diff --git a/tests/test_core/test_core_project.py b/tests/test_core/test_core_project.py
index df0638fd..4f71b787 100644
--- a/tests/test_core/test_core_project.py
+++ b/tests/test_core/test_core_project.py
@@ -26,7 +26,7 @@ from shutil import copyfile
 from zipfile import ZipFile
 from lxml import etree
 
-from tools import cmpFiles, writeFile, readFile, buildTestProject
+from tools import cmpFiles, writeFile, readFile, buildTestProject, XML_IGNORE
 from mock import causeOSError
 
 from novelwriter.core.project import NWProject
@@ -67,7 +67,7 @@ def testCoreProject_NewMinimal(fncDir, outDir, refDir, mockGUI, mockRnd):
     assert theProject.saveProject() is True
     assert theProject.closeProject() is True
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
     assert theProject.projChanged is False
 
     # Open a second time
@@ -77,7 +77,7 @@ def testCoreProject_NewMinimal(fncDir, outDir, refDir, mockGUI, mockRnd):
     assert theProject.saveProject() is True
     assert theProject.closeProject() is True
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
 
 # END Test testCoreProject_NewMinimal
 
@@ -115,7 +115,7 @@ def testCoreProject_NewCustomA(fncDir, outDir, refDir, mockGUI, mockRnd):
     assert theProject.closeProject() is True
 
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
 
 # END Test testCoreProject_NewCustomA
 
@@ -153,7 +153,7 @@ def testCoreProject_NewCustomB(fncDir, outDir, refDir, mockGUI, mockRnd):
     assert theProject.closeProject() is True
 
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
 
 # END Test testCoreProject_NewCustomB
 
@@ -273,7 +273,7 @@ def testCoreProject_NewRoot(fncDir, outDir, refDir, mockGUI, mockRnd):
     assert theProject.closeProject() is True
 
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
     assert theProject.projChanged is False
 
 # END Test testCoreProject_NewRoot
@@ -302,7 +302,7 @@ def testCoreProject_NewFile(fncDir, outDir, refDir, mockGUI, mockRnd):
     assert theProject.closeProject() is True
 
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
     assert theProject.projChanged is False
 
 # END Test testCoreProject_NewFile
@@ -483,7 +483,7 @@ def testCoreProject_Save(monkeypatch, nwMinimal, mockGUI, refDir):
     assert theProject.saveProject() is True
     assert theProject.saveCount == saveCount + 1
     assert theProject.autoCount == autoCount
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8, 9])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
 
     # Check that a second save creates a .bak file
     assert os.path.isfile(backFile) is True
@@ -494,7 +494,7 @@ def testCoreProject_Save(monkeypatch, nwMinimal, mockGUI, refDir):
     assert theProject.saveProject(autoSave=True) is True
     assert theProject.saveCount == saveCount
     assert theProject.autoCount == autoCount + 1
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8, 9])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
 
     # Close test project
     assert theProject.closeProject()
diff --git a/tests/test_gui/test_gui_guimain.py b/tests/test_gui/test_gui_guimain.py
index 04d43d7f..a52e486e 100644
--- a/tests/test_gui/test_gui_guimain.py
+++ b/tests/test_gui/test_gui_guimain.py
@@ -23,7 +23,7 @@ import os
 import pytest
 
 from shutil import copyfile
-from tools import cmpFiles, buildTestProject
+from tools import cmpFiles, buildTestProject, XML_IGNORE
 
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QMessageBox, QDialog
@@ -158,7 +158,7 @@ def testGuiMain_Editing(qtbot, monkeypatch, nwGUI, fncProj, refDir, outDir, mock
     testFile = os.path.join(outDir, "guiEditor_Main_Initial_nwProject.nwx")
     compFile = os.path.join(refDir, "guiEditor_Main_Initial_nwProject.nwx")
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
     qtbot.wait(stepDelay)
 
     # qtbot.stopForInteraction()
@@ -436,7 +436,7 @@ def testGuiMain_Editing(qtbot, monkeypatch, nwGUI, fncProj, refDir, outDir, mock
     testFile = os.path.join(outDir, "guiEditor_Main_Final_nwProject.nwx")
     compFile = os.path.join(refDir, "guiEditor_Main_Final_nwProject.nwx")
     copyfile(projFile, testFile)
-    assert cmpFiles(testFile, compFile, [2, 6, 7, 8])
+    assert cmpFiles(testFile, compFile, ignoreStart=XML_IGNORE)
 
     projFile = os.path.join(fncProj, "content", "000000000000f.nwd")
     testFile = os.path.join(outDir, "guiEditor_Main_Final_000000000000f.nwd")
diff --git a/tests/tools.py b/tests/tools.py
index a8e2c774..bfdb5140 100644
--- a/tests/tools.py
+++ b/tests/tools.py
@@ -25,6 +25,8 @@ import shutil
 
 from PyQt5.QtWidgets import qApp
 
+XML_IGNORE = ("<novelWriterXML", "<saveCount", "<autoCount", "<editTime")
+
 
 def cmpFiles(fileOne, fileTwo, ignoreLines=None, ignoreStart=None):
     """Compare two files, but optionally ignore lines given by a list.