diff --git a/src/corelib/kernel/qtimer.cpp b/src/corelib/kernel/qtimer.cpp
index 2aafcb4c473..785cf677818 100644
--- a/src/corelib/kernel/qtimer.cpp
+++ b/src/corelib/kernel/qtimer.cpp
@@ -440,7 +440,8 @@ void QTimer::singleShot(int msec, Qt::TimerType timerType, const QObject *receiv
                 return;
             }
             QByteArray methodName(member+1, bracketPosition - 1 - member); // extract method name
-            QMetaObject::invokeMethod(const_cast<QObject *>(receiver), methodName.constData(), Qt::QueuedConnection);
+            QMetaObject::invokeMethod(const_cast<QObject *>(receiver), methodName.trimmed().constData(),
+                                      Qt::QueuedConnection);
             return;
         }
         (void) new QSingleShotTimer(msec, timerType, receiver, member);
diff --git a/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp b/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp
index b4f7aa5bd8d..3e6954355a8 100644
--- a/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp
+++ b/tests/auto/corelib/kernel/qtimer/tst_qtimer.cpp
@@ -32,6 +32,12 @@ private slots:
     void zeroTimer();
     void singleShotTimeout();
     void timeout();
+    void singleShotNormalizes_data();
+    void singleShotNormalizes();
+    void sequentialTimers_data();
+    void sequentialTimers();
+    void singleShotSequentialTimers_data();
+    void singleShotSequentialTimers();
     void remainingTime();
     void remainingTimeInitial_data();
     void remainingTimeInitial();
@@ -120,6 +126,142 @@ void tst_QTimer::timeout()
     QTRY_VERIFY_WITH_TIMEOUT(timeoutSpy.size() > oldCount, TIMEOUT_TIMEOUT);
 }
 
+void tst_QTimer::singleShotNormalizes_data()
+{
+    QTest::addColumn<QByteArray>("slotName");
+
+    QTest::newRow("normalized") << QByteArray(SLOT(exitLoop()));
+
+    QTest::newRow("space-before") << QByteArray(SLOT( exitLoop()));
+    QTest::newRow("space-after") << QByteArray(SLOT(exitLoop ()));
+    QTest::newRow("space-around") << QByteArray(SLOT( exitLoop ()));
+    QTest::newRow("spaces-before") << QByteArray(SLOT(  exitLoop()));
+    QTest::newRow("spaces-after") << QByteArray(SLOT(exitLoop  ()));
+    QTest::newRow("spaces-around") << QByteArray(SLOT(  exitLoop  ()));
+
+    QTest::newRow("space-in-parens") << QByteArray(SLOT(exitLoop( )));
+    QTest::newRow("spaces-in-parens") << QByteArray(SLOT(exitLoop(  )));
+    QTest::newRow("space-after-parens") << QByteArray(SLOT(exitLoop() ));
+    QTest::newRow("spaces-after-parens") << QByteArray(SLOT(exitLoop()  ));
+}
+
+void tst_QTimer::singleShotNormalizes()
+{
+    using namespace std::chrono_literals;
+    static constexpr auto TestTimeout = 250ms;
+    QFETCH(QByteArray, slotName);
+    QEventLoop loop;
+
+    // control test: regular connection
+    {
+        QTimer timer;
+        QVERIFY(QObject::connect(&timer, SIGNAL(timeout()), &QTestEventLoop::instance(), slotName));
+        timer.setSingleShot(true);
+        timer.start(1);
+        QTestEventLoop::instance().enterLoop(TestTimeout);
+        QVERIFY(!QTestEventLoop::instance().timeout());
+    }
+
+    // non-zero time
+    QTimer::singleShot(1, &QTestEventLoop::instance(), slotName);
+    QTestEventLoop::instance().enterLoop(TestTimeout);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+
+    QTimer::singleShot(1ms, &QTestEventLoop::instance(), slotName);
+    QTestEventLoop::instance().enterLoop(TestTimeout);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+
+    // zero time
+    QTimer::singleShot(0, &QTestEventLoop::instance(), slotName);
+    QTestEventLoop::instance().enterLoop(TestTimeout);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+
+    QTimer::singleShot(0ms, &QTestEventLoop::instance(), slotName);
+    QTestEventLoop::instance().enterLoop(TestTimeout);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+}
+
+void tst_QTimer::sequentialTimers_data()
+{
+#ifdef Q_OS_WIN
+    QSKIP("The API used by QEventDispatcherWin32 doesn't respect the order");
+#endif
+    QTest::addColumn<QList<int>>("timeouts");
+    auto addRow = [](const QList<int> &l) {
+        QByteArray name;
+        int last = -1;
+        for (int i = 0; i < l.size(); ++i) {
+            Q_ASSERT_X(l[i] >= last, "tst_QTimer", "input list must be sorted");
+            name += QByteArray::number(l[i]) + ',';
+        }
+        name.chop(1);
+        QTest::addRow("%s", name.constData()) << l;
+    };
+    // PreciseTimers
+    addRow({0, 0, 0, 0, 0, 0});
+    addRow({0, 1, 2});
+    addRow({1, 1, 1, 2, 2, 2, 2});
+    addRow({1, 2, 3});
+    addRow({19, 19, 19});
+    // CoarseTimer for setInterval
+    addRow({20, 20, 20, 20, 20});
+    addRow({25, 25, 25, 25, 25, 25, 50});
+}
+
+void tst_QTimer::sequentialTimers()
+{
+    QFETCH(const QList<int>, timeouts);
+    QByteArray result, expected;
+    std::vector<std::unique_ptr<QTimer>> timers;
+    expected.resize(timeouts.size());
+    result.reserve(timeouts.size());
+    timers.reserve(timeouts.size());
+    for (int i = 0; i < timeouts.size(); ++i) {
+        auto timer = std::make_unique<QTimer>();
+        timer->setSingleShot(true);
+        timer->setInterval(timeouts[i]);
+
+        char c = 'A' + i;
+        expected[i] = c;
+        QObject::connect(timer.get(), &QTimer::timeout, this, [&result, c = c]() {
+            result.append(c);
+        });
+        timers.push_back(std::move(timer));
+    }
+
+    // start the timers
+    for (auto &timer : timers)
+        timer->start();
+
+    QTestEventLoop::instance().enterLoopMSecs(timeouts.last() * 2 + 10);
+
+    QCOMPARE(result, expected);
+}
+
+void tst_QTimer::singleShotSequentialTimers_data()
+{
+    sequentialTimers_data();
+}
+
+void tst_QTimer::singleShotSequentialTimers()
+{
+    QFETCH(const QList<int>, timeouts);
+    QByteArray result, expected;
+    expected.resize(timeouts.size());
+    result.reserve(timeouts.size());
+    for (int i = 0; i < timeouts.size(); ++i) {
+        char c = 'A' + i;
+        expected[i] = c;
+        QTimer::singleShot(timeouts[i], this, [&result, c = c]() {
+            result.append(c);
+        });
+    }
+
+    QTestEventLoop::instance().enterLoopMSecs(timeouts.last() * 2 + 10);
+
+    QCOMPARE(result, expected);
+}
+
 void tst_QTimer::remainingTime()
 {
     QTimer tested;