diff --git a/novelwriter/gui/docviewerpanel.py b/novelwriter/gui/docviewerpanel.py
index f5078df9..5f4f4cc6 100644
--- a/novelwriter/gui/docviewerpanel.py
+++ b/novelwriter/gui/docviewerpanel.py
@@ -164,8 +164,9 @@ class GuiDocViewerPanel(QWidget):
 
     def _updateTabVisibility(self) -> None:
         """Hide class tabs with no content."""
-        for tClass, cTab in self.kwTabs.items():
-            self.mainTabs.setTabVisible(self.idTabs[tClass], cTab.countEntries() > 0)
+        if CONFIG.verQtValue >= 0x050f00:
+            for tClass, cTab in self.kwTabs.items():
+                self.mainTabs.setTabVisible(self.idTabs[tClass], cTab.countEntries() > 0)
         return
 
 # END Class GuiDocViewerPanel
diff --git a/tests/requirements.txt b/tests/requirements.txt
index 0bc71a68..7314a844 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,4 +1,4 @@
-pytest>=4.0.0
+pytest>=6.0.0
 pytest-timeout
 pytest-cov
 pytest-qt
diff --git a/tests/test_gui/test_gui_docviewerpanel.py b/tests/test_gui/test_gui_docviewerpanel.py
index e9f96ada..cff00ccf 100644
--- a/tests/test_gui/test_gui_docviewerpanel.py
+++ b/tests/test_gui/test_gui_docviewerpanel.py
@@ -23,7 +23,7 @@ import pytest
 
 from tools import C, buildTestProject
 
-from novelwriter import SHARED
+from novelwriter import CONFIG, SHARED
 from novelwriter.constants import nwLists
 from novelwriter.dialogs.editlabel import GuiEditLabel
 
@@ -134,13 +134,14 @@ def testGuiViewerPanel_Tags(qtbot, monkeypatch, caplog, nwGUI, projPath, mockRnd
     nwGUI.docEditor._processTag(cursor, create=True)
 
     # Check Panel Tab Visibility
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["CHARACTER"]) is True
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["PLOT"]) is False
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["WORLD"]) is False
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["TIMELINE"]) is False
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["OBJECT"]) is False
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["ENTITY"]) is False
-    assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["CUSTOM"]) is False
+    if CONFIG.verQtValue >= 0x050f00:
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["CHARACTER"]) is True
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["PLOT"]) is False
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["WORLD"]) is False
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["TIMELINE"]) is False
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["OBJECT"]) is False
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["ENTITY"]) is False
+        assert viewPanel.mainTabs.isTabVisible(viewPanel.idTabs["CUSTOM"]) is False
 
     # Check Character Tab
     charTab = viewPanel.kwTabs["CHARACTER"]