diff --git a/util/locale_database/testlocales/localemodel.cpp b/util/locale_database/testlocales/localemodel.cpp
index 7d3c5cfa755..7f0150c7e09 100644
--- a/util/locale_database/testlocales/localemodel.cpp
+++ b/util/locale_database/testlocales/localemodel.cpp
@@ -680,7 +680,7 @@ LocaleModel::LocaleModel(QObject *parent)
 QVariant LocaleModel::data(const QModelIndex &index, int role) const
 {
     if (!index.isValid()
-        || role != Qt::DisplayRole && role != Qt::EditRole && role != Qt::ToolTipRole
+        || (role != Qt::DisplayRole && role != Qt::EditRole && role != Qt::ToolTipRole)
         || index.column() >= g_model_cols
         || index.row() >= g_locale_list_count + 2)
         return QVariant();
@@ -821,9 +821,9 @@ int LocaleModel::rowCount(const QModelIndex &parent) const
 Qt::ItemFlags LocaleModel::flags(const QModelIndex &index) const
 {
     if (!index.isValid())
-        return 0;
+        return {};
     if (index.row() == 0 && index.column() == g_model_cols - 1)
-        return 0;
+        return {};
     if (index.row() == 0)
         return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
     return QAbstractItemModel::flags(index);
@@ -835,7 +835,7 @@ bool LocaleModel::setData(const QModelIndex &index, const QVariant &value, int r
         || index.row() != 0
         || index.column() >= g_model_cols - 1
         || role != Qt::EditRole
-        || m_data_list.at(index.column()).type() != value.type())
+        || m_data_list.at(index.column()).typeId() != value.typeId())
         return false;
 
     m_data_list[index.column()] = value;
diff --git a/util/locale_database/testlocales/localemodel.h b/util/locale_database/testlocales/localemodel.h
index 666ea8493d2..a0ba45bb156 100644
--- a/util/locale_database/testlocales/localemodel.h
+++ b/util/locale_database/testlocales/localemodel.h
@@ -13,17 +13,17 @@ class LocaleModel : public QAbstractItemModel
 public:
     LocaleModel(QObject *parent = nullptr);
 
-    virtual int columnCount(const QModelIndex &parent = QModelIndex()) const;
-    virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
-    virtual QModelIndex index(int row, int column,
-                                const QModelIndex &parent = QModelIndex()) const;
-    virtual QModelIndex parent(const QModelIndex &index) const;
-    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
-    virtual QVariant headerData(int section, Qt::Orientation orientation,
-                                int role = Qt::DisplayRole ) const;
-    virtual Qt::ItemFlags flags(const QModelIndex &index) const;
-    virtual bool setData(const QModelIndex &index, const QVariant &value,
-                            int role = Qt::EditRole);
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QModelIndex index(int row, int column,
+                      const QModelIndex &parent = QModelIndex()) const override;
+    QModelIndex parent(const QModelIndex &index) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant headerData(int section, Qt::Orientation orientation,
+                        int role = Qt::DisplayRole ) const override;
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
+    bool setData(const QModelIndex &index, const QVariant &value,
+                 int role = Qt::EditRole) override;
 private:
     QList<QVariant> m_data_list;
 };
diff --git a/util/locale_database/testlocales/localewidget.cpp b/util/locale_database/testlocales/localewidget.cpp
index c35c3dc1d8b..df8a3c28abe 100644
--- a/util/locale_database/testlocales/localewidget.cpp
+++ b/util/locale_database/testlocales/localewidget.cpp
@@ -26,26 +26,26 @@ public:
 class EditorFactory : public QItemEditorFactory
 {
 public:
-    EditorFactory() {
-        static DoubleEditorCreator double_editor_creator;
-        registerEditor(QVariant::Double, &double_editor_creator);
+    EditorFactory()
+    {
+        // registerEditor() assumes ownership of the creator.
+        registerEditor(QVariant::Double, new DoubleEditorCreator);
     }
 };
 
 LocaleWidget::LocaleWidget(QWidget *parent)
-    : QWidget(parent)
+    : QWidget(parent),
+      m_model(new LocaleModel(this)),
+      m_view(new QTableView(this))
 {
-    m_model = new LocaleModel(this);
-    m_view = new QTableView(this);
-
     QStyledItemDelegate *delegate = qobject_cast<QStyledItemDelegate*>(m_view->itemDelegate());
     Q_ASSERT(delegate != 0);
-    static EditorFactory editor_factory;
-    delegate->setItemEditorFactory(&editor_factory);
+    static EditorFactory editorFactory;
+    delegate->setItemEditorFactory(&editorFactory);
 
     m_view->setModel(m_model);
 
     QVBoxLayout *layout = new QVBoxLayout(this);
-    layout->setMargin(0);
+    layout->setContentsMargins(0, 0, 0, 0);
     layout->addWidget(m_view);
 }
diff --git a/util/locale_database/testlocales/testlocales.pro b/util/locale_database/testlocales/testlocales.pro
index a9a6247f967..126c19589bb 100644
--- a/util/locale_database/testlocales/testlocales.pro
+++ b/util/locale_database/testlocales/testlocales.pro
@@ -1,4 +1,5 @@
 TARGET = testlocales
 CONFIG += debug
+QT += widgets
 SOURCES += localemodel.cpp  localewidget.cpp  main.cpp
-HEADERS += localemodel.h  localewidget.h
\ No newline at end of file
+HEADERS += localemodel.h  localewidget.h