diff --git a/tests/graphicssignalplotterbenchmark.cpp b/tests/graphicssignalplotterbenchmark.cpp
--- a/tests/graphicssignalplotterbenchmark.cpp
+++ b/tests/graphicssignalplotterbenchmark.cpp
@@ -1,6 +1,7 @@
 #include "graphicssignalplotterbenchmark.h"
 #include "signalplotter/kgraphicssignalplotter.h"
 
+#include <QRandomGenerator>
 #include <QtTestGui>
 #include <QGraphicsView>
 #include <QGraphicsScene>
@@ -31,8 +32,10 @@
     s->setMaxAxisTextWidth(5);
     QVERIFY(QTest::qWaitForWindowExposed(view));
 
+    auto *generator = QRandomGenerator::global();
+
     QBENCHMARK {
-        s->addSample(QList<qreal>() << qrand()%10 << qrand()%10 << qrand()%10 << qrand()%10);
+        s->addSample(QList<qreal>() << generator->bounded(10) << generator->bounded(10) << generator->bounded(10) << generator->bounded(10));
         qApp->processEvents();
     }
 
@@ -44,9 +47,10 @@
     s->addBeam(Qt::green);
     s->addBeam(Qt::red);
     s->addBeam(Qt::yellow);
+    auto *generator = QRandomGenerator::global();
 
     QBENCHMARK {
-        s->addSample(QList<qreal>() << qrand()%10 << qrand()%10 << qrand()%10 << qrand()%10);
+        s->addSample(QList<qreal>() << generator->bounded(10) << generator->bounded(10) << generator->bounded(10) << generator->bounded(10));
         qApp->processEvents();
     }
 
diff --git a/tests/signalplotterbenchmark.cpp b/tests/signalplotterbenchmark.cpp
--- a/tests/signalplotterbenchmark.cpp
+++ b/tests/signalplotterbenchmark.cpp
@@ -1,6 +1,7 @@
 #include "signalplotterbenchmark.h"
 #include "signalplotter/ksignalplotter.h"
 
+#include <QRandomGenerator>
 #include <QtTestGui>
 #include <QtGui>
 #include <limits>
@@ -25,8 +26,9 @@
     s->resize(1000,500);
     QVERIFY(QTest::qWaitForWindowExposed(s));
 
+    auto *generator = QRandomGenerator::global();
     QBENCHMARK {
-        s->addSample(QList<qreal>() << qrand()%10 << qrand()%10 << qrand()%10 << qrand()%10);
+        s->addSample(QList<qreal>() << generator->bounded(10) << generator->bounded(10) << generator->bounded(10) << generator->bounded(10));
         qApp->processEvents();
     }
 
@@ -43,8 +45,9 @@
     s->resize(1000,500);
     QVERIFY(QTest::qWaitForWindowExposed(s));
 
+    auto *generator = QRandomGenerator::global();
     QBENCHMARK {
-        s->addSample(QList<qreal>() << qrand()%10 << qrand()%10 << qrand()%10 << qrand()%10);
+        s->addSample(QList<qreal>() << generator->bounded(10) << generator->bounded(10) << generator->bounded(10) << generator->bounded(10));
         qApp->processEvents();
     }
 
@@ -56,8 +59,9 @@
     s->addBeam(Qt::red);
     s->addBeam(Qt::yellow);
 
+    auto *generator = QRandomGenerator::global();
     QBENCHMARK {
-        s->addSample(QList<qreal>() << qrand()%10 << qrand()%10 << qrand()%10 << qrand()%10);
+        s->addSample(QList<qreal>() << generator->bounded(10) << generator->bounded(10) << generator->bounded(10) << generator->bounded(10));
         qApp->processEvents();
     }