diff --git a/src/widgets/quickselectdialog.cpp b/src/widgets/quickselectdialog.cpp
--- a/src/widgets/quickselectdialog.cpp
+++ b/src/widgets/quickselectdialog.cpp
@@ -48,7 +48,6 @@
     setWindowTitle(i18n("Quick Select Dialog"));
 
     m_label->setText(i18n("You can start typing to filter the list of available pages"));
-    m_filterProxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
     m_filterProxyModel->setRecursiveFilteringEnabled(true);
 
     m_tree->setModel(m_filterProxyModel);
@@ -90,7 +89,7 @@
     else
         m_label->setText(i18n("Path: %1", textFilter));
 
-    m_filterProxyModel->setFilterRegularExpression(QRegularExpression::escape(textFilter));
+    m_filterProxyModel->setFilterRegularExpression(QRegularExpression(textFilter, QRegularExpression::CaseInsensitiveOption));
     m_tree->expandAll();
 }
 
diff --git a/tests/units/presentation/taskfilterproxymodeltest.cpp b/tests/units/presentation/taskfilterproxymodeltest.cpp
--- a/tests/units/presentation/taskfilterproxymodeltest.cpp
+++ b/tests/units/presentation/taskfilterproxymodeltest.cpp
@@ -83,7 +83,8 @@
         output.setSourceModel(&input);
 
         // WHEN
-        output.setFilterRegularExpression(QStringLiteral("find me"));
+        output.setFilterRegularExpression(
+            QRegularExpression(QStringLiteral("find me"), QRegularExpression::CaseInsensitiveOption));
 
         // THEN
         QCOMPARE(output.rowCount(), 2);
@@ -139,7 +140,8 @@
         output.setSourceModel(&input);
 
         // WHEN
-        output.setFilterRegularExpression(QStringLiteral("find me"));
+        output.setFilterRegularExpression(
+            QRegularExpression(QStringLiteral("find me"), QRegularExpression::CaseInsensitiveOption));
 
         // THEN
         QCOMPARE(output.rowCount(), 2);
diff --git a/tests/units/widgets/pageviewtest.cpp b/tests/units/widgets/pageviewtest.cpp
--- a/tests/units/widgets/pageviewtest.cpp
+++ b/tests/units/widgets/pageviewtest.cpp
@@ -637,7 +637,8 @@
 
         QSortFilterProxyModel proxyModel;
         stubPageModel.setProxyModel(&proxyModel);
-        proxyModel.setFilterRegularExpression(QStringLiteral("B"));
+        proxyModel.setFilterRegularExpression(
+            QRegularExpression(QStringLiteral("B"), QRegularExpression::CaseInsensitiveOption));
 
         QPersistentModelIndex index = stubPageModel.centralListModel()->index(0, 0);
         QCOMPARE(index.data().toString(), QLatin1String("B"));