(mod, warn_name)
+
+@contextmanager
+def suppress_warnings():
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        yield
+
+def check_warnings():
+    for name, mod in sys.modules.items():
+        if mod:
+            reg = getattr(mod, warn_name, None)
+            if reg:
+                # XXX We need to filter warnings for Python 2.
+                # This should be avoided by renaming the duplicate folders.
+                for k in reg:
+                    if type(k) is tuple and re.match(ignore_re, k[0]):
+                        continue
+                    return True
+    return False
+
+def warn(message, category=None, stacklevel=2):
+    """Issue a warning with the default 'RuntimeWarning'"""
+    if category is None:
+        category = UserWarning
+    warnings.warn(message, category, stacklevel)
+
+
+def linux_distribution():
+    """Returns the Linux distribution"""
+    # We have to be more specific because we had differences between
+    # RHEL 6.6 and RHEL 7.4 .
+    # Note: The platform module is deprecated. We need to switch to the
+    # distro package, ASAP! The distro has been extracted from Python,
+    # because it changes more often than the Python version.
+    distribution = []
+    try:
+        import distro
+        distribution = distro.linux_distribution()
+    except ImportError:
+        # platform.linux_distribution() was removed in 3.8
+        if sys.version_info[:2] < (3, 8):
+            import platform
+            distribution = platform.linux_distribution()
+    if distribution:
+        return "".join(distribution[:2]).lower()
+    warnings.warn('Cannot determine Linux distribution, please install distro',
+                  UserWarning)
+    return ""
+
+
+# Python2 legacy: Correct 'linux2' to 'linux', recommended way.
+if sys.platform.startswith('linux'):
+    platform_name = linux_distribution()
+    # this currently happens on opensuse in 5.14:
+    if not platform_name:
+        # We intentionally crash when that last resort is also absent:
+        platform_name = os.environ["MACHTYPE"]
+    platform_name = re.sub('[^0-9a-z]', '_', platform_name)
+else:
+    platform_name = sys.platform
+# In the linux case, we need more information.
+
+is_py3 = sys.version_info[0] == 3
+is_ci = os.environ.get("QTEST_ENVIRONMENT", "") == "ci"
+
+def get_script_dir():
+    script_dir = os.path.normpath(os.path.dirname(__file__))
+    while "sources" not in os.listdir(script_dir):
+        script_dir = os.path.dirname(script_dir)
+    return script_dir
+
+def qt_version():
+    from PySide6.QtCore import __version__
+    return tuple(map(int, __version__.split(".")))
+
+# Format a registry file name for version.
+def _registry_filename(version, use_ci_module):
+    name = "exists_{}_{}_{}_{}{}.py".format(platform_name,
+        version[0], version[1], version[2], "_ci" if use_ci_module else "")
+    return os.path.join(os.path.dirname(__file__), name)
+
+# Return the expected registry file name.
+def get_refpath(use_ci_module=is_ci):
+    return _registry_filename(qt_version(), use_ci_module)
+
+# Return the registry file name, either that of the current
+# version or fall back to a previous patch release.
+def get_effective_refpath(use_ci_module=is_ci):
+    refpath = get_refpath(use_ci_module)
+    if os.path.exists(refpath):
+        return refpath
+    version = qt_version()
+    major, minor, patch = version[:3]
+    while patch >= 0:
+        file = _registry_filename((major, minor, patch), use_ci_module)
+        if os.path.exists(file):
+            return file
+        patch -= 1
+    return refpath
+
+# Import the CI version of the platform module
+def import_refmodule(use_ci_module=is_ci):
+    refpath = get_effective_refpath(use_ci_module)
+    modname = os.path.basename(os.path.splitext(refpath)[0])
+    return __import__(modname)
+
+# eof