diff --git a/src/plugins/helloworld/helloworldplugin.cpp b/src/plugins/helloworld/helloworldplugin.cpp
index 8487e1b0763..c2e431508b5 100644
--- a/src/plugins/helloworld/helloworldplugin.cpp
+++ b/src/plugins/helloworld/helloworldplugin.cpp
@@ -94,7 +94,7 @@ bool HelloWorldPlugin::initialize(const QStringList &arguments, QString *errorMe
     Core::Context context("HelloWorld.MainView");
 
     // Create an action to be triggered by a menu entry
-    QAction *helloWorldAction = new QAction(tr("Say \"&Hello World!\""), this);
+    auto helloWorldAction = new QAction(tr("Say \"&Hello World!\""), this);
     connect(helloWorldAction, &QAction::triggered, this, &HelloWorldPlugin::sayHelloWorld);
 
     // Register the action with the action manager
@@ -140,10 +140,10 @@ void HelloWorldPlugin::extensionsInitialized()
 
 void HelloWorldPlugin::sayHelloWorld()
 {
-    // When passing 0 for the parent, the message box becomes an
+    // When passing nullptr for the parent, the message box becomes an
     // application-global modal dialog box
     QMessageBox::information(
-            0, tr("Hello World!"), tr("Hello World! Beautiful day today, isn't it?"));
+            nullptr, tr("Hello World!"), tr("Hello World! Beautiful day today, isn't it?"));
 }
 
 } // namespace Internal
diff --git a/src/plugins/helloworld/helloworldplugin.h b/src/plugins/helloworld/helloworldplugin.h
index 8546f4cf566..b03642f8805 100644
--- a/src/plugins/helloworld/helloworldplugin.h
+++ b/src/plugins/helloworld/helloworldplugin.h
@@ -40,11 +40,11 @@ class HelloWorldPlugin
 
 public:
     HelloWorldPlugin();
-    ~HelloWorldPlugin();
+    ~HelloWorldPlugin() override;
 
-    bool initialize(const QStringList &arguments, QString *errorMessage);
+    bool initialize(const QStringList &arguments, QString *errorMessage) override;
 
-    void extensionsInitialized();
+    void extensionsInitialized() override;
 
 private:
     void sayHelloWorld();
diff --git a/src/plugins/helloworld/helloworldwindow.cpp b/src/plugins/helloworld/helloworldwindow.cpp
index 0a54a46768a..be59474d9a1 100644
--- a/src/plugins/helloworld/helloworldwindow.cpp
+++ b/src/plugins/helloworld/helloworldwindow.cpp
@@ -33,7 +33,7 @@ using namespace HelloWorld::Internal;
 HelloWorldWindow::HelloWorldWindow(QWidget *parent)
    : QWidget(parent)
 {
-    QBoxLayout *layout = new QVBoxLayout(this);
+    auto layout = new QVBoxLayout(this);
     layout->addWidget(new QTextEdit(tr("Focus me to activate my context!")));
     setWindowTitle(tr("Hello, world!"));
 }
diff --git a/src/plugins/helloworld/helloworldwindow.h b/src/plugins/helloworld/helloworldwindow.h
index 382dac8f22b..7fda68f5743 100644
--- a/src/plugins/helloworld/helloworldwindow.h
+++ b/src/plugins/helloworld/helloworldwindow.h
@@ -35,7 +35,7 @@ class HelloWorldWindow : public QWidget
     Q_OBJECT
 
 public:
-    HelloWorldWindow(QWidget *parent = 0);
+    explicit HelloWorldWindow(QWidget *parent = nullptr);
 };
 
 } // namespace Internal