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diff --git a/tests/auto/core/common/testarbiter.h b/tests/auto/core/common/testarbiter.h
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+++ b/tests/auto/core/common/testarbiter.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <Qt3DCore/private/qchangearbiter_p.h>
+#include <Qt3DCore/private/qnode_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class TestArbiter : public Qt3DCore::QChangeArbiter
+{
+public:
+
+    void setArbiterOnNode(Qt3DCore::QNode *node)
+    {
+        Qt3DCore::QNodePrivate::get(node)->setArbiter(this);
+        const auto childNodes = node->childNodes();
+        for (Qt3DCore::QNode *n : childNodes)
+            setArbiterOnNode(n);
+    }
+
+    QVector<Qt3DCore::QNode *> dirtyNodes() const { return m_dirtyFrontEndNodes; }
+    QVector<Qt3DCore::ComponentRelationshipChange> dirtyComponents() const { return m_dirtyEntityComponentNodeChanges; }
+
+    void clear()
+    {
+        m_dirtyFrontEndNodes.clear();
+        m_dirtyEntityComponentNodeChanges.clear();
+    }
+};
+
+QT_END_NAMESPACE