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diff --git a/tests/auto/shared/waitforsignal.h b/tests/auto/shared/waitforsignal.h
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef WAITFORSIGNAL_H
+#define WAITFORSIGNAL_H
+
+#include <QObject>
+#include <QTestEventLoop>
+
+#include <utility>
+
+// Implementation details of waitForSignal.
+namespace {
+    // Wraps a functor to set a flag and exit from event loop if called.
+    template <class SignalHandler>
+    struct waitForSignal_SignalHandlerWrapper {
+        waitForSignal_SignalHandlerWrapper(SignalHandler &&sh)
+            : signalHandler(std::forward<SignalHandler>(sh)) {}
+
+        template <class... Args>
+        void operator()(Args && ... args) {
+            signalHandler(std::forward<Args>(args)...);
+            hasBeenCalled = true;
+            loop.exitLoop();
+        }
+
+        SignalHandler &&signalHandler;
+        QTestEventLoop loop;
+        bool hasBeenCalled = false;
+    };
+
+    // No-op functor.
+    struct waitForSignal_DefaultSignalHandler {
+        template <class... Args>
+        void operator()(Args && ...) {}
+    };
+} // namespace
+
+// Wait for a signal to be emitted.
+//
+// The given functor is called with the signal arguments allowing the arguments
+// to be modified before returning from the signal handler (unlike QSignalSpy).
+template <class Sender, class Signal, class SignalHandler>
+bool waitForSignal(Sender &&sender, Signal &&signal, SignalHandler &&signalHandler, int timeout = 15000)
+{
+    waitForSignal_SignalHandlerWrapper<SignalHandler> signalHandlerWrapper(
+        std::forward<SignalHandler>(signalHandler));
+    auto connection = QObject::connect(
+        std::forward<Sender>(sender),
+        std::forward<Signal>(signal),
+        std::ref(signalHandlerWrapper));
+    signalHandlerWrapper.loop.enterLoopMSecs(timeout);
+    QObject::disconnect(connection);
+    return signalHandlerWrapper.hasBeenCalled;
+}
+
+template <class Sender, class Signal>
+bool waitForSignal(Sender &&sender, Signal &&signal, int timeout = 15000)
+{
+    return waitForSignal(std::forward<Sender>(sender),
+                         std::forward<Signal>(signal),
+                         waitForSignal_DefaultSignalHandler(),
+                         timeout);
+}
+
+#endif // !WAITFORSIGNAL_H