diff --git a/kpa-thumbnailtool/main.cpp b/kpa-thumbnailtool/main.cpp
index 9167e52a..ccc0689e 100644
--- a/kpa-thumbnailtool/main.cpp
+++ b/kpa-thumbnailtool/main.cpp
@@ -1,100 +1,103 @@
 /* Copyright (C) 2020 The KPhotoAlbum development team
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 #include "version.h"
 
 #include <ImageManager/ThumbnailCache.h>
 #include <Settings/SettingsData.h>
 
 #include <KAboutData>
 #include <KConfigGroup>
 #include <KLocalizedString>
 #include <KSharedConfig>
 #include <QCommandLineOption>
 #include <QCommandLineParser>
 #include <QCoreApplication>
 #include <QDebug>
 #include <QDir>
 #include <QLocale>
 #include <QLoggingCategory>
+#include <QTimer>
 
 Q_DECLARE_LOGGING_CATEGORY(MainLog)
 Q_LOGGING_CATEGORY(MainLog, "kphotoalbum.thumbnailtool", QtWarningMsg)
 
 int main(int argc, char **argv)
 {
     KLocalizedString::setApplicationDomain("kphotoalbum");
     QCoreApplication app(argc, argv);
 
     KAboutData aboutData(
         QStringLiteral("kpa-thumbnailtool"), //component name
         i18n("KPhotoAlbum Thumbnail Tool"), // display name
         QStringLiteral(KPA_VERSION),
         i18n("Tool for inspecting and editing the KPhotoAlbum thumbnail cache"), // short description
         KAboutLicense::GPL,
         i18n("Copyright (C) 2020 The KPhotoAlbum Development Team"), // copyright statement
         QString(), // other text
         QStringLiteral("https://www.kphotoalbum.org") // homepage
     );
     aboutData.setOrganizationDomain("kde.org");
     // maintainer is expected to be the first entry
     // Note: I like to sort by name, grouped by active/inactive;
     //       Jesper gets ranked with the active authors for obvious reasons
     aboutData.addAuthor(i18n("Johannes Zarl-Zierl"), i18n("Development, Maintainer"), QStringLiteral("johannes@zarl-zierl.at"));
     aboutData.addAuthor(i18n("Robert Krawitz"), i18n("Development, Optimization"), QStringLiteral("rlk@alum.mit.edu"));
     aboutData.addAuthor(i18n("Tobias Leupold"), i18n("Development, Releases, Website"), QStringLiteral("tobias.leupold@gmx.de"));
     aboutData.addAuthor(i18n("Jesper K. Pedersen"), i18n("Former Maintainer, Project Creator"), QStringLiteral("blackie@kde.org"));
     // not currently active:
     aboutData.addAuthor(i18n("Hassan Ibraheem"), QString(), QStringLiteral("hasan.ibraheem@gmail.com"));
     aboutData.addAuthor(i18n("Jan Kundr&aacute;t"), QString(), QStringLiteral("jkt@gentoo.org"));
     aboutData.addAuthor(i18n("Andreas Neustifter"), QString(), QStringLiteral("andreas.neustifter@gmail.com"));
     aboutData.addAuthor(i18n("Tuomas Suutari"), QString(), QStringLiteral("thsuut@utu.fi"));
     aboutData.addAuthor(i18n("Miika Turkia"), QString(), QStringLiteral("miika.turkia@gmail.com"));
     aboutData.addAuthor(i18n("Henner Zeller"), QString(), QStringLiteral("h.zeller@acm.org"));
 
     // initialize the commandline parser
     QCommandLineParser parser;
     parser.addHelpOption();
     parser.addVersionOption();
     parser.addPositionalArgument(QString::fromUtf8("imageDir"), i18n("The directory containing the .thumbnail directory."));
 
     KAboutData::setApplicationData(aboutData);
     aboutData.setupCommandLine(&parser);
 
     parser.process(app);
     aboutData.processCommandLine(&parser);
 
     const auto args = parser.positionalArguments();
     if (args.empty()) {
         qWarning("Missing argument!");
         return 1;
     }
     const auto imageDir = QDir { args.first() };
     if (!imageDir.exists()) {
         qWarning("Not a directory!");
         return 1;
     }
     DB::DummyUIDelegate uiDelegate;
     Settings::SettingsData::setup(imageDir.path(), uiDelegate);
     const auto thumbnailDir = imageDir.absoluteFilePath(ImageManager::defaultThumbnailDirectory());
     const ImageManager::ThumbnailCache cache { thumbnailDir };
     qDebug() << "Thumbnail storage size:" << cache.thumbnailSize();
 
+    // immediately quit the event loop:
+    QTimer::singleShot(0, &app, &QCoreApplication::quit);
     return QCoreApplication::exec();
 }
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