diff --git a/autotests/klinkitemselectionmodeltest.cpp b/autotests/klinkitemselectionmodeltest.cpp
index 1399700..8e32d06 100644
--- a/autotests/klinkitemselectionmodeltest.cpp
+++ b/autotests/klinkitemselectionmodeltest.cpp
@@ -108,7 +108,6 @@ void KLinkItemSelectionModelTest::testSubSetCurrent()
 
 void KLinkItemSelectionModelTest::testChangeModel()
 {
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
     QVERIFY(m_mainSelectionModel->selection().isEmpty());
 
     {
@@ -130,12 +129,10 @@ void KLinkItemSelectionModelTest::testChangeModel()
 
     QVERIFY(m_mainSelectionModel->selection().isEmpty());
     QVERIFY(m_subSelectionModel->selection().isEmpty());
-#endif
 }
 
 void KLinkItemSelectionModelTest::testChangeModelOfExternal()
 {
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
     QVERIFY(m_mainSelectionModel->selection().isEmpty());
 
     {
@@ -157,7 +154,6 @@ void KLinkItemSelectionModelTest::testChangeModelOfExternal()
 
     QVERIFY(m_mainSelectionModel->selection().isEmpty());
     QVERIFY(m_subSelectionModel->selection().isEmpty());
-#endif
 }
 
 void KLinkItemSelectionModelTest::testChangeLinkedSelectionModel()
@@ -190,7 +186,6 @@ void KLinkItemSelectionModelTest::testChangeLinkedSelectionModel()
 
 void KLinkItemSelectionModelTest::testAdditionalLink()
 {
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
     {
     auto idx = m_mainModel->index(6, 0);
     m_mainSelectionModel->select(idx, QItemSelectionModel::Select);
@@ -229,7 +224,6 @@ void KLinkItemSelectionModelTest::testAdditionalLink()
     QVERIFY(!m_subSelectionModel->selection().isEmpty());
     QCOMPARE(m_mainSelectionModel->selection().indexes().first().row(), 7);
     QCOMPARE(m_subSelectionModel->selection().indexes().first().row(), 2);
-#endif
 }
 
 void KLinkItemSelectionModelTest::testClearSelection()
diff --git a/autotests/kselectionproxymodeltest.cpp b/autotests/kselectionproxymodeltest.cpp
index fbc26d8..483e7c4 100644
--- a/autotests/kselectionproxymodeltest.cpp
+++ b/autotests/kselectionproxymodeltest.cpp
@@ -54,11 +54,9 @@ private Q_SLOTS:
   void removeRows_data();
   void removeRows();
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
   void selectionModelModelChange();
   void deselection_data();
   void deselection();
-#endif
 
 private:
   const QStringList days;
@@ -122,7 +120,6 @@ void KSelectionProxyModelTest::selectOnSourceReset()
   QVERIFY(selectionModel.selection().contains(strings.index(2, 0)));
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
 void KSelectionProxyModelTest::selectionModelModelChange()
 {
   QStringListModel strings(days);
@@ -382,8 +379,6 @@ void KSelectionProxyModelTest::deselection()
     QCOMPARE(proxy.rowCount(), expectedRowCountAfter);
 }
 
-#endif
-
 void KSelectionProxyModelTest::removeRows_data()
 {
   QTest::addColumn<int>("kspm_mode");
@@ -842,11 +837,7 @@ void KSelectionProxyModelTest::removeRows()
                 );
     resetCommand.doCommand();
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
     QItemSelectionModel selectionModel;
-#else
-    QItemSelectionModel selectionModel(&tree);
-#endif
 
     if (emulateSingleSelectionMode)
     {
@@ -866,19 +857,13 @@ void KSelectionProxyModelTest::removeRows()
     proxy.setFilterBehavior(static_cast<KSelectionProxyModel::FilterBehavior>(kspm_mode));
 
     if (connectSelectionModelFirst) {
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
         selectionModel.setModel(&tree);
-#endif
         proxy.setSourceModel(&tree);
         proxy.setSelectionModel(&selectionModel);
     } else {
         proxy.setSourceModel(&tree);
         proxy.setSelectionModel(&selectionModel);
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
         selectionModel.setModel(&tree);
-#else
-        QSKIP("No QItemSelectionModel::setModel in Qt 5.4", SkipSingle);
-#endif
     }
 
     QSignalSpy beforeSpy(&proxy, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)));
diff --git a/src/klinkitemselectionmodel.cpp b/src/klinkitemselectionmodel.cpp
index f6de1c1..ad8a108 100644
--- a/src/klinkitemselectionmodel.cpp
+++ b/src/klinkitemselectionmodel.cpp
@@ -40,11 +40,9 @@ public:
         QObject::connect(q_ptr, &QItemSelectionModel::currentChanged, q_ptr,
             [this](const QModelIndex& idx) { slotCurrentChanged(idx); } );
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
         QObject::connect(q_ptr, &QItemSelectionModel::modelChanged, q_ptr, [this] {
             reinitializeIndexMapper();
         });
-#endif
     }
 
     Q_DECLARE_PUBLIC(KLinkItemSelectionModel)
@@ -126,11 +124,9 @@ void KLinkItemSelectionModel::setLinkedItemSelectionModel(QItemSelectionModel *s
             connect(d->m_linkedItemSelectionModel, SIGNAL(selectionChanged(QItemSelection,QItemSelection)), SLOT(sourceSelectionChanged(QItemSelection,QItemSelection)));
             connect(d->m_linkedItemSelectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)), SLOT(sourceCurrentChanged(QModelIndex)));
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
             connect(d->m_linkedItemSelectionModel, &QItemSelectionModel::modelChanged, this, [this] {
                 d_ptr->reinitializeIndexMapper();
             });
-#endif
         }
         d->reinitializeIndexMapper();
         Q_EMIT linkedItemSelectionModelChanged();
diff --git a/src/kselectionproxymodel.cpp b/src/kselectionproxymodel.cpp
index 4ee510f..0f57c70 100644
--- a/src/kselectionproxymodel.cpp
+++ b/src/kselectionproxymodel.cpp
@@ -2407,10 +2407,8 @@ void KSelectionProxyModel::setSelectionModel(QItemSelectionModel *itemSelectionM
                 }
                 endResetModel();
             };
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
             connect(d->m_selectionModel.data(), &QItemSelectionModel::modelChanged,
                     this, handleSelectionModelModel);
-#endif
             handleSelectionModelModel();
         }