diff --git a/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/CMakeLists.txt b/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/CMakeLists.txt
index fe7f87d183..6a212e6e63 100644
--- a/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/CMakeLists.txt
+++ b/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/CMakeLists.txt
@@ -16,6 +16,7 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR} # required for gtest-all.cpp
 set(PROJECT_FILES
     cafUserInterface_UnitTests.cpp
     cafPdmUiTreeViewModelTest.cpp
+    cafPdmUiTreeViewEditorTest.cpp
     cafPdmUiTreeSelectionQModelTest.cpp
     cafPdmUiTableViewQModelTest.cpp
     cafPdmUiNumberFormatTest.cpp
diff --git a/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/cafPdmUiTreeViewEditorTest.cpp b/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/cafPdmUiTreeViewEditorTest.cpp
new file mode 100644
index 0000000000..bcd60eb0a7
--- /dev/null
+++ b/Fwk/AppFwk/cafUserInterface/cafUserInterface_UnitTests/cafPdmUiTreeViewEditorTest.cpp
@@ -0,0 +1,214 @@
+
+#include "gtest/gtest.h"
+
+#include "cafPdmChildArrayField.h"
+#include "cafPdmObject.h"
+#include "cafPdmUiTreeViewEditor.h"
+
+#include <QModelIndex>
+#include <QTreeView>
+#include <QWidget>
+
+using namespace caf;
+
+namespace PdmUiTreeViewEditorTestNs
+{
+class SimpleObj : public caf::PdmObject
+{
+    CAF_PDM_HEADER_INIT;
+
+public:
+    SimpleObj()
+        : PdmObject()
+    {
+        CAF_PDM_InitObject( "SimpleObj", "", "Tooltip SimpleObj", "WhatsThis SimpleObj" );
+    }
+    ~SimpleObj() {}
+};
+// Registered under a unique keyword: the object factory keys on this string regardless of C++
+// namespace, and cafPdmUiTreeViewModelTest.cpp already registers "SimpleObj"/"DemoPdmObject".
+CAF_PDM_SOURCE_INIT( SimpleObj, "TreeViewEditorTest_SimpleObj" );
+
+class DemoPdmObject : public caf::PdmObject
+{
+    CAF_PDM_HEADER_INIT;
+
+public:
+    DemoPdmObject()
+    {
+        CAF_PDM_InitObject( "DemoPdmObject", "", "Tooltip DemoPdmObject", "WhatsThis DemoPdmObject" );
+
+        CAF_PDM_InitFieldNoDefault( &m_simpleObjPtrField, "SimpleObjPtrField", "SimpleObjPtrField", "", "Tooltip", "WhatsThis" );
+        m_simpleObjPtrField.uiCapability()->setUiTreeHidden( false );
+    }
+
+    caf::PdmChildArrayField<caf::PdmObjectHandle*> m_simpleObjPtrField;
+};
+
+CAF_PDM_SOURCE_INIT( DemoPdmObject, "TreeViewEditorTest_DemoPdmObject" );
+} // namespace PdmUiTreeViewEditorTestNs
+
+using namespace PdmUiTreeViewEditorTestNs;
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+TEST( PdmUiTreeViewEditorTest, CreateWidgetAndVerifyEmptyState )
+{
+    PdmUiTreeViewEditor editor;
+
+    QWidget* widget = editor.getOrCreateWidget( nullptr );
+    ASSERT_TRUE( widget != nullptr );
+    ASSERT_TRUE( editor.treeView() != nullptr );
+
+    // No item is bound yet, so no valid model index should be found
+    SimpleObj   obj;
+    QModelIndex mi = editor.findModelIndex( &obj );
+    EXPECT_FALSE( mi.isValid() );
+
+    delete widget;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+TEST( PdmUiTreeViewEditorTest, SetPdmItemRootAndFindModelIndex )
+{
+    SimpleObj* obj1 = new SimpleObj;
+    SimpleObj* obj2 = new SimpleObj;
+
+    DemoPdmObject* demoObj = new DemoPdmObject;
+    demoObj->m_simpleObjPtrField.push_back( obj1 );
+    demoObj->m_simpleObjPtrField.push_back( obj2 );
+
+    PdmUiTreeViewEditor editor;
+    editor.getOrCreateWidget( nullptr );
+
+    editor.setPdmItemRoot( demoObj );
+    editor.updateUi( "" );
+
+    QModelIndex mi1 = editor.findModelIndex( obj1 );
+    EXPECT_TRUE( mi1.isValid() );
+
+    QModelIndex mi2 = editor.findModelIndex( obj2 );
+    EXPECT_TRUE( mi2.isValid() );
+
+    EXPECT_EQ( obj1, dynamic_cast<PdmObjectHandle*>( editor.uiItemFromModelIndex( mi1 ) ) );
+    EXPECT_EQ( obj2, dynamic_cast<PdmObjectHandle*>( editor.uiItemFromModelIndex( mi2 ) ) );
+
+    delete demoObj;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+TEST( PdmUiTreeViewEditorTest, DeleteItemAndVerifyModelIndexInvalidated )
+{
+    SimpleObj* obj1 = new SimpleObj;
+    SimpleObj* obj2 = new SimpleObj;
+
+    DemoPdmObject* demoObj = new DemoPdmObject;
+    demoObj->m_simpleObjPtrField.push_back( obj1 );
+    demoObj->m_simpleObjPtrField.push_back( obj2 );
+
+    PdmUiTreeViewEditor editor;
+    editor.getOrCreateWidget( nullptr );
+    editor.setPdmItemRoot( demoObj );
+    editor.updateUi( "" );
+
+    QModelIndex mi = editor.findModelIndex( obj1 );
+    EXPECT_TRUE( mi.isValid() );
+
+    demoObj->m_simpleObjPtrField.removeChild( obj1 );
+    demoObj->m_simpleObjPtrField().uiCapability()->updateConnectedEditors();
+
+    mi = editor.findModelIndex( obj1 );
+    EXPECT_FALSE( mi.isValid() );
+
+    delete obj1;
+    delete demoObj;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+TEST( PdmUiTreeViewEditorTest, SelectAsCurrentItemAndVerifySelection )
+{
+    SimpleObj* obj1 = new SimpleObj;
+    SimpleObj* obj2 = new SimpleObj;
+
+    DemoPdmObject* demoObj = new DemoPdmObject;
+    demoObj->m_simpleObjPtrField.push_back( obj1 );
+    demoObj->m_simpleObjPtrField.push_back( obj2 );
+
+    PdmUiTreeViewEditor editor;
+    editor.getOrCreateWidget( nullptr );
+    editor.setPdmItemRoot( demoObj );
+    editor.updateUi( "" );
+
+    editor.selectAsCurrentItem( obj2 );
+
+    std::vector<PdmUiItem*> selectedItems;
+    editor.selectedUiItems( selectedItems );
+
+    ASSERT_EQ( size_t( 1 ), selectedItems.size() );
+    EXPECT_EQ( obj2, dynamic_cast<PdmObjectHandle*>( selectedItems[0] ) );
+
+    delete demoObj;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+TEST( PdmUiTreeViewEditorTest, SetExpandedDoesNotCrashForValidAndInvalidItems )
+{
+    SimpleObj* obj1 = new SimpleObj;
+
+    DemoPdmObject* demoObj = new DemoPdmObject;
+    demoObj->m_simpleObjPtrField.push_back( obj1 );
+
+    PdmUiTreeViewEditor editor;
+    editor.getOrCreateWidget( nullptr );
+    editor.setPdmItemRoot( demoObj );
+    editor.updateUi( "" );
+
+    // Should not crash for a valid item
+    editor.setExpanded( demoObj, true );
+    editor.setExpanded( demoObj, false );
+
+    // Should not crash for an item not present in the tree
+    SimpleObj detachedObj;
+    editor.setExpanded( &detachedObj, true );
+
+    delete demoObj;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// The tree view widget can be destroyed by Qt while the editor is still reachable, for instance
+/// during teardown of the parent widget. All accessors must then be no-ops instead of crashing.
+/// https://github.com/OPM/ResInsight/issues/14699
+//--------------------------------------------------------------------------------------------------
+TEST( PdmUiTreeViewEditorTest, AccessorsAreNoOpsAfterWidgetIsDestroyed )
+{
+    SimpleObj* obj1 = new SimpleObj;
+
+    DemoPdmObject* demoObj = new DemoPdmObject;
+    demoObj->m_simpleObjPtrField.push_back( obj1 );
+
+    PdmUiTreeViewEditor editor;
+    QWidget*            widget = editor.getOrCreateWidget( nullptr );
+    editor.setPdmItemRoot( demoObj );
+    editor.updateUi( "" );
+
+    EXPECT_TRUE( editor.findModelIndex( obj1 ).isValid() );
+
+    delete widget;
+    EXPECT_TRUE( editor.treeView() == nullptr );
+
+    // The models outlive the widget, so these must be no-ops rather than crashes
+    editor.selectAsCurrentItem( obj1 );
+    editor.selectItems( { obj1 } );
+    editor.setExpanded( obj1, true );
+
+    delete demoObj;
+}