diff --git a/src/plugins/perfprofiler/perfconfigeventsmodel.cpp b/src/plugins/perfprofiler/perfconfigeventsmodel.cpp
index 304adfa4a52..d6876b4774b 100644
--- a/src/plugins/perfprofiler/perfconfigeventsmodel.cpp
+++ b/src/plugins/perfprofiler/perfconfigeventsmodel.cpp
@@ -355,7 +355,7 @@ PerfConfigEventsModel::EventDescription PerfConfigEventsModel::parseEvent(
 
     if (event.startsWith('r') && event.length() == 4) {
         bool ok = false;
-        const uint eventNumber = event.midRef(1).toUInt(&ok, 16);
+        const uint eventNumber = QStringView{event}.mid(1).toUInt(&ok, 16);
         if (ok) {
             description.eventType = EventTypeRaw;
             description.numericEvent = eventNumber;
diff --git a/src/plugins/perfprofiler/perftimelinemodel.cpp b/src/plugins/perfprofiler/perftimelinemodel.cpp
index 234338ffe38..44083eea18e 100644
--- a/src/plugins/perfprofiler/perftimelinemodel.cpp
+++ b/src/plugins/perfprofiler/perftimelinemodel.cpp
@@ -179,8 +179,8 @@ QVariantMap PerfTimelineModel::details(int index) const
             result.insert(tr("Name"), orUnknown(manager->string(tracePoint.name)));
             const QHash<qint32, QVariant> &extraData = m_extraData[index];
             for (auto it = extraData.constBegin(), end = extraData.constEnd(); it != end; ++it) {
-                result.insertMulti(QString::fromUtf8(manager->string(it.key())),
-                                   prettyPrintTraceData(it.value()));
+                result.insert(QString::fromUtf8(manager->string(it.key())),
+                              prettyPrintTraceData(it.value()));
             }
         }
         if (!m_resourceBlocks.isEmpty()) {
diff --git a/src/plugins/perfprofiler/tests/perfresourcecounter_test.cpp b/src/plugins/perfprofiler/tests/perfresourcecounter_test.cpp
index f48d6aec45c..fc44c0e60f5 100644
--- a/src/plugins/perfprofiler/tests/perfresourcecounter_test.cpp
+++ b/src/plugins/perfprofiler/tests/perfresourcecounter_test.cpp
@@ -112,19 +112,20 @@ void PerfResourceCounterTest::testMallocFree()
 
 void PerfResourceCounterTest::testRandomFill()
 {
+    auto rg = QRandomGenerator::global();
     for (int i = 0; i < 100; ++i) {
         SizeCounter::Container container;
         SizeCounter counter(&container);
         for (int i = 0; i < 10000; ++i) {
-            const int amount = qrand();
+            const int amount = rg->generate();
             counter.request(amount, i);
-            counter.obtain(qrand());
+            counter.obtain(rg->generate());
             if (sum(container) != counter.currentTotal())
                 qDebug() << "ouch";
             QCOMPARE(sum(container), counter.currentTotal());
         }
         for (int i = 0; i < 10000; ++i) {
-            counter.release(qrand());
+            counter.release(rg->generate());
             QCOMPARE(sum(container), counter.currentTotal());
         }
 
@@ -138,9 +139,10 @@ void PerfResourceCounterTest::testUnitSized()
     NoPayloadCounter::Container container;
     NoPayloadCounter counter(&container);
     QList<int> ids;
+    auto rg = QRandomGenerator::global();
     for (int i = 0; i < 10000; ++i) {
         counter.request(1);
-        const int id = qrand();
+        const int id = rg->generate();
         counter.obtain(id);
         if (id != 0) // Otherwise it's the invalid ID and that means the allocation "failed".
             ids.append(id);
@@ -158,11 +160,12 @@ void PerfResourceCounterTest::testRandomAlternate()
 {
     NoPayloadCounter::Container container;
     NoPayloadCounter counter(&container);
+    auto rg = QRandomGenerator::global();
     for (int i = 0; i < 1000; ++i) {
         for (int i = 0; i < 100; ++i) {
-            counter.request(qrand());
-            counter.obtain(qrand());
-            counter.release(qrand());
+            counter.request(rg->generate());
+            counter.obtain(rg->generate());
+            counter.release(rg->generate());
         }
         QCOMPARE(sum(container), counter.currentTotal());
     }