diff --git a/tests/dbus_smoketest.cpp b/tests/dbus_smoketest.cpp
index b3aaaa6..c45e92c 100644
--- a/tests/dbus_smoketest.cpp
+++ b/tests/dbus_smoketest.cpp
@@ -79,6 +79,7 @@ private Q_SLOTS:
     void cleanupTestCase();
 
     void pingGameCenter();
+    void gameCenterUniqueness();
     void pingRunner();
     void pingInput();
     void runnerResolveLaunchNative();
@@ -243,6 +244,34 @@ void DbusSmokeTest::pingGameCenter()
     QCOMPARE(reply.value(), QStringLiteral("ok"));
 }
 
+void DbusSmokeTest::gameCenterUniqueness()
+{
+    pingGameCenter();
+
+    QVERIFY(m_bus.interface());
+    const QDBusReply<QString> ownerBeforeReply = m_bus.interface()->serviceOwner(QStringLiteral("org.kde.GameCenter1"));
+    QVERIFY(ownerBeforeReply.isValid());
+    const QString ownerBefore = ownerBeforeReply.value();
+    QVERIFY(!ownerBefore.isEmpty());
+
+    QProcess second;
+    startDaemon(second, m_gamecenterPath);
+    QVERIFY(second.waitForStarted(5000));
+
+    const bool finished = second.waitForFinished(5000);
+    if (!finished) {
+        stopProcess(second);
+    }
+    QVERIFY(finished);
+    QCOMPARE(second.exitStatus(), QProcess::NormalExit);
+
+    const QDBusReply<QString> ownerAfterReply = m_bus.interface()->serviceOwner(QStringLiteral("org.kde.GameCenter1"));
+    QVERIFY(ownerAfterReply.isValid());
+    QCOMPARE(ownerAfterReply.value(), ownerBefore);
+
+    pingGameCenter();
+}
+
 void DbusSmokeTest::pingRunner()
 {
     QDBusInterface iface(QStringLiteral("org.kde.ALaKarte.Runner1"),