diff --git a/novelwriter/core/coretools.py b/novelwriter/core/coretools.py
index 379e050f..7e161f02 100644
--- a/novelwriter/core/coretools.py
+++ b/novelwriter/core/coretools.py
@@ -344,7 +344,7 @@ class ProjectBuilder:
             logger.error("No project path set for the new project")
             return False
 
-        project = NWProject(self.mainGui)
+        project = NWProject()
         if not project.storage.openProjectInPlace(projPath, newProject=True):
             return False
 
diff --git a/novelwriter/core/project.py b/novelwriter/core/project.py
index fd5e0b0a..4b427721 100644
--- a/novelwriter/core/project.py
+++ b/novelwriter/core/project.py
@@ -33,8 +33,8 @@ from functools import partial
 
 from PyQt5.QtCore import QCoreApplication, QObject, pyqtSignal
 
-from novelwriter import CONFIG, __version__, __hexversion__
-from novelwriter.enum import nwItemType, nwItemClass, nwItemLayout, nwAlert
+from novelwriter import CONFIG, SHARED, __version__, __hexversion__
+from novelwriter.enum import nwItemType, nwItemClass, nwItemLayout
 from novelwriter.error import logException
 from novelwriter.constants import trConst, nwLabels
 from novelwriter.core.tree import NWTree
@@ -49,7 +49,6 @@ from novelwriter.common import (
 )
 
 if TYPE_CHECKING:  # pragma: no cover
-    from novelwriter.guimain import GuiMain
     from novelwriter.core.item import NWItem
     from novelwriter.core.status import NWStatus
 
@@ -61,11 +60,8 @@ class NWProject(QObject):
     statusChanged = pyqtSignal(bool)
     statusMessage = pyqtSignal(str)
 
-    def __init__(self, mainGui: GuiMain) -> None:
-        super().__init__(parent=mainGui)
-
-        # Internal
-        self.mainGui = mainGui
+    def __init__(self, parent: QObject | None = None) -> None:
+        super().__init__(parent=parent)
 
         # Core Elements
         self._options = OptionState(self)    # Project-specific GUI options
@@ -197,9 +193,9 @@ class NWProject(QObject):
         if self._tree.checkType(tHandle, nwItemType.FILE):
             delDoc = self._storage.getDocument(tHandle)
             if not delDoc.deleteDocument():
-                self.mainGui.makeAlert(
+                SHARED.error(
                     self.tr("Could not delete document file."),
-                    info=delDoc.getError(), level=nwAlert.ERROR
+                    info=delDoc.getError()
                 )
                 return False
 
@@ -228,9 +224,7 @@ class NWProject(QObject):
         """
         logger.info("Opening project: %s", projPath)
         if not self._storage.openProjectInPlace(projPath):
-            self.mainGui.makeAlert(self.tr(
-                "Could not open project with path: {0}"
-            ).format(projPath), level=nwAlert.ERROR)
+            SHARED.error(self.tr("Could not open project with path: {0}").format(projPath))
             return False
 
         # Project Lock
@@ -262,26 +256,24 @@ class NWProject(QObject):
 
         if not xmlParsed:
             if xmlReader.state == XMLReadState.NOT_NWX_FILE:
-                self.mainGui.makeAlert(self.tr(
+                SHARED.error(self.tr(
                     "Project file does not appear to be a novelWriterXML file."
-                ), level=nwAlert.ERROR)
+                ))
             elif xmlReader.state == XMLReadState.UNKNOWN_VERSION:
-                self.mainGui.makeAlert(self.tr(
+                SHARED.error(self.tr(
                     "Unknown or unsupported novelWriter project file format. "
                     "The project cannot be opened by this version of novelWriter. "
                     "The file was saved with novelWriter version {0}."
-                ).format(appVersion), level=nwAlert.ERROR)
+                ).format(appVersion))
             else:
-                self.mainGui.makeAlert(self.tr(
-                    "Failed to parse project xml."
-                ), level=nwAlert.ERROR)
+                SHARED.error(self.tr("Failed to parse project xml."))
             return False
 
         # Check Legacy Upgrade
         # ====================
 
         if xmlReader.state == XMLReadState.WAS_LEGACY:
-            msgYes = self.mainGui.askQuestion(self.tr(
+            msgYes = SHARED.question(self.tr(
                 "The file format of your project is about to be updated. "
                 "If you proceed, older versions of novelWriter will no "
                 "longer be able to open this project. Continue?"
@@ -293,13 +285,13 @@ class NWProject(QObject):
         # =========================
 
         if xmlReader.hexVersion > hexToInt(__hexversion__):
-            msgYes = self.mainGui.askQuestion(self.tr(
+            msgYes = SHARED.question(self.tr(
                 "This project was saved by a newer version of "
                 "novelWriter, version {0}. This is version {1}. If you "
                 "continue to open the project, some attributes and "
                 "settings may not be preserved, but the overall project "
                 "should be fine. Continue opening the project?"
-            ).format(appVersion, __version__))
+            ).format(appVersion, __version__), warn=True)
             if not msgYes:
                 return False
 
@@ -321,9 +313,9 @@ class NWProject(QObject):
         # This also handles any orphaned files found
         orphans, recovered = self._tree.checkConsistency(self.tr("Recovered"))
         if orphans > 0:
-            self.mainGui.makeAlert(self.tr(
+            SHARED.warn(self.tr(
                 "Found {0} orphaned file(s) in the project. {1} file(s) were recovered."
-            ).format(orphans, recovered), level=nwAlert.WARN)
+            ).format(orphans, recovered))
 
         self._index.loadIndex()
         if xmlReader.state == XMLReadState.WAS_LEGACY:
@@ -347,9 +339,7 @@ class NWProject(QObject):
         file.
         """
         if not self._storage.isOpen():
-            self.mainGui.makeAlert(self.tr(
-                "There is no project open."
-            ), level=nwAlert.ERROR)
+            SHARED.error(self.tr("There is no project open."))
             return False
 
         saveTime = time()
@@ -372,9 +362,7 @@ class NWProject(QObject):
         editTime = self._data.editTime + max(round(saveTime - self._session.start), 0)
         content = self._tree.pack()
         if not xmlWriter.write(self._data, content, saveTime, editTime):
-            self.mainGui.makeAlert(self.tr(
-                "Failed to save project."
-            ), level=nwAlert.ERROR, exc=xmlWriter.error)
+            SHARED.error(self.tr("Failed to save project."), exc=xmlWriter.error)
             return False
 
         # Save other project data
@@ -415,10 +403,10 @@ class NWProject(QObject):
         self.statusMessage.emit(self.tr("Backing up project ..."))
 
         if not self._data.name:
-            self.mainGui.makeAlert(self.tr(
+            SHARED.error(self.tr(
                 "Cannot backup project because no project name is set. "
                 "Please set a Project Name in Project Settings."
-            ), level=nwAlert.ERROR)
+            ))
             return False
 
         cleanName = makeFileNameSafe(self._data.name)
@@ -427,9 +415,7 @@ class NWProject(QObject):
         try:
             baseDir.mkdir(exist_ok=True, parents=True)
         except Exception as exc:
-            self.mainGui.makeAlert(self.tr(
-                "Could not create backup folder."
-            ), level=nwAlert.ERROR, exc=exc)
+            SHARED.error(self.tr("Could not create backup folder."), exc=exc)
             return False
 
         timeStamp = formatTimeStamp(time(), fileSafe=True)
@@ -437,14 +423,12 @@ class NWProject(QObject):
         if self._storage.zipIt(archName, compression=2):
             size = formatInt(archName.stat().st_size)
             if doNotify:
-                self.mainGui.makeAlert(
+                SHARED.info(
                     self.tr("Created a backup of your project of size {0}B.").format(size),
                     info=self.tr("Path: {0}").format(str(backupPath))
                 )
         else:
-            self.mainGui.makeAlert(self.tr(
-                "Could not write backup archive."
-            ), level=nwAlert.ERROR)
+            SHARED.error(self.tr("Could not write backup archive."))
             return False
 
         self.statusMessage.emit(self.tr("Project backed up to '{0}'").format(str(archName)))
diff --git a/novelwriter/shared.py b/novelwriter/shared.py
index 8ad3e3f3..4df3d24e 100644
--- a/novelwriter/shared.py
+++ b/novelwriter/shared.py
@@ -29,6 +29,7 @@ from typing import TYPE_CHECKING
 from pathlib import Path
 
 from PyQt5.QtCore import QObject, pyqtSignal, pyqtSlot
+from PyQt5.QtWidgets import QMessageBox, QWidget
 
 if TYPE_CHECKING:  # pragma: no cover
     from novelwriter.guimain import GuiMain
@@ -49,6 +50,7 @@ class SharedData(QObject):
         self._theme = None
         self._project = None
         self._lockedBy = None
+        self._alert = None
         return
 
     @property
@@ -74,12 +76,19 @@ class SharedData(QObject):
 
     @property
     def hasProject(self) -> bool:
+        """Return True of the project instance is populated."""
         return self.project.isValid
 
     @property
     def projectLock(self) -> list | None:
+        """Return cached lock information for the last project."""
         return self._lockedBy
 
+    @property
+    def alert(self) -> _GuiAlert | None:
+        """Return a pointer to the last alert box."""
+        return self._alert
+
     ##
     #  Methods
     ##
@@ -127,6 +136,48 @@ class SharedData(QObject):
         """Remove the project lock."""
         return self.project.storage.clearLockFile()
 
+    ##
+    #  Alert Boxes
+    ##
+
+    def info(self, text: str, info: str = "", details: str = "") -> None:
+        """Open an information alert box."""
+        self._alert = _GuiAlert(self.mainGui, self.theme)
+        self._alert.setMessage(text, info, details)
+        self._alert.setAlertType(_GuiAlert.INFO, False)
+        logger.info(self._alert.logMessage, stacklevel=2)
+        self._alert.exec_()
+        return
+
+    def warn(self, text: str, info: str = "", details: str = "") -> None:
+        """Open a warning alert box."""
+        self._alert = _GuiAlert(self.mainGui, self.theme)
+        self._alert.setMessage(text, info, details)
+        self._alert.setAlertType(_GuiAlert.WARN, False)
+        logger.warning(self._alert.logMessage, stacklevel=2)
+        self._alert.exec_()
+        return
+
+    def error(self, text: str, info: str = "", details: str = "",
+              exc: Exception | None = None) -> None:
+        """Open an error alert box."""
+        self._alert = _GuiAlert(self.mainGui, self.theme)
+        self._alert.setMessage(text, info, details)
+        self._alert.setAlertType(_GuiAlert.ERROR, False)
+        if exc:
+            self._alert.setException(exc)
+        logger.error(self._alert.logMessage, stacklevel=2)
+        self._alert.exec_()
+        return
+
+    def question(self, text: str, info: str = "", details: str = "", warn: bool = False) -> bool:
+        """Open an error alert box."""
+        self._alert = _GuiAlert(self.mainGui, self.theme)
+        self._alert.setMessage(text, info, details)
+        self._alert.setAlertType(_GuiAlert.ERROR, True)
+        self._alert.exec_()
+        return self._alert.result() == QMessageBox.Yes
+
     ##
     #  Internal Slots
     ##
@@ -154,9 +205,67 @@ class SharedData(QObject):
             self._project.statusChanged.disconnect()
             self._project.statusMessage.disconnect()
             self._project.deleteLater()
-        self._project = NWProject(self.mainGui)
+        self._project = NWProject(self)
         self._project.statusChanged.connect(self._emitProjectStatusChange)
         self._project.statusMessage.connect(self._emitProjectStatusMeesage)
         return
 
 # END Class SharedData
+
+
+class _GuiAlert(QMessageBox):
+
+    INFO = 0
+    WARN = 1
+    ERROR = 2
+    ASK = 3
+
+    def __init__(self, parent: QWidget, theme: GuiTheme) -> None:
+        super().__init__(parent=parent)
+        self._theme = theme
+        self._message = ""
+        return
+
+    @property
+    def logMessage(self) -> str:
+        return self._message
+
+    def setMessage(self, text: str, info: str, details: str) -> None:
+        """Set the alert box message."""
+        self._message = " ".join(filter(None, [text, info, details]))
+        self.setText(text)
+        self.setInformativeText(info)
+        self.setDetailedText(details)
+        return
+
+    def setException(self, exception: Exception) -> None:
+        """Add exception details."""
+        info = self.informativeText()
+        text = f"<b>{type(exception).__name__}</b>: {str(exception)}"
+        self.setInformativeText(f"{info}<br>{text}" if info else text)
+        return
+
+    def setAlertType(self, level: int, isYesNo: bool) -> None:
+        """Set the type of alert and whether the dialog should have
+        Yes/No buttons or just an Ok button.
+        """
+        if isYesNo:
+            self.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
+        else:
+            self.setStandardButtons(QMessageBox.Ok)
+        pSz = 2*self._theme.baseIconSize
+        if level == self.INFO:
+            self.setIconPixmap(self._theme.getPixmap("alert_info", (pSz, pSz)))
+            self.setWindowTitle(self.tr("Information"))
+        elif level == self.WARN:
+            self.setIconPixmap(self._theme.getPixmap("alert_warn", (pSz, pSz)))
+            self.setWindowTitle(self.tr("Warning"))
+        elif level == self.ERROR:
+            self.setIconPixmap(self._theme.getPixmap("alert_error", (pSz, pSz)))
+            self.setWindowTitle(self.tr("Error"))
+        elif level == self.ASK:
+            self.setIconPixmap(self._theme.getPixmap("alert_question", (pSz, pSz)))
+            self.setWindowTitle(self.tr("Question"))
+        return
+
+# END Class _GuiAlert
diff --git a/tests/conftest.py b/tests/conftest.py
index 42d0afb4..a21551a8 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -25,14 +25,14 @@ import shutil
 
 from pathlib import Path
 
-from mocked import MockGuiMain
 from tools import cleanProject
+from mocked import MockGuiMain, MockTheme
 
 from PyQt5.QtWidgets import QMessageBox
 
 sys.path.insert(1, str(Path(__file__).parent.parent.absolute()))
 
-from novelwriter import CONFIG, main  # noqa: E402
+from novelwriter import CONFIG, SHARED, main  # noqa: E402
 
 _TST_ROOT = Path(__file__).parent
 _TMP_ROOT = _TST_ROOT / "temp"
@@ -136,10 +136,15 @@ def projPath(fncPath):
 
 
 @pytest.fixture(scope="function")
-def mockGUI():
+def mockGUI(qtbot, monkeypatch):
     """Create a mock instance of novelWriter's main GUI class."""
-    theGui = MockGuiMain()
-    return theGui
+    monkeypatch.setattr(QMessageBox, "exec_", lambda *a: None)
+    monkeypatch.setattr(QMessageBox, "result", lambda *a: QMessageBox.Yes)
+    gui = MockGuiMain()
+    theme = MockTheme()
+    monkeypatch.setattr(SHARED, "_gui", gui)
+    monkeypatch.setattr(SHARED, "_theme", theme)
+    return gui
 
 
 @pytest.fixture(scope="function")
diff --git a/tests/mocked.py b/tests/mocked.py
index 3c748236..0960138f 100644
--- a/tests/mocked.py
+++ b/tests/mocked.py
@@ -19,14 +19,15 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-from PyQt5.QtCore import QObject
+from PyQt5.QtGui import QPixmap
+from PyQt5.QtWidgets import QWidget
 
 
 # =========================================================================== #
 #  Mock GUI
 # =========================================================================== #
 
-class MockGuiMain(QObject):
+class MockGuiMain(QWidget):
 
     def __init__(self):
         super().__init__()
@@ -98,6 +99,18 @@ class MockStatusBar:
 # END Class MockStatusBar
 
 
+class MockTheme:
+
+    def __init__(self):
+        self.baseIconSize = 10
+        return
+
+    def getPixmap(self, *a):
+        return QPixmap()
+
+# END Class MockTheme
+
+
 class MockApp:
 
     def __init__(self):
diff --git a/tests/test_core/test_core_buildsettings.py b/tests/test_core/test_core_buildsettings.py
index e809d6d1..505e9bef 100644
--- a/tests/test_core/test_core_buildsettings.py
+++ b/tests/test_core/test_core_buildsettings.py
@@ -220,7 +220,7 @@ def testCoreBuildSettings_BuildValues():
 @pytest.mark.core
 def testCoreBuildSettings_Filters(mockGUI, fncPath: Path, mockRnd):
     """Test filters for project items."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
     build = BuildSettings()
 
@@ -368,7 +368,7 @@ def testCoreBuildSettings_Filters(mockGUI, fncPath: Path, mockRnd):
 @pytest.mark.core
 def testCoreBuildSettings_Collection(monkeypatch, mockGUI, fncPath: Path, mockRnd):
     """Test the collections class for builds."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
     buildsFile = project.storage.getMetaFile(nwFiles.BUILDS_FILE)
     assert isinstance(buildsFile, Path)
diff --git a/tests/test_core/test_core_coretools.py b/tests/test_core/test_core_coretools.py
index 04aae086..765c2e08 100644
--- a/tests/test_core/test_core_coretools.py
+++ b/tests/test_core/test_core_coretools.py
@@ -38,7 +38,7 @@ from novelwriter.core.coretools import DocDuplicator, DocMerger, DocSplitter, Pr
 @pytest.mark.core
 def testCoreTools_DocMerger(monkeypatch, mockGUI, fncPath, tstPaths, mockRnd, ipsumText):
     """Test the DocMerger utility."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -126,7 +126,7 @@ def testCoreTools_DocMerger(monkeypatch, mockGUI, fncPath, tstPaths, mockRnd, ip
 @pytest.mark.core
 def testCoreTools_DocSplitter(monkeypatch, mockGUI, fncPath, mockRnd, ipsumText):
     """Test the DocSplitter utility."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -265,7 +265,7 @@ def testCoreTools_DocSplitter(monkeypatch, mockGUI, fncPath, mockRnd, ipsumText)
 @pytest.mark.core
 def testCoreTools_DocDuplicator(mockGUI, fncPath, tstPaths, mockRnd):
     """Test the DocDuplicator utility."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
diff --git a/tests/test_core/test_core_docbuild.py b/tests/test_core/test_core_docbuild.py
index 16e8941f..148b1651 100644
--- a/tests/test_core/test_core_docbuild.py
+++ b/tests/test_core/test_core_docbuild.py
@@ -76,7 +76,7 @@ BUILD_CONF = {
 @pytest.mark.core
 def testCoreDocBuild_OpenDocument(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths):
     """Test building an open document manuscript."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     project.openProject(prjLipsum)
 
     build = BuildSettings()
@@ -180,7 +180,7 @@ def testCoreDocBuild_OpenDocument(monkeypatch, mockGUI, prjLipsum, fncPath, tstP
 @pytest.mark.core
 def testCoreDocBuild_HTML(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths):
     """Test building an HTML manuscript."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     project.openProject(prjLipsum)
 
     build = BuildSettings()
@@ -250,7 +250,7 @@ def testCoreDocBuild_HTML(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths):
 @pytest.mark.core
 def testCoreDocBuild_Markdown(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths):
     """Test building an Markdown manuscript."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     project.openProject(prjLipsum)
 
     build = BuildSettings()
@@ -320,7 +320,7 @@ def testCoreDocBuild_Markdown(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths
 @pytest.mark.core
 def testCoreDocBuild_NWD(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths):
     """Test building a NWD manuscript."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     project.openProject(prjLipsum)
 
     build = BuildSettings()
@@ -390,7 +390,7 @@ def testCoreDocBuild_NWD(monkeypatch, mockGUI, prjLipsum, fncPath, tstPaths):
 @pytest.mark.core
 def testCoreDocBuild_Custom(mockGUI, fncPath: Path):
     """Test custom builds and some error handling."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
 
     build = BuildSettings()
@@ -455,7 +455,7 @@ def testCoreDocBuild_Custom(mockGUI, fncPath: Path):
 @pytest.mark.core
 def testCoreDocBuild_IterBuild(mockGUI, fncPath: Path, mockRnd):
     """Test iter build wrapper."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
     build = BuildSettings()
     build.unpack(BUILD_CONF)
diff --git a/tests/test_core/test_core_document.py b/tests/test_core/test_core_document.py
index 9ab3a495..8cafa69a 100644
--- a/tests/test_core/test_core_document.py
+++ b/tests/test_core/test_core_document.py
@@ -32,7 +32,7 @@ from novelwriter.core.document import NWDocument
 @pytest.mark.core
 def testCoreDocument_LoadSave(monkeypatch, mockGUI, fncPath, mockRnd):
     """Test loading and saving a document with the NWDocument class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -173,7 +173,7 @@ def testCoreDocument_LoadSave(monkeypatch, mockGUI, fncPath, mockRnd):
 def testCoreDocument_Methods(mockGUI, fncPath, mockRnd):
     """Test other methods of the NWDocument class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
diff --git a/tests/test_core/test_core_index.py b/tests/test_core/test_core_index.py
index c3b09a43..409491bf 100644
--- a/tests/test_core/test_core_index.py
+++ b/tests/test_core/test_core_index.py
@@ -42,7 +42,7 @@ def testCoreIndex_LoadSave(monkeypatch, prjLipsum, mockGUI, tstPaths):
     testFile = tstPaths.outDir / "coreIndex_LoadSave_tagsIndex.json"
     compFile = tstPaths.refDir / "coreIndex_LoadSave_tagsIndex.json"
 
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     assert theProject.openProject(prjLipsum)
 
     theIndex = NWIndex(theProject)
@@ -155,7 +155,7 @@ def testCoreIndex_LoadSave(monkeypatch, prjLipsum, mockGUI, tstPaths):
 @pytest.mark.core
 def testCoreIndex_ScanThis(mockGUI):
     """Test the tag scanner function scanThis."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theIndex = theProject.index
 
     isValid, theBits, thePos = theIndex.scanThis("tag: this, and this")
@@ -204,7 +204,7 @@ def testCoreIndex_ScanThis(mockGUI):
 def testCoreIndex_CheckThese(mockGUI, fncPath, mockRnd):
     """Test the tag checker function checkThese.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
     theIndex = theProject.index
@@ -281,7 +281,7 @@ def testCoreIndex_CheckThese(mockGUI, fncPath, mockRnd):
 @pytest.mark.core
 def testCoreIndex_ScanText(mockGUI, fncPath, mockRnd):
     """Check the index text scanner."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
     theIndex = theProject.index
@@ -502,7 +502,7 @@ def testCoreIndex_ScanText(mockGUI, fncPath, mockRnd):
 @pytest.mark.core
 def testCoreIndex_ExtractData(mockGUI, fncPath, mockRnd):
     """Check the index data extraction functions."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -941,7 +941,7 @@ def testCoreIndex_TagsIndex():
 @pytest.mark.core
 def testCoreIndex_ItemIndex(mockGUI, fncPath, mockRnd):
     """Check the ItemIndex class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
     theProject.index.clearIndex()
diff --git a/tests/test_core/test_core_item.py b/tests/test_core/test_core_item.py
index 752bfc10..2878137f 100644
--- a/tests/test_core/test_core_item.py
+++ b/tests/test_core/test_core_item.py
@@ -34,7 +34,7 @@ from novelwriter.core.project import NWProject
 @pytest.mark.core
 def testCoreItem_Setters(mockGUI, mockRnd, fncPath):
     """Test all the simple setters for the NWItem class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
     theItem = NWItem(theProject, "0000000000000")
@@ -185,7 +185,7 @@ def testCoreItem_Setters(mockGUI, mockRnd, fncPath):
 @pytest.mark.core
 def testCoreItem_Methods(mockGUI, mockRnd, fncPath):
     """Test the simple methods of the NWItem class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
     theItem = NWItem(theProject, "0000000000000")
@@ -333,7 +333,7 @@ def testCoreItem_TypeSetter(mockGUI):
     """Test the setter for all the nwItemType values for the NWItem
     class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theItem = NWItem(theProject, "0000000000000")
 
     # Type
@@ -362,7 +362,7 @@ def testCoreItem_ClassSetter(mockGUI):
     """Test the setter for all the nwItemClass values for the NWItem
     class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theItem = NWItem(theProject, "0000000000000")
 
     # Class
@@ -449,7 +449,7 @@ def testCoreItem_LayoutSetter(mockGUI):
     """Test the setter for all the nwItemLayout values for the NWItem
     class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theItem = NWItem(theProject, "0000000000000")
 
     # Faulty Layouts
@@ -477,7 +477,7 @@ def testCoreItem_LayoutSetter(mockGUI):
 def testCoreItem_ClassDefaults(mockGUI):
     """Test the setter for the default values.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theItem = NWItem(theProject, "0000000000000")
 
     # Root items should not have their class updated
@@ -532,7 +532,7 @@ def testCoreItem_ClassDefaults(mockGUI):
 @pytest.mark.core
 def testCoreItem_PackUnpack(mockGUI, caplog, mockRnd):
     """Test packing and unpacking entries for the NWItem class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theProject.data.itemStatus.write(None, "New", (100, 100, 100))
     theProject.data.itemImport.write(None, "New", (100, 100, 100))
 
diff --git a/tests/test_core/test_core_options.py b/tests/test_core/test_core_options.py
index dba4bdea..747a8f73 100644
--- a/tests/test_core/test_core_options.py
+++ b/tests/test_core/test_core_options.py
@@ -33,7 +33,7 @@ from novelwriter.gui.noveltree import NovelTreeColumn
 @pytest.mark.core
 def testCoreOptions_LoadSave(monkeypatch, mockGUI, fncPath):
     """Test loading and saving from the OptionState class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theOpts = OptionState(theProject)
 
     metaDir = fncPath / "meta"
@@ -106,7 +106,7 @@ def testCoreOptions_LoadSave(monkeypatch, mockGUI, fncPath):
 @pytest.mark.core
 def testCoreOptions_SetGet(mockGUI):
     """Test setting and getting values from the OptionState class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theOpts = OptionState(theProject)
 
     nwColHidden = NovelTreeColumn.HIDDEN
diff --git a/tests/test_core/test_core_project.py b/tests/test_core/test_core_project.py
index a14f5703..fd20714d 100644
--- a/tests/test_core/test_core_project.py
+++ b/tests/test_core/test_core_project.py
@@ -19,6 +19,7 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
+from PyQt5.QtWidgets import QMessageBox
 import pytest
 
 from shutil import copyfile
@@ -27,7 +28,7 @@ from zipfile import ZipFile
 from mocked import causeOSError
 from tools import C, cmpFiles, buildTestProject, XML_IGNORE
 
-from novelwriter import CONFIG
+from novelwriter import CONFIG, SHARED
 from novelwriter.enum import nwItemClass
 from novelwriter.constants import nwFiles
 from novelwriter.core.tree import NWTree
@@ -44,7 +45,7 @@ def testCoreProject_NewRoot(fncPath, tstPaths, mockGUI, mockRnd):
     testFile = tstPaths.outDir / "coreProject_NewRoot_nwProject.nwx"
     compFile = tstPaths.refDir / "coreProject_NewRoot_nwProject.nwx"
 
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -94,7 +95,7 @@ def testCoreProject_NewFileFolder(monkeypatch, fncPath, tstPaths, mockGUI, mockR
     testFile = tstPaths.outDir / "coreProject_NewFileFolder_nwProject.nwx"
     compFile = tstPaths.refDir / "coreProject_NewFileFolder_nwProject.nwx"
 
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -163,7 +164,7 @@ def testCoreProject_NewFileFolder(monkeypatch, fncPath, tstPaths, mockGUI, mockR
 @pytest.mark.core
 def testCoreProject_Open(monkeypatch, caplog, mockGUI, fncPath, mockRnd):
     """Test opening a project."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -204,37 +205,40 @@ def testCoreProject_Open(monkeypatch, caplog, mockGUI, fncPath, mockRnd):
         mp.setattr(ProjectXMLReader, "read", lambda *a: False)
         mp.setattr(ProjectXMLReader, "state", property(lambda *a: XMLReadState.NOT_NWX_FILE))
         assert theProject.openProject(fncPath) is False
-        assert "Project file does not appear" in mockGUI.lastAlert
+        lastMsg = SHARED.alert.logMessage if SHARED.alert else ""
+        assert "Project file does not appear" in lastMsg
 
     # Unknown project file version
     with monkeypatch.context() as mp:
         mp.setattr(ProjectXMLReader, "read", lambda *a: False)
         mp.setattr(ProjectXMLReader, "state", property(lambda *a: XMLReadState.UNKNOWN_VERSION))
         assert theProject.openProject(fncPath) is False
-        assert "Unknown or unsupported novelWriter project file" in mockGUI.lastAlert
+        lastMsg = SHARED.alert.logMessage if SHARED.alert else ""
+        assert "Unknown or unsupported novelWriter project file" in lastMsg
 
     # Other parse error
     with monkeypatch.context() as mp:
         mp.setattr(ProjectXMLReader, "read", lambda *a: False)
         mp.setattr(ProjectXMLReader, "state", property(lambda *a: XMLReadState.CANNOT_PARSE))
         assert theProject.openProject(fncPath) is False
-        assert "Failed to parse project xml" in mockGUI.lastAlert
+        lastMsg = SHARED.alert.logMessage if SHARED.alert else ""
+        assert "Failed to parse project xml" in lastMsg
 
     # Won't convert legacy file
     with monkeypatch.context() as mp:
         mp.setattr(ProjectXMLReader, "state", property(lambda *a: XMLReadState.WAS_LEGACY))
-        mockGUI.askResponse = False
+        mp.setattr(QMessageBox, "result", lambda *a: QMessageBox.No)
         assert theProject.openProject(fncPath) is False
-        assert "The file format of your project is about to be" in mockGUI.lastQuestion
-        mockGUI.askResponse = True
+        lastMsg = SHARED.alert.logMessage if SHARED.alert else ""
+        assert "The file format of your project is about to be" in lastMsg
 
     # Won't open project from newer version
     with monkeypatch.context() as mp:
         mp.setattr(ProjectXMLReader, "hexVersion", property(lambda *a: 0x99999999))
-        mockGUI.askResponse = False
+        mp.setattr(QMessageBox, "result", lambda *a: QMessageBox.No)
         assert theProject.openProject(fncPath) is False
-        assert "This project was saved by a newer version" in mockGUI.lastQuestion
-        mockGUI.askResponse = True
+        lastMsg = SHARED.alert.logMessage if SHARED.alert else ""
+        assert "This project was saved by a newer version" in lastMsg
 
     # Fail checking items should still pass
     with monkeypatch.context() as mp:
@@ -247,10 +251,10 @@ def testCoreProject_Open(monkeypatch, caplog, mockGUI, fncPath, mockRnd):
     with monkeypatch.context() as mp:
         mp.setattr(ProjectXMLReader, "state", property(lambda *a: XMLReadState.WAS_LEGACY))
         mp.setattr("novelwriter.core.index.NWIndex.loadIndex", lambda *a: True)
-        mockGUI.askResponse = True
         theProject.index._indexBroken = True
         assert theProject.openProject(fncPath) is True
-        assert "The file format of your project is about to be" in mockGUI.lastQuestion
+        lastMsg = SHARED.alert.logMessage if SHARED.alert else ""
+        assert "The file format of your project is about to be" in lastMsg
         assert theProject.index._indexBroken is False
 
     theProject.closeProject()
@@ -261,7 +265,7 @@ def testCoreProject_Open(monkeypatch, caplog, mockGUI, fncPath, mockRnd):
 @pytest.mark.core
 def testCoreProject_Save(monkeypatch, mockGUI, mockRnd, fncPath):
     """Test saving a project."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
 
     # Nothing to save
     assert theProject.saveProject() is False
@@ -290,7 +294,7 @@ def testCoreProject_Save(monkeypatch, mockGUI, mockRnd, fncPath):
 @pytest.mark.core
 def testCoreProject_AccessItems(mockGUI, fncPath, mockRnd):
     """Test helper functions for the project folder."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     buildTestProject(theProject, fncPath)
 
     # Storage Objects
@@ -354,7 +358,7 @@ def testCoreProject_AccessItems(mockGUI, fncPath, mockRnd):
 @pytest.mark.core
 def testCoreProject_StatusImport(mockGUI, fncPath, mockRnd):
     """Test the status and importance flag handling."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -463,7 +467,7 @@ def testCoreProject_StatusImport(mockGUI, fncPath, mockRnd):
 @pytest.mark.core
 def testCoreProject_Methods(monkeypatch, mockGUI, fncPath, mockRnd):
     """Test other project class methods and functions."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     buildTestProject(theProject, fncPath)
 
     # Project Name
@@ -581,7 +585,7 @@ def testCoreProject_Backup(monkeypatch, mockGUI, fncPath, tstPaths):
     backup file and checks that the project XML file is identical to
     the original file.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
 
     # No Project
     assert theProject.backupProject(doNotify=False) is False
diff --git a/tests/test_core/test_core_sessions.py b/tests/test_core/test_core_sessions.py
index 3f1353af..159e7469 100644
--- a/tests/test_core/test_core_sessions.py
+++ b/tests/test_core/test_core_sessions.py
@@ -35,7 +35,7 @@ from novelwriter.core.sessions import NWSessionLog
 @pytest.mark.core
 def testCoreSessions_Main(monkeypatch, mockGUI, fncPath):
     """Test log file handling of the NWSessionLog class."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
 
     logFile = project.storage.getMetaFile(nwFiles.SESS_FILE)
diff --git a/tests/test_core/test_core_spellcheck.py b/tests/test_core/test_core_spellcheck.py
index 9f2e59de..6b161bca 100644
--- a/tests/test_core/test_core_spellcheck.py
+++ b/tests/test_core/test_core_spellcheck.py
@@ -36,7 +36,7 @@ from novelwriter.core.spellcheck import FakeEnchant, NWSpellEnchant, UserDiction
 @pytest.mark.core
 def testCoreSpell_UserDictionary(monkeypatch, mockGUI, fncPath):
     """Test the UserDictionary class."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
 
     # Check that there is no file before we start
@@ -114,7 +114,7 @@ def testCoreSpell_UserDictionary(monkeypatch, mockGUI, fncPath):
 @pytest.mark.core
 def testCoreSpell_FakeEnchant(monkeypatch, mockGUI, fncPath):
     """Test the FakeEnchant spell checker fallback."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
 
     # Make package import fail
@@ -149,7 +149,7 @@ def testCoreSpell_FakeEnchant(monkeypatch, mockGUI, fncPath):
 @pytest.mark.core
 def testCoreSpell_Enchant(monkeypatch, mockGUI, fncPath):
     """Test the pyenchant spell checker."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
 
     # Break the enchant package, and check error handling
diff --git a/tests/test_core/test_core_storage.py b/tests/test_core/test_core_storage.py
index 77db582b..19d8a5b5 100644
--- a/tests/test_core/test_core_storage.py
+++ b/tests/test_core/test_core_storage.py
@@ -43,7 +43,7 @@ class MockProject:
 @pytest.mark.core
 def testCoreStorage_OpenProjectInPlace(mockGUI, fncPath, mockRnd):
     """Test opening a project in a folder."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
     theProject.closeProject()
@@ -180,7 +180,7 @@ def testCoreStorage_ZipIt(monkeypatch, mockGUI, fncPath, tstPaths, mockRnd):
     """Test making a zip archive of a project."""
     zipFile = tstPaths.tmpDir / "project.zip"
 
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     storage = theProject.storage
     assert storage.zipIt(zipFile) is False
 
@@ -365,7 +365,7 @@ def testCoreStorage_DeprecatedFiles(monkeypatch, fncPath):
 @pytest.mark.core
 def testCoreStorage_OldFormatConvert(monkeypatch, mockGUI, fncPath):
     """Test cleanup of deprecated files that needs to be converted."""
-    project = NWProject(mockGUI)
+    project = NWProject()
     buildTestProject(project, fncPath)
     legacy = _LegacyStorage(project)
 
diff --git a/tests/test_core/test_core_tohtml.py b/tests/test_core/test_core_tohtml.py
index ebaf1860..6c7dee61 100644
--- a/tests/test_core/test_core_tohtml.py
+++ b/tests/test_core/test_core_tohtml.py
@@ -31,7 +31,7 @@ from novelwriter.core.project import NWProject
 def testCoreToHtml_ConvertFormat(mockGUI):
     """Test the tokenizer and converter chain using the ToHtml class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theHtml = ToHtml(theProject)
 
     # Novel Files Headers
@@ -233,7 +233,7 @@ def testCoreToHtml_ConvertFormat(mockGUI):
 def testCoreToHtml_ConvertDirect(mockGUI):
     """Test the converter directly using the ToHtml class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theHtml = ToHtml(theProject)
 
     theHtml._isNovel = True
@@ -380,7 +380,7 @@ def testCoreToHtml_ConvertDirect(mockGUI):
 def testCoreToHtml_SpecialCases(mockGUI):
     """Test some special cases that have caused errors in the past.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theHtml = ToHtml(theProject)
     theHtml._isNovel = True
 
@@ -454,7 +454,7 @@ def testCoreToHtml_SpecialCases(mockGUI):
 def testCoreToHtml_Complex(mockGUI, fncPath):
     """Test the save method of the ToHtml class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theHtml = ToHtml(theProject)
     theHtml._isNovel = True
 
@@ -549,7 +549,7 @@ def testCoreToHtml_Complex(mockGUI, fncPath):
 def testCoreToHtml_Methods(mockGUI):
     """Test all the other methods of the ToHtml class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theHtml = ToHtml(theProject)
     theHtml.setKeepMarkdown(True)
 
@@ -609,7 +609,7 @@ def testCoreToHtml_Methods(mockGUI):
 def testCoreToHtml_Format(mockGUI):
     """Test all the formatters for the ToHtml class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theHtml = ToHtml(theProject)
 
     # Export Mode
diff --git a/tests/test_core/test_core_tokenizer.py b/tests/test_core/test_core_tokenizer.py
index 5214b925..d746418d 100644
--- a/tests/test_core/test_core_tokenizer.py
+++ b/tests/test_core/test_core_tokenizer.py
@@ -36,7 +36,7 @@ class BareTokenizer(Tokenizer):
 @pytest.mark.core
 def testCoreToken_Setters(mockGUI):
     """Test all the setters for the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theToken = BareTokenizer(theProject)
 
     # Verify defaults
@@ -133,7 +133,7 @@ def testCoreToken_Setters(mockGUI):
 @pytest.mark.core
 def testCoreToken_TextOps(monkeypatch, mockGUI, mockRnd, fncPath):
     """Test handling files and text in the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     mockRnd.reset()
     buildTestProject(theProject, fncPath)
 
@@ -231,7 +231,7 @@ def testCoreToken_StripEscape():
 @pytest.mark.core
 def testCoreToken_HeaderFormat(mockGUI):
     """Test the tokenization of header formats in the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theToken = BareTokenizer(theProject)
     theToken.setKeepMarkdown(True)
 
@@ -434,7 +434,7 @@ def testCoreToken_HeaderFormat(mockGUI):
 @pytest.mark.core
 def testCoreToken_MetaFormat(mockGUI):
     """Test the tokenization of meta formats in the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theToken = BareTokenizer(theProject)
     theToken.setKeepMarkdown(True)
 
@@ -502,7 +502,7 @@ def testCoreToken_MetaFormat(mockGUI):
 @pytest.mark.core
 def testCoreToken_MarginFormat(mockGUI):
     """Test the tokenization of margin formats in the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theToken = BareTokenizer(theProject)
     theToken.setKeepMarkdown(True)
 
@@ -556,7 +556,7 @@ def testCoreToken_MarginFormat(mockGUI):
 @pytest.mark.core
 def testCoreToken_TextFormat(mockGUI):
     """Test the tokenization of text formats in the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theToken = BareTokenizer(theProject)
     theToken.setKeepMarkdown(True)
 
@@ -677,7 +677,7 @@ def testCoreToken_TextFormat(mockGUI):
 @pytest.mark.core
 def testCoreToken_SpecialFormat(mockGUI):
     """Test the tokenization of special formats in the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theToken = BareTokenizer(theProject)
 
     theToken._isNovel = True
@@ -879,7 +879,7 @@ def testCoreToken_SpecialFormat(mockGUI):
 @pytest.mark.core
 def testCoreToken_ProcessHeaders(mockGUI):
     """Test the header and page parser of the Tokenizer class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theProject.data.setLanguage("en")
     theProject._loadProjectLocalisation()
     theToken = BareTokenizer(theProject)
diff --git a/tests/test_core/test_core_tomd.py b/tests/test_core/test_core_tomd.py
index f03ee8f5..06658a85 100644
--- a/tests/test_core/test_core_tomd.py
+++ b/tests/test_core/test_core_tomd.py
@@ -32,7 +32,7 @@ def testCoreToMarkdown_ConvertFormat(mockGUI):
     """Test the tokenizer and converter chain using the ToMarkdown
     class.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theMD = ToMarkdown(theProject)
 
     # Headers
@@ -159,7 +159,7 @@ def testCoreToMarkdown_ConvertFormat(mockGUI):
 @pytest.mark.core
 def testCoreToMarkdown_ConvertDirect(mockGUI):
     """Test the converter directly using the ToMarkdown class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theMD = ToMarkdown(theProject)
 
     theMD._isNovel = True
@@ -209,7 +209,7 @@ def testCoreToMarkdown_ConvertDirect(mockGUI):
 @pytest.mark.core
 def testCoreToMarkdown_Complex(mockGUI, fncPath):
     """Test the save method of the ToMarkdown class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theMD = ToMarkdown(theProject)
     theMD._isNovel = True
 
@@ -261,7 +261,7 @@ def testCoreToMarkdown_Complex(mockGUI, fncPath):
 @pytest.mark.core
 def testCoreToMarkdown_Format(mockGUI):
     """Test all the formatters for the ToMarkdown class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theMD = ToMarkdown(theProject)
 
     assert theMD._formatKeywords("", theMD.A_NONE) == ""
diff --git a/tests/test_core/test_core_toodt.py b/tests/test_core/test_core_toodt.py
index 359b0935..19962185 100644
--- a/tests/test_core/test_core_toodt.py
+++ b/tests/test_core/test_core_toodt.py
@@ -53,7 +53,7 @@ def xmlToText(xElem):
 @pytest.mark.core
 def testCoreToOdt_Init(mockGUI):
     """Test initialisation of the ODT document."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
 
     # Flat Doc
     # ========
@@ -108,7 +108,7 @@ def testCoreToOdt_Init(mockGUI):
 @pytest.mark.core
 def testCoreToOdt_TextFormatting(mockGUI):
     """Test formatting of paragraphs."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theDoc = ToOdt(theProject, isFlat=True)
 
     theDoc.initDocument()
@@ -242,7 +242,7 @@ def testCoreToOdt_TextFormatting(mockGUI):
 @pytest.mark.core
 def testCoreToOdt_Convert(mockGUI):
     """Test the converter of the ToOdt class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theDoc = ToOdt(theProject, isFlat=True)
 
     theDoc._isNovel = True
@@ -573,7 +573,7 @@ def testCoreToOdt_ConvertDirect(mockGUI):
     """Test the converter directly using the ToOdt class to reach some
     otherwise hard to reach conditions.
     """
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theDoc = ToOdt(theProject, isFlat=True)
 
     theDoc._isNovel = True
@@ -626,7 +626,7 @@ def testCoreToOdt_ConvertDirect(mockGUI):
 @pytest.mark.core
 def testCoreToOdt_SaveFlat(mockGUI, fncPath, tstPaths):
     """Test the document save functions."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theProject.data.setAuthor("Jane Smith")
     theProject.data.setName("Test Project")
     theProject.data.setSaveCount(1234)
@@ -668,7 +668,7 @@ def testCoreToOdt_SaveFlat(mockGUI, fncPath, tstPaths):
 @pytest.mark.core
 def testCoreToOdt_SaveFull(mockGUI, fncPath, tstPaths):
     """Test the document save functions."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theProject.data.setAuthor("Jane Smith")
     theProject.data.setName("Test Project")
     theProject.data.setSaveCount(1234)
@@ -745,7 +745,7 @@ def testCoreToOdt_SaveFull(mockGUI, fncPath, tstPaths):
 @pytest.mark.core
 def testCoreToOdt_Format(mockGUI):
     """Test the formatters for the ToOdt class."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theDoc = ToOdt(theProject, isFlat=True)
 
     assert theDoc._formatSynopsis("synopsis text") == (
diff --git a/tests/test_core/test_core_tree.py b/tests/test_core/test_core_tree.py
index c2301bf7..2bac97da 100644
--- a/tests/test_core/test_core_tree.py
+++ b/tests/test_core/test_core_tree.py
@@ -39,7 +39,7 @@ from novelwriter.core.project import NWProject
 @pytest.fixture(scope="function")
 def mockItems(mockGUI, mockRnd):
     """Create a list of mock items."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
 
     itemA = NWItem(theProject, "a000000000001")
     itemA._name = "Novel"
@@ -112,7 +112,7 @@ def mockItems(mockGUI, mockRnd):
 @pytest.mark.core
 def testCoreTree_BuildTree(mockGUI, mockItems):
     """Test building a project tree from a list of items."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     # Check that tree is empty (calls NWTree.__bool__)
@@ -269,7 +269,7 @@ def testCoreTree_BuildTree(mockGUI, mockItems):
 @pytest.mark.core
 def testCoreTree_PackUnpack(mockGUI, mockItems):
     """Test packing and unpacking data."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     aHandles = []
@@ -298,7 +298,7 @@ def testCoreTree_PackUnpack(mockGUI, mockItems):
 @pytest.mark.core
 def testCoreTree_CheckConsistency(caplog: pytest.LogCaptureFixture, mockGUI, fncPath, mockRnd):
     """Check the project consistency."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     buildTestProject(theProject, fncPath)
 
     # By default, all is well
@@ -365,7 +365,7 @@ def testCoreTree_CheckConsistency(caplog: pytest.LogCaptureFixture, mockGUI, fnc
 @pytest.mark.core
 def testCoreTree_Methods(mockGUI, mockItems):
     """Test various class methods."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     for nwItem in mockItems:
@@ -446,7 +446,7 @@ def testCoreTree_Methods(mockGUI, mockItems):
 def testCoreTree_MakeHandles(mockGUI):
     """Test generating item handles."""
     random.seed(42)
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     handles = ["1c803a3b1799d", "bdd6406671ad1", "3eb1346685257", "23b8c392456de"]
@@ -474,7 +474,7 @@ def testCoreTree_MakeHandles(mockGUI):
 @pytest.mark.core
 def testCoreTree_Stats(mockGUI, mockItems):
     """Test project stats methods."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     for nwItem in mockItems:
@@ -494,7 +494,7 @@ def testCoreTree_Stats(mockGUI, mockItems):
 @pytest.mark.core
 def testCoreTree_Reorder(caplog, mockGUI, mockItems):
     """Test changing tree order."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     aHandle = []
@@ -529,7 +529,7 @@ def testCoreTree_Reorder(caplog, mockGUI, mockItems):
 @pytest.mark.core
 def testCoreTree_ToCFile(monkeypatch, fncPath, mockGUI, mockItems):
     """Test writing the ToC.txt file."""
-    theProject = NWProject(mockGUI)
+    theProject = NWProject()
     theTree = NWTree(theProject)
 
     for nwItem in mockItems: