4 files changed, 4 insertions, 4 deletions
diff --git a/tests/manual/cocoa/appicon/main.cpp b/tests/manual/cocoa/appicon/main.cpp
index e22d70988d..ba398703b7 100644
--- a/tests/manual/cocoa/appicon/main.cpp
+++ b/tests/manual/cocoa/appicon/main.cpp
@@ -34,7 +34,7 @@ class TopWidget : public QWidget
 {
     Q_OBJECT
 public:
-    TopWidget(QWidget *parent = 0) : QWidget(parent)
+    TopWidget(QWidget *parent = nullptr) : QWidget(parent)
     {
         QVBoxLayout *layout = new QVBoxLayout;
         QPushButton *button = new QPushButton("Change app icon");
diff --git a/tests/manual/cocoa/menurama/mainwindow.h b/tests/manual/cocoa/menurama/mainwindow.h
index 3ca90dad8f..e2af43e04e 100644
--- a/tests/manual/cocoa/menurama/mainwindow.h
+++ b/tests/manual/cocoa/menurama/mainwindow.h
@@ -40,7 +40,7 @@ class MainWindow : public QMainWindow
     Q_OBJECT
 
 public:
-    explicit MainWindow(QWidget *parent = 0);
+    explicit MainWindow(QWidget *parent = nullptr);
     ~MainWindow();
 
 protected:
diff --git a/tests/manual/cocoa/qt_on_cocoa/rasterwindow.h b/tests/manual/cocoa/qt_on_cocoa/rasterwindow.h
index 5262300b12..b8ef674994 100644
--- a/tests/manual/cocoa/qt_on_cocoa/rasterwindow.h
+++ b/tests/manual/cocoa/qt_on_cocoa/rasterwindow.h
@@ -32,7 +32,7 @@
 class RasterWindow : public QRasterWindow
 {
 public:
-    RasterWindow(QRasterWindow *parent = 0);
+    RasterWindow(QRasterWindow *parent = nullptr);
 
 protected:
     void mousePressEvent(QMouseEvent *);
diff --git a/tests/manual/cocoa/wheelevent/window.h b/tests/manual/cocoa/wheelevent/window.h
index 122b40de69..42a6b4a1aa 100644
--- a/tests/manual/cocoa/wheelevent/window.h
+++ b/tests/manual/cocoa/wheelevent/window.h
@@ -32,7 +32,7 @@
 class Window : public QWindow
 {
 public:
-    Window(QWindow *parent = 0);
+    Window(QWindow *parent = nullptr);
     Window(QScreen *screen);
 
 protected: