diff --git a/tests/conftest.py b/tests/conftest.py
index dd2004d6..9435eee6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -28,19 +28,60 @@ from pathlib import Path
 from mock import MockGuiMain
 from tools import cleanProject
 
+from PyQt5.QtWidgets import QMessageBox
+
 sys.path.insert(1, str(Path(__file__).parent.parent.absolute()))
 
-import novelwriter  # noqa: E402
+from novelwriter import CONFIG, main  # noqa: E402
 
-from PyQt5.QtWidgets import QMessageBox  # noqa: E402
-
-from novelwriter.config import Config  # noqa: E402
+_TST_ROOT = Path(__file__).parent
+_TMP_ROOT = _TST_ROOT / "temp"
+_TMP_CONF = _TMP_ROOT / "conf"
 
 
-@pytest.fixture(autouse=True)
-def initQt(qtbot):
-    """Ensures that the qt main thread is always available in all tests.
+##
+#  Helper Functions
+##
+
+def resetConfigVars():
+    """Reset the CONFIG object and set various values for testing to
+    prevent interfering with local OS.
     """
+    CONFIG.setLastPath(_TMP_ROOT)
+    CONFIG.setBackupPath(_TMP_ROOT)
+    CONFIG._homePath = _TMP_ROOT
+    CONFIG.guiLocale = "en_GB"
+    return
+
+
+##
+#  Auto Fixtures
+##
+
+@pytest.fixture(scope="session", autouse=True)
+def sessionFixture():
+    """A session wide fixture to set up the test environment.
+    """
+    if _TMP_ROOT.exists():
+        shutil.rmtree(_TMP_ROOT)
+    _TMP_ROOT.mkdir()
+    _TMP_CONF.mkdir()
+    return
+
+
+@pytest.fixture(scope="function", autouse=True)
+def functionFixture(qtbot):
+    """Ensures that the main Qt thread is always available, and reset
+    the config object for each function and redirect its storage paths.
+    """
+    if _TMP_CONF.exists():
+        shutil.rmtree(_TMP_CONF)
+    _TMP_CONF.mkdir()
+
+    CONFIG.__init__()
+    CONFIG.initConfig(confPath=_TMP_CONF, dataPath=_TMP_CONF)
+    resetConfigVars()
+
     return
 
 
@@ -49,26 +90,17 @@ def initQt(qtbot):
 ##
 
 @pytest.fixture(scope="session")
-def tmpPath():
-    """A temporary folder for the test session. Path version.
-    """
-    theTemp = Path(__file__).parent / "temp"
-    if theTemp.exists():
-        shutil.rmtree(theTemp)
-    theTemp.mkdir(exist_ok=True)
-    return theTemp
-
-
-@pytest.fixture(scope="session")
-def tstPaths(tmpPath):
+def tstPaths():
     """Returns an object that can provide the various paths needed for
     running tests.
     """
     class _Store:
-        testDir = Path(__file__).parent
-        filesDir = testDir / "files"
-        refDir = testDir / "reference"
-        outDir = tmpPath / "results"
+        testDir = _TST_ROOT
+        filesDir = _TST_ROOT / "files"
+        refDir = _TST_ROOT / "reference"
+        outDir = _TMP_ROOT / "results"
+        tmpDir = _TMP_ROOT
+        cnfDir = _TMP_CONF
 
     store = _Store()
     store.outDir.mkdir(exist_ok=True)
@@ -77,10 +109,10 @@ def tstPaths(tmpPath):
 
 
 @pytest.fixture(scope="function")
-def fncPath(tmpPath):
-    """A temporary folder for a single test function. Path version.
+def fncPath():
+    """A temporary folder for a single test function.
     """
-    fncPath = tmpPath / "function"
+    fncPath = _TMP_ROOT / "function"
     if fncPath.is_dir():
         shutil.rmtree(fncPath)
     fncPath.mkdir(exist_ok=True)
@@ -103,46 +135,17 @@ def projPath(fncPath):
 #  novelWriter Objects
 ##
 
-@pytest.fixture(scope="function")
-def tmpConf(tmpPath):
-    """Create a temporary novelWriter configuration object.
-    """
-    confFile = tmpPath / "novelwriter.conf"
-    if confFile.is_file():
-        confFile.unlink()
-    theConf = Config()
-    theConf.initConfig(tmpPath, tmpPath)
-    theConf.setLastPath(tmpPath)
-    theConf.guiLocale = "en_GB"
-    return theConf
-
 
 @pytest.fixture(scope="function")
-def fncConf(fncPath):
-    """Create a temporary novelWriter configuration object.
-    """
-    confFile = fncPath / "novelwriter.conf"
-    if confFile.is_file():
-        confFile.unlink()
-    theConf = Config()
-    theConf.initConfig(fncPath, fncPath)
-    theConf.setLastPath(fncPath)
-    theConf.guiLocale = "en_GB"
-    return theConf
-
-
-@pytest.fixture(scope="function")
-def mockGUI(monkeypatch, tmpConf):
+def mockGUI():
     """Create a mock instance of novelWriter's main GUI class.
     """
-    monkeypatch.setattr("novelwriter.CONFIG", tmpConf)
     theGui = MockGuiMain()
-    theGui.mainConf = tmpConf
     return theGui
 
 
 @pytest.fixture(scope="function")
-def nwGUI(qtbot, monkeypatch, fncPath, fncConf):
+def nwGUI(qtbot, monkeypatch, functionFixture):
     """Create an instance of the novelWriter GUI.
     """
     monkeypatch.setattr(QMessageBox, "warning", lambda *a: QMessageBox.Ok)
@@ -150,14 +153,13 @@ def nwGUI(qtbot, monkeypatch, fncPath, fncConf):
     monkeypatch.setattr(QMessageBox, "information", lambda *a: QMessageBox.Ok)
     monkeypatch.setattr(QMessageBox, "question", lambda *a: QMessageBox.Yes)
 
-    monkeypatch.setattr("novelwriter.CONFIG", fncConf)
-    nwGUI = novelwriter.main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
+    nwGUI = main(["--testmode", f"--config={_TMP_CONF}", f"--data={_TMP_CONF}"])
     qtbot.addWidget(nwGUI)
+    resetConfigVars()
+
     nwGUI.show()
     qtbot.wait(20)
 
-    nwGUI.mainConf.setLastPath(fncPath)
-
     yield nwGUI
 
     qtbot.wait(20)
@@ -198,13 +200,12 @@ def mockRnd(monkeypatch):
 ##
 
 @pytest.fixture(scope="function")
-def nwLipsum(tmpPath):
+def nwLipsum():
     """A medium sized novelWriter example project with a lot of Lorem
     Ipsum text.
     """
-    tstDir = Path(__file__).parent
-    srcDir = tstDir / "lipsum"
-    dstDir = tmpPath / "lipsum"
+    srcDir = _TST_ROOT / "lipsum"
+    dstDir = _TMP_ROOT / "lipsum"
     if dstDir.exists():
         shutil.rmtree(dstDir)
 
@@ -220,13 +221,12 @@ def nwLipsum(tmpPath):
 
 
 @pytest.fixture(scope="function")
-def prjLipsum(tmpPath):
+def prjLipsum():
     """A medium sized novelWriter example project with a lot of Lorem
     Ipsum text.
     """
-    tstDir = Path(__file__).parent
-    srcDir = tstDir / "lipsum"
-    dstDir = tmpPath / "lipsum"
+    srcDir = _TST_ROOT / "lipsum"
+    dstDir = _TMP_ROOT / "lipsum"
     if dstDir.exists():
         shutil.rmtree(dstDir)
 
diff --git a/tests/test_base/test_base_config.py b/tests/test_base/test_base_config.py
index 17d9ddf9..0d986906 100644
--- a/tests/test_base/test_base_config.py
+++ b/tests/test_base/test_base_config.py
@@ -28,6 +28,7 @@ from pathlib import Path
 from mock import causeOSError, MockApp
 from tools import cmpFiles, writeFile
 
+from novelwriter import CONFIG
 from novelwriter.config import Config, RecentProjects
 from novelwriter.constants import nwFiles
 
@@ -196,197 +197,206 @@ def testBaseConfig_Localisation(fncPath, tstPaths):
 
 
 @pytest.mark.base
-def testBaseConfig_Methods(tmpConf, tmpPath):
+def testBaseConfig_Methods(fncPath):
     """Check class methods.
     """
+    tstConf = Config()
+    tstConf.initConfig(confPath=fncPath, dataPath=fncPath)
+
     # Data Path
-    assert tmpConf.dataPath() == tmpPath
-    assert tmpConf.dataPath("stuff") == tmpPath / "stuff"
+    assert tstConf.dataPath() == fncPath
+    assert tstConf.dataPath("stuff") == fncPath / "stuff"
 
     # Assets Path
-    appPath = tmpConf._appPath
-    assert tmpConf.assetPath() == appPath / "assets"
-    assert tmpConf.assetPath("stuff") == appPath / "assets" / "stuff"
+    appPath = tstConf._appPath
+    assert tstConf.assetPath() == appPath / "assets"
+    assert tstConf.assetPath("stuff") == appPath / "assets" / "stuff"
 
     # Last Path
-    assert tmpConf.lastPath() == tmpPath
+    assert tstConf.lastPath() == Path.home().absolute()
 
-    tmpStuff = tmpPath / "stuff"
+    tmpStuff = fncPath / "stuff"
     tmpStuff.mkdir()
-    tmpConf.setLastPath(tmpStuff)
-    assert tmpConf.lastPath() == tmpStuff
+    tstConf.setLastPath(tmpStuff)
+    assert tstConf.lastPath() == tmpStuff
 
     fileStuff = tmpStuff / "more_stuff.txt"
     fileStuff.write_text("Stuff")
-    tmpConf.setLastPath(fileStuff)
-    assert tmpConf.lastPath() == tmpStuff
+    tstConf.setLastPath(fileStuff)
+    assert tstConf.lastPath() == tmpStuff
 
     fileStuff.unlink()
     tmpStuff.rmdir()
-    assert tmpConf.lastPath() == Path.home().absolute()
+    assert tstConf.lastPath() == Path.home().absolute()
 
     # Recent Projects
-    assert isinstance(tmpConf.recentProjects, RecentProjects)
+    assert isinstance(tstConf.recentProjects, RecentProjects)
 
 # END Test testBaseConfig_Methods
 
 
 @pytest.mark.base
-def testBaseConfig_SettersGetters(tmpConf):
+def testBaseConfig_SettersGetters(fncPath):
     """Set various sizes and positions
     """
+    tstConf = Config()
+    tstConf.initConfig(confPath=fncPath, dataPath=fncPath)
+
     # GUI Scaling
     # ===========
 
-    tmpConf.guiScale = 1.0
-    assert tmpConf.pxInt(10) == 10
-    assert tmpConf.pxInt(13) == 13
-    assert tmpConf.rpxInt(10) == 10
-    assert tmpConf.rpxInt(13) == 13
+    tstConf.guiScale = 1.0
+    assert tstConf.pxInt(10) == 10
+    assert tstConf.pxInt(13) == 13
+    assert tstConf.rpxInt(10) == 10
+    assert tstConf.rpxInt(13) == 13
 
-    tmpConf.guiScale = 2.0
-    assert tmpConf.pxInt(10) == 20
-    assert tmpConf.pxInt(13) == 26
-    assert tmpConf.rpxInt(10) == 5
-    assert tmpConf.rpxInt(13) == 6
+    tstConf.guiScale = 2.0
+    assert tstConf.pxInt(10) == 20
+    assert tstConf.pxInt(13) == 26
+    assert tstConf.rpxInt(10) == 5
+    assert tstConf.rpxInt(13) == 6
 
     # Setter + Getter Combos
     # ======================
 
     # Window Size
-    tmpConf.guiScale = 1.0
-    tmpConf.setMainWinSize(1205, 655)
-    assert tmpConf.mainWinSize == [1200, 650]
+    tstConf.guiScale = 1.0
+    tstConf.setMainWinSize(1205, 655)
+    assert tstConf.mainWinSize == [1200, 650]
 
-    tmpConf.guiScale = 2.0
-    tmpConf.setMainWinSize(70, 70)
-    assert tmpConf.mainWinSize == [70, 70]
-    assert tmpConf._mainWinSize == [35, 35]
+    tstConf.guiScale = 2.0
+    tstConf.setMainWinSize(70, 70)
+    assert tstConf.mainWinSize == [70, 70]
+    assert tstConf._mainWinSize == [35, 35]
 
-    tmpConf.guiScale = 1.0
-    tmpConf.setMainWinSize(70, 70)
-    assert tmpConf.mainWinSize == [70, 70]
-    assert tmpConf._mainWinSize == [70, 70]
+    tstConf.guiScale = 1.0
+    tstConf.setMainWinSize(70, 70)
+    assert tstConf.mainWinSize == [70, 70]
+    assert tstConf._mainWinSize == [70, 70]
 
-    tmpConf.setMainWinSize(1200, 650)
+    tstConf.setMainWinSize(1200, 650)
 
     # Preferences Size
-    tmpConf.guiScale = 2.0
-    tmpConf.setPreferencesWinSize(70, 70)
-    assert tmpConf.preferencesWinSize == [70, 70]
-    assert tmpConf._prefsWinSize == [35, 35]
+    tstConf.guiScale = 2.0
+    tstConf.setPreferencesWinSize(70, 70)
+    assert tstConf.preferencesWinSize == [70, 70]
+    assert tstConf._prefsWinSize == [35, 35]
 
-    tmpConf.guiScale = 1.0
-    tmpConf.setPreferencesWinSize(70, 70)
-    assert tmpConf.preferencesWinSize == [70, 70]
-    assert tmpConf._prefsWinSize == [70, 70]
+    tstConf.guiScale = 1.0
+    tstConf.setPreferencesWinSize(70, 70)
+    assert tstConf.preferencesWinSize == [70, 70]
+    assert tstConf._prefsWinSize == [70, 70]
 
-    tmpConf.setPreferencesWinSize(700, 615)
+    tstConf.setPreferencesWinSize(700, 615)
 
     # Project Settings Tree Columns
-    tmpConf.guiScale = 2.0
-    tmpConf.setProjLoadColWidths([10, 20, 30])
-    assert tmpConf.projLoadColWidths == [10, 20, 30]
-    assert tmpConf._projLoadCols == [5, 10, 15]
+    tstConf.guiScale = 2.0
+    tstConf.setProjLoadColWidths([10, 20, 30])
+    assert tstConf.projLoadColWidths == [10, 20, 30]
+    assert tstConf._projLoadCols == [5, 10, 15]
 
-    tmpConf.guiScale = 1.0
-    tmpConf.setProjLoadColWidths([10, 20, 30])
-    assert tmpConf.projLoadColWidths == [10, 20, 30]
-    assert tmpConf._projLoadCols == [10, 20, 30]
+    tstConf.guiScale = 1.0
+    tstConf.setProjLoadColWidths([10, 20, 30])
+    assert tstConf.projLoadColWidths == [10, 20, 30]
+    assert tstConf._projLoadCols == [10, 20, 30]
 
-    tmpConf.setProjLoadColWidths([200, 60, 140])
+    tstConf.setProjLoadColWidths([200, 60, 140])
 
     # Main Pane Splitter
-    tmpConf.guiScale = 2.0
-    tmpConf.setMainPanePos([200, 700])
-    assert tmpConf.mainPanePos == [200, 700]
-    assert tmpConf._mainPanePos == [100, 350]
+    tstConf.guiScale = 2.0
+    tstConf.setMainPanePos([200, 700])
+    assert tstConf.mainPanePos == [200, 700]
+    assert tstConf._mainPanePos == [100, 350]
 
-    tmpConf.guiScale = 1.0
-    tmpConf.setMainPanePos([200, 700])
-    assert tmpConf.mainPanePos == [200, 700]
-    assert tmpConf._mainPanePos == [200, 700]
+    tstConf.guiScale = 1.0
+    tstConf.setMainPanePos([200, 700])
+    assert tstConf.mainPanePos == [200, 700]
+    assert tstConf._mainPanePos == [200, 700]
 
-    tmpConf.setMainPanePos([300, 800])
+    tstConf.setMainPanePos([300, 800])
 
     # View Pane Splitter
-    tmpConf.guiScale = 2.0
-    tmpConf.setViewPanePos([400, 250])
-    assert tmpConf.viewPanePos == [400, 250]
-    assert tmpConf._viewPanePos == [200, 125]
+    tstConf.guiScale = 2.0
+    tstConf.setViewPanePos([400, 250])
+    assert tstConf.viewPanePos == [400, 250]
+    assert tstConf._viewPanePos == [200, 125]
 
-    tmpConf.guiScale = 1.0
-    tmpConf.setViewPanePos([400, 250])
-    assert tmpConf.viewPanePos == [400, 250]
-    assert tmpConf._viewPanePos == [400, 250]
+    tstConf.guiScale = 1.0
+    tstConf.setViewPanePos([400, 250])
+    assert tstConf.viewPanePos == [400, 250]
+    assert tstConf._viewPanePos == [400, 250]
 
-    tmpConf.setViewPanePos([500, 150])
+    tstConf.setViewPanePos([500, 150])
 
     # Outline Pane Splitter
-    tmpConf.guiScale = 2.0
-    tmpConf.setOutlinePanePos([400, 250])
-    assert tmpConf.outlinePanePos == [400, 250]
-    assert tmpConf._outlnPanePos == [200, 125]
+    tstConf.guiScale = 2.0
+    tstConf.setOutlinePanePos([400, 250])
+    assert tstConf.outlinePanePos == [400, 250]
+    assert tstConf._outlnPanePos == [200, 125]
 
-    tmpConf.guiScale = 1.0
-    tmpConf.setOutlinePanePos([400, 250])
-    assert tmpConf.outlinePanePos == [400, 250]
-    assert tmpConf._outlnPanePos == [400, 250]
+    tstConf.guiScale = 1.0
+    tstConf.setOutlinePanePos([400, 250])
+    assert tstConf.outlinePanePos == [400, 250]
+    assert tstConf._outlnPanePos == [400, 250]
 
-    tmpConf.setOutlinePanePos([500, 150])
+    tstConf.setOutlinePanePos([500, 150])
 
     # Getters Only
     # ============
 
-    tmpConf.guiScale = 1.0
-    assert tmpConf.getTextWidth(False) == 700
-    assert tmpConf.getTextWidth(True) == 800
-    assert tmpConf.getTextMargin() == 40
-    assert tmpConf.getTabWidth() == 40
+    tstConf.guiScale = 1.0
+    assert tstConf.getTextWidth(False) == 700
+    assert tstConf.getTextWidth(True) == 800
+    assert tstConf.getTextMargin() == 40
+    assert tstConf.getTabWidth() == 40
 
-    tmpConf.guiScale = 2.0
-    assert tmpConf.getTextWidth(False) == 1400
-    assert tmpConf.getTextWidth(True) == 1600
-    assert tmpConf.getTextMargin() == 80
-    assert tmpConf.getTabWidth() == 80
+    tstConf.guiScale = 2.0
+    assert tstConf.getTextWidth(False) == 1400
+    assert tstConf.getTextWidth(True) == 1600
+    assert tstConf.getTextMargin() == 80
+    assert tstConf.getTabWidth() == 80
 
 # END Test testBaseConfig_SettersGetters
 
 
 @pytest.mark.base
-def testBaseConfig_Internal(monkeypatch, tmpConf):
+def testBaseConfig_Internal(monkeypatch, fncPath):
     """Check internal functions.
     """
+    tstConf = Config()
+    tstConf.initConfig(confPath=fncPath, dataPath=fncPath)
+
     # Function _packList
-    assert tmpConf._packList(["A", 1, 2.0, None, False]) == "A, 1, 2.0, None, False"
+    assert tstConf._packList(["A", 1, 2.0, None, False]) == "A, 1, 2.0, None, False"
 
     # Function _checkNone
-    assert tmpConf._checkNone(None) is None
-    assert tmpConf._checkNone("None") is None
-    assert tmpConf._checkNone("none") is None
-    assert tmpConf._checkNone("NONE") is None
-    assert tmpConf._checkNone("NoNe") is None
-    assert tmpConf._checkNone(123456) == 123456
+    assert tstConf._checkNone(None) is None
+    assert tstConf._checkNone("None") is None
+    assert tstConf._checkNone("none") is None
+    assert tstConf._checkNone("NONE") is None
+    assert tstConf._checkNone("NoNe") is None
+    assert tstConf._checkNone(123456) == 123456
 
     # Function _checkOptionalPackages
     # (Assumes enchant package exists and is importable)
-    tmpConf._checkOptionalPackages()
-    assert tmpConf.hasEnchant is True
+    tstConf._checkOptionalPackages()
+    assert tstConf.hasEnchant is True
 
     with monkeypatch.context() as mp:
         mp.setitem(sys.modules, "enchant", None)
-        tmpConf._checkOptionalPackages()
-        assert tmpConf.hasEnchant is False
+        tstConf._checkOptionalPackages()
+        assert tstConf.hasEnchant is False
 
 # END Test testBaseConfig_Internal
 
 
 @pytest.mark.base
-def testBaseConfig_RecentCache(monkeypatch, fncConf, fncPath):
+def testBaseConfig_RecentCache(monkeypatch, tstPaths):
     """Test recent cache file.
     """
-    cacheFile = fncPath / nwFiles.RECENT_FILE
-    recent = RecentProjects(fncConf)
+    cacheFile = tstPaths.cnfDir / nwFiles.RECENT_FILE
+    recent = RecentProjects(CONFIG)
 
     # Load when there is no file should pass, but load nothing
     assert not cacheFile.exists()
@@ -394,8 +404,8 @@ def testBaseConfig_RecentCache(monkeypatch, fncConf, fncPath):
     assert recent.listEntries() == []
 
     # Add a couple of values
-    pathOne = fncPath / "projPathOne" / nwFiles.PROJ_FILE
-    pathTwo = fncPath / "projPathTwo" / nwFiles.PROJ_FILE
+    pathOne = tstPaths.cnfDir / "projPathOne" / nwFiles.PROJ_FILE
+    pathTwo = tstPaths.cnfDir / "projPathTwo" / nwFiles.PROJ_FILE
 
     recent.update(pathOne, "Proj One", 100, 1600002000)
     recent.update(pathTwo, "Proj Two", 200, 1600005600)
diff --git a/tests/test_base/test_base_init.py b/tests/test_base/test_base_init.py
index 3c5b6780..4fab9108 100644
--- a/tests/test_base/test_base_init.py
+++ b/tests/test_base/test_base_init.py
@@ -28,13 +28,13 @@ from mock import MockGuiMain
 
 
 @pytest.mark.base
-def testBaseInit_Launch(caplog, monkeypatch, tmpPath):
+def testBaseInit_Launch(caplog, monkeypatch, fncPath):
     """Check launching the main GUI.
     """
     monkeypatch.setattr("novelwriter.guimain.GuiMain", MockGuiMain)
 
     # TestMode Launch
-    nwGUI = novelwriter.main(["--testmode", f"--config={tmpPath}", f"--data={tmpPath}"])
+    nwGUI = novelwriter.main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
     assert isinstance(nwGUI, MockGuiMain)
 
     # Darwin Launch
@@ -43,7 +43,7 @@ def testBaseInit_Launch(caplog, monkeypatch, tmpPath):
     novelwriter.CONFIG.osDarwin = True
     with monkeypatch.context() as mp:
         mp.setitem(sys.modules, "Foundation", None)
-        nwGUI = novelwriter.main(["--testmode", f"--config={tmpPath}", f"--data={tmpPath}"])
+        nwGUI = novelwriter.main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
         assert isinstance(nwGUI, MockGuiMain)
         assert "Failed" in caplog.text
 
@@ -55,7 +55,7 @@ def testBaseInit_Launch(caplog, monkeypatch, tmpPath):
     novelwriter.CONFIG.osWindows = True
     with monkeypatch.context() as mp:
         mp.setitem(sys.modules, "ctypes", None)
-        nwGUI = novelwriter.main(["--testmode", f"--config={tmpPath}", f"--data={tmpPath}"])
+        nwGUI = novelwriter.main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
         assert isinstance(nwGUI, MockGuiMain)
         if not sys.platform.startswith("darwin"):
             # For some reason, the test doesn't work on macOS
@@ -71,19 +71,19 @@ def testBaseInit_Launch(caplog, monkeypatch, tmpPath):
     monkeypatch.setattr("PyQt5.QtWidgets.QApplication.setOrganizationDomain", lambda *a: None)
     monkeypatch.setattr("PyQt5.QtWidgets.QApplication.exec_", lambda *a: 0)
     with pytest.raises(SystemExit) as ex:
-        novelwriter.main([f"--config={tmpPath}", f"--data={tmpPath}"])
+        novelwriter.main([f"--config={fncPath}", f"--data={fncPath}"])
         assert ex.value.code == 0
 
 # END Test testBaseInit_Launch
 
 
 @pytest.mark.base
-def testBaseInit_Options(monkeypatch, tmpPath):
+def testBaseInit_Options(monkeypatch, fncPath):
     """Test command line options for logging level.
     """
     monkeypatch.setattr("novelwriter.guimain.GuiMain", MockGuiMain)
     monkeypatch.setattr(sys, "argv", [
-        "novelWriter.py", "--testmode", f"--config={tmpPath}", f"--data={tmpPath}"
+        "novelWriter.py", "--testmode", f"--config={fncPath}", f"--data={fncPath}"
     ])
 
     # Defaults w/None Args
@@ -93,20 +93,20 @@ def testBaseInit_Options(monkeypatch, tmpPath):
 
     # Defaults
     nwGUI = novelwriter.main(
-        ["--testmode", f"--config={tmpPath}", f"--data={tmpPath}", "--style=Fusion"]
+        ["--testmode", f"--config={fncPath}", f"--data={fncPath}", "--style=Fusion"]
     )
     assert novelwriter.logger.getEffectiveLevel() == logging.WARNING
     assert nwGUI.closeMain() == "closeMain"
 
     # Log Levels
     nwGUI = novelwriter.main(
-        ["--testmode", "--info", f"--config={tmpPath}", f"--data={tmpPath}"]
+        ["--testmode", "--info", f"--config={fncPath}", f"--data={fncPath}"]
     )
     assert novelwriter.logger.getEffectiveLevel() == logging.INFO
     assert nwGUI.closeMain() == "closeMain"
 
     nwGUI = novelwriter.main(
-        ["--testmode", "--debug", f"--config={tmpPath}", f"--data={tmpPath}"]
+        ["--testmode", "--debug", f"--config={fncPath}", f"--data={fncPath}"]
     )
     assert novelwriter.logger.getEffectiveLevel() == logging.DEBUG
     assert nwGUI.closeMain() == "closeMain"
@@ -114,14 +114,14 @@ def testBaseInit_Options(monkeypatch, tmpPath):
     # Help and Version
     with pytest.raises(SystemExit) as ex:
         nwGUI = novelwriter.main(
-            ["--testmode", "--help", f"--config={tmpPath}", f"--data={tmpPath}"]
+            ["--testmode", "--help", f"--config={fncPath}", f"--data={fncPath}"]
         )
     assert nwGUI.closeMain() == "closeMain"
     assert ex.value.code == 0
 
     with pytest.raises(SystemExit) as ex:
         nwGUI = novelwriter.main(
-            ["--testmode", "--version", f"--config={tmpPath}", f"--data={tmpPath}"]
+            ["--testmode", "--version", f"--config={fncPath}", f"--data={fncPath}"]
         )
     assert nwGUI.closeMain() == "closeMain"
     assert ex.value.code == 0
@@ -129,14 +129,14 @@ def testBaseInit_Options(monkeypatch, tmpPath):
     # Invalid options
     with pytest.raises(SystemExit) as ex:
         nwGUI = novelwriter.main(
-            ["--testmode", "--invalid", f"--config={tmpPath}", f"--data={tmpPath}"]
+            ["--testmode", "--invalid", f"--config={fncPath}", f"--data={fncPath}"]
         )
     assert nwGUI.closeMain() == "closeMain"
     assert ex.value.code == 2
 
     # Project Path
     nwGUI = novelwriter.main(
-        ["--testmode", f"--config={tmpPath}", f"--data={tmpPath}", "sample/"]
+        ["--testmode", f"--config={fncPath}", f"--data={fncPath}", "sample/"]
     )
     assert nwGUI.closeMain() == "closeMain"
 
@@ -144,7 +144,7 @@ def testBaseInit_Options(monkeypatch, tmpPath):
 
 
 @pytest.mark.base
-def testBaseInit_Imports(caplog, monkeypatch, tmpPath):
+def testBaseInit_Imports(caplog, monkeypatch, fncPath):
     """Check import error handling.
     """
     monkeypatch.setattr("novelwriter.guimain.GuiMain", MockGuiMain)
@@ -160,7 +160,7 @@ def testBaseInit_Imports(caplog, monkeypatch, tmpPath):
 
     with pytest.raises(SystemExit) as ex:
         _ = novelwriter.main(
-            ["--testmode", f"--config={tmpPath}", f"--data={tmpPath}"]
+            ["--testmode", f"--config={fncPath}", f"--data={fncPath}"]
         )
 
     assert ex.value.code & 4 == 4    # Python version not satisfied
diff --git a/tests/test_core/test_core_coretools.py b/tests/test_core/test_core_coretools.py
index d3789b80..585a9fae 100644
--- a/tests/test_core/test_core_coretools.py
+++ b/tests/test_core/test_core_coretools.py
@@ -28,6 +28,7 @@ from zipfile import ZipFile
 from mock import causeOSError
 from tools import C, buildTestProject, cmpFiles, XML_IGNORE
 
+from novelwriter import CONFIG
 from novelwriter.constants import nwItemClass
 from novelwriter.core.project import NWProject
 from novelwriter.core.coretools import DocMerger, DocSplitter, ProjectBuilder
@@ -371,7 +372,7 @@ def testCoreTools_NewCustomB(monkeypatch, fncPath, tstPaths, mockGUI, mockRnd):
 
 
 @pytest.mark.core
-def testCoreTools_NewSample(monkeypatch, fncPath, tmpConf, tmpPath, mockGUI):
+def testCoreTools_NewSample(monkeypatch, fncPath, tstPaths, mockGUI):
     """Check that we can create a new project can be created from the
     provided sample project via a zip file.
     """
@@ -391,10 +392,10 @@ def testCoreTools_NewSample(monkeypatch, fncPath, tmpConf, tmpPath, mockGUI):
     assert projBuild.buildProject({"popSample": True}) is False
 
     # Force the lookup path for assets to our temp folder
-    srcSample = tmpConf._appRoot / "sample"
-    dstSample = tmpPath / "sample.zip"
+    srcSample = CONFIG._appRoot / "sample"
+    dstSample = tstPaths.tmpDir / "sample.zip"
     monkeypatch.setattr(
-        "novelwriter.config.Config.assetPath", lambda *a: tmpPath / "sample.zip"
+        "novelwriter.config.Config.assetPath", lambda *a: tstPaths.tmpDir / "sample.zip"
     )
 
     # Cannot extract when the zip does not exist
diff --git a/tests/test_core/test_core_project.py b/tests/test_core/test_core_project.py
index eee8e2ba..9d4365a3 100644
--- a/tests/test_core/test_core_project.py
+++ b/tests/test_core/test_core_project.py
@@ -704,7 +704,7 @@ def testCoreProject_OrphanedFiles(mockGUI, prjLipsum):
 
 
 @pytest.mark.core
-def testCoreProject_Backup(monkeypatch, mockGUI, fncPath, tmpPath):
+def testCoreProject_Backup(monkeypatch, mockGUI, fncPath, tstPaths):
     """Test the automated backup feature of the project class. The test
     creates a backup of the Minimal test project, and then unzips the
     backupd file and checks that the project XML file is identical to
@@ -720,23 +720,18 @@ def testCoreProject_Backup(monkeypatch, mockGUI, fncPath, tmpPath):
     # Invalid Settings
     # ================
 
-    # No project
-    mockGUI.hasProject = False
-    assert theProject.backupProject(doNotify=False) is False
-    mockGUI.hasProject = True
-
     # Invalid path
     theProject.mainConf._backupPath = None
     assert theProject.backupProject(doNotify=False) is False
 
     # Missing project name
-    theProject.mainConf._backupPath = tmpPath
+    theProject.mainConf._backupPath = tstPaths.tmpDir
     theProject.data.setName("")
     assert theProject.backupProject(doNotify=False) is False
 
     # Valid Settings
     # ==============
-    theProject.mainConf._backupPath = tmpPath
+    theProject.mainConf._backupPath = tstPaths.tmpDir
     theProject.data.setName("Test Minimal")
 
     # Can't make folder
@@ -752,7 +747,7 @@ def testCoreProject_Backup(monkeypatch, mockGUI, fncPath, tmpPath):
     # Test correct settings
     assert theProject.backupProject(doNotify=True) is True
 
-    theFiles = list((tmpPath / "Test Minimal").iterdir())
+    theFiles = list((tstPaths.tmpDir / "Test Minimal").iterdir())
     assert len(theFiles) == 1
 
     theZip = theFiles[0].name
@@ -760,13 +755,13 @@ def testCoreProject_Backup(monkeypatch, mockGUI, fncPath, tmpPath):
     assert theZip[-4:] == ".zip"
 
     # Extract the archive
-    with ZipFile(tmpPath / "Test Minimal" / theZip, mode="r") as inZip:
-        inZip.extractall(tmpPath / "extract")
+    with ZipFile(tstPaths.tmpDir / "Test Minimal" / theZip, mode="r") as inZip:
+        inZip.extractall(tstPaths.tmpDir / "extract")
 
     # Check that the main project file was restored
     assert cmpFiles(
         fncPath / "nwProject.nwx",
-        tmpPath / "extract" / "nwProject.nwx"
+        tstPaths.tmpDir / "extract" / "nwProject.nwx"
     )
 
 # END Test testCoreProject_Backup
diff --git a/tests/test_core/test_core_storage.py b/tests/test_core/test_core_storage.py
index 1a26ebef..877629a9 100644
--- a/tests/test_core/test_core_storage.py
+++ b/tests/test_core/test_core_storage.py
@@ -299,10 +299,10 @@ def testCoreStorage_PrepareStorage(monkeypatch, fncPath):
 
 
 @pytest.mark.core
-def testCoreStorage_ZipIt(monkeypatch, mockGUI, fncPath, tmpPath, mockRnd):
+def testCoreStorage_ZipIt(monkeypatch, mockGUI, fncPath, tstPaths, mockRnd):
     """Test making a zip archive of a project.
     """
-    zipFile = tmpPath / "project.zip"
+    zipFile = tstPaths.tmpDir / "project.zip"
 
     theProject = NWProject(mockGUI)
     storage = theProject.storage
diff --git a/tests/test_core/test_core_tree.py b/tests/test_core/test_core_tree.py
index 0a6ab099..80a6e7cc 100644
--- a/tests/test_core/test_core_tree.py
+++ b/tests/test_core/test_core_tree.py
@@ -437,7 +437,7 @@ def testCoreTree_Reorder(caplog, mockGUI, mockItems):
 
 
 @pytest.mark.core
-def testCoreTree_ToCFile(monkeypatch, mockGUI, mockItems, tmpPath):
+def testCoreTree_ToCFile(monkeypatch, tstPaths, mockGUI, mockItems):
     """Test writing the ToC.txt file.
     """
     theProject = NWProject(mockGUI)
@@ -463,20 +463,20 @@ def testCoreTree_ToCFile(monkeypatch, mockGUI, mockItems, tmpPath):
     theProject._storage._runtimePath = None
     assert theTree.writeToCFile() is False
 
-    theProject._storage._runtimePath = tmpPath
+    theProject._storage._runtimePath = tstPaths.tmpDir
     with monkeypatch.context() as mp:
         mp.setattr("builtins.open", causeOSError)
         assert theTree.writeToCFile() is False
 
-    theProject._storage._runtimePath = tmpPath
-    (tmpPath / "content").mkdir()
+    theProject._storage._runtimePath = tstPaths.tmpDir
+    (tstPaths.tmpDir / "content").mkdir()
     assert theTree.writeToCFile() is True
 
     pathA = str(Path("content") / "c000000000001.nwd")
     pathB = str(Path("content") / "c000000000002.nwd")
     pathC = str(Path("content") / "b000000000002.nwd")
 
-    assert readFile(tmpPath / nwFiles.TOC_TXT) == (
+    assert readFile(tstPaths.tmpDir / nwFiles.TOC_TXT) == (
         "\n"
         "Table of Contents\n"
         "=================\n"
diff --git a/tests/test_dialogs/test_dlg_preferences.py b/tests/test_dialogs/test_dlg_preferences.py
index ebe97b73..6a81090b 100644
--- a/tests/test_dialogs/test_dlg_preferences.py
+++ b/tests/test_dialogs/test_dlg_preferences.py
@@ -37,12 +37,9 @@ KEY_DELAY = 1
 
 
 @pytest.mark.gui
-def testDlgPreferences_Main(qtbot, monkeypatch, nwGUI, fncPath, tstPaths):
+def testDlgPreferences_Main(qtbot, monkeypatch, nwGUI, tstPaths):
     """Test the load project wizard.
     """
-    theConf = nwGUI.mainConf
-    assert theConf._confPath == fncPath
-
     monkeypatch.setattr(GuiPreferences, "exec_", lambda *a: None)
     monkeypatch.setattr(GuiPreferences, "result", lambda *a: QDialog.Accepted)
     monkeypatch.setattr(nwGUI.docEditor.spEnchant, "listDictionaries", lambda: [("en", "none")])
@@ -58,7 +55,6 @@ def testDlgPreferences_Main(qtbot, monkeypatch, nwGUI, fncPath, tstPaths):
     nwPrefs = getGuiItem("GuiPreferences")
     assert isinstance(nwPrefs, GuiPreferences)
     nwPrefs.show()
-    assert nwPrefs.mainConf._confPath == fncPath
 
     assert nwPrefs.updateTheme is False
     assert nwPrefs.updateSyntax is False
@@ -216,7 +212,7 @@ def testDlgPreferences_Main(qtbot, monkeypatch, nwGUI, fncPath, tstPaths):
     nwPrefs._doClose()
 
     assert nwGUI.mainConf.saveConfig()
-    projFile = fncPath / "novelwriter.conf"
+    projFile = tstPaths.cnfDir / "novelwriter.conf"
     testFile = tstPaths.outDir / "guiPreferences_novelwriter.conf"
     compFile = tstPaths.refDir / "guiPreferences_novelwriter.conf"
     copyfile(projFile, testFile)
diff --git a/tests/test_dialogs/test_dlg_projsettings.py b/tests/test_dialogs/test_dlg_projsettings.py
index 8d933237..c7a6c528 100644
--- a/tests/test_dialogs/test_dlg_projsettings.py
+++ b/tests/test_dialogs/test_dlg_projsettings.py
@@ -91,7 +91,7 @@ def testDlgProjSettings_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath, mockR
     # Create new project
     buildTestProject(nwGUI, projPath)
     mockRnd.reset()
-    nwGUI.mainConf.backupPath = fncPath
+    nwGUI.mainConf.setBackupPath(fncPath)
 
     # Set some values
     theProject = nwGUI.theProject
@@ -156,7 +156,7 @@ def testDlgProjSettings_StatusImport(qtbot, monkeypatch, nwGUI, fncPath, projPat
     # Create new project
     mockRnd.reset()
     buildTestProject(nwGUI, projPath)
-    nwGUI.mainConf.backupPath = fncPath
+    nwGUI.mainConf.setBackupPath(fncPath)
 
     # Set some values
     theProject = nwGUI.theProject
@@ -357,7 +357,7 @@ def testDlgProjSettings_Replace(qtbot, monkeypatch, nwGUI, fncPath, projPath, mo
     # Create new project
     mockRnd.reset()
     buildTestProject(nwGUI, projPath)
-    nwGUI.mainConf.backupPath = fncPath
+    nwGUI.mainConf.setBackupPath(fncPath)
 
     # Set some values
     theProject = nwGUI.theProject
diff --git a/tests/test_gui/test_gui_i18n.py b/tests/test_gui/test_gui_i18n.py
index b514001c..8c9cb849 100644
--- a/tests/test_gui/test_gui_i18n.py
+++ b/tests/test_gui/test_gui_i18n.py
@@ -20,20 +20,20 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
 import sys
-import novelwriter
-
 import pytest
 
 from PyQt5.QtWidgets import qApp, QMessageBox
 
-LANG_DATA = novelwriter.CONFIG.listLanguages(novelwriter.CONFIG.LANG_NW)
+from novelwriter import CONFIG, main
+
+LANG_DATA = CONFIG.listLanguages(CONFIG.LANG_NW)
 
 
 @pytest.mark.gui
 @pytest.mark.skipif(not sys.platform.startswith("linux"), reason="Linux Only")
 @pytest.mark.skipif(not LANG_DATA, reason="No i18n Data")
 @pytest.mark.parametrize("language", [a for a, b in LANG_DATA])
-def testI18n_Localisation(qtbot, monkeypatch, language, fncPath, fncConf):
+def testI18n_Localisation(qtbot, monkeypatch, language, fncPath):
     """test loading the gui with a specific language.
     """
     monkeypatch.setattr(QMessageBox, "warning", lambda *a: QMessageBox.Ok)
@@ -42,18 +42,13 @@ def testI18n_Localisation(qtbot, monkeypatch, language, fncPath, fncConf):
     monkeypatch.setattr(QMessageBox, "question", lambda *a: QMessageBox.Yes)
 
     # Set the test langauge
-    monkeypatch.setattr("novelwriter.CONFIG", fncConf)
-    fncConf.guiLocale = language
-    fncConf.initLocalisation(qApp)
+    CONFIG.guiLocale = language
+    CONFIG.initLocalisation(qApp)
 
-    nwGUI = novelwriter.main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
+    nwGUI = main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
     qtbot.addWidget(nwGUI)
     nwGUI.show()
     qtbot.wait(20)
     nwGUI.closeMain()
 
-    # Reset the app language
-    fncConf.guiLocale = "en_GB"
-    fncConf.initLocalisation(qApp)
-
 # END Test testI18n_Localisation
diff --git a/tests/test_gui/test_gui_theme.py b/tests/test_gui/test_gui_theme.py
index 9899c1c1..a4aa6b2a 100644
--- a/tests/test_gui/test_gui_theme.py
+++ b/tests/test_gui/test_gui_theme.py
@@ -19,7 +19,6 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-import shutil
 import pytest
 
 from pathlib import Path
@@ -31,18 +30,17 @@ from tools import writeFile
 from PyQt5.QtGui import QIcon, QPalette, QPixmap
 from PyQt5.QtWidgets import QApplication
 
+from novelwriter import CONFIG
 from novelwriter.enum import nwItemClass, nwItemLayout, nwItemType
-from novelwriter.config import Config
 from novelwriter.constants import nwLabels
 from novelwriter.gui.theme import GuiIcons, GuiTheme
 
 
 @pytest.mark.gui
-def testGuiTheme_Main(qtbot, nwGUI, fncPath):
+def testGuiTheme_Main(qtbot, nwGUI, tstPaths):
     """Test the theme class init.
     """
     mainTheme: GuiTheme = nwGUI.mainTheme
-    mainConf: Config = nwGUI.mainConf
 
     # Methods
     # =======
@@ -55,35 +53,35 @@ def testGuiTheme_Main(qtbot, nwGUI, fncPath):
     # ==========
 
     # The defaults should be set
-    defaultFont = mainConf.guiFont
-    defaultSize = mainConf.guiFontSize
+    defaultFont = CONFIG.guiFont
+    defaultSize = CONFIG.guiFontSize
 
     # CHange them to nonsense values
-    mainConf.guiFont = "notafont"
-    mainConf.guiFontSize = 99
+    CONFIG.guiFont = "notafont"
+    CONFIG.guiFontSize = 99
 
     # Let the theme class set them back to default
     mainTheme._setGuiFont()
-    assert mainConf.guiFont == defaultFont
-    assert mainConf.guiFontSize == defaultSize
+    assert CONFIG.guiFont == defaultFont
+    assert CONFIG.guiFontSize == defaultSize
 
     # A second call should just restore the defaults again
     mainTheme._setGuiFont()
-    assert mainConf.guiFont == defaultFont
-    assert mainConf.guiFontSize == defaultSize
+    assert CONFIG.guiFont == defaultFont
+    assert CONFIG.guiFontSize == defaultSize
 
     # Scan for Themes
     # ===============
 
     assert mainTheme._listConf({}, Path("not_a_path")) is False
 
-    themeOne = fncPath / "themes" / "themeone.conf"
-    themeTwo = fncPath / "themes" / "themetwo.conf"
+    themeOne = tstPaths.cnfDir / "themes" / "themeone.conf"
+    themeTwo = tstPaths.cnfDir / "themes" / "themetwo.conf"
     writeFile(themeOne, "# Stuff")
     writeFile(themeTwo, "# Stuff")
 
     result = {}
-    assert mainTheme._listConf(result, fncPath / "themes") is True
+    assert mainTheme._listConf(result, tstPaths.cnfDir / "themes") is True
     assert result["themeone"] == themeOne
     assert result["themetwo"] == themeTwo
 
@@ -123,18 +121,14 @@ def testGuiTheme_Main(qtbot, nwGUI, fncPath):
 
 
 @pytest.mark.gui
-def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncPath):
+def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI):
     """Test the theme part of the class.
     """
     mainTheme: GuiTheme = nwGUI.mainTheme
-    mainConf: Config = nwGUI.mainConf
 
     # List Themes
     # ===========
 
-    shutil.copy(mainConf.assetPath("themes") / "default_dark.conf", fncPath / "themes")
-    shutil.copy(mainConf.assetPath("themes") / "default.conf", fncPath / "themes")
-
     # Block the reading of the files
     with monkeypatch.context() as mp:
         mp.setattr("builtins.open", causeOSError)
@@ -149,14 +143,14 @@ def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncPath):
     assert mainTheme.listThemes() == mainTheme._themeList
 
     # Check handling of broken theme settings
-    mainConf.guiTheme = "not_a_theme"
+    CONFIG.guiTheme = "not_a_theme"
     availThemes = mainTheme._availThemes
     mainTheme._availThemes = {}
     assert mainTheme.loadTheme() is False
     mainTheme._availThemes = availThemes
 
     # Check handling of unreadable file
-    mainConf.guiTheme = "default"
+    CONFIG.guiTheme = "default"
     with monkeypatch.context() as mp:
         mp.setattr("builtins.open", causeOSError)
         assert mainTheme.loadTheme() is False
@@ -168,7 +162,7 @@ def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncPath):
     mainTheme._guiPalette.color(QPalette.Window).setRgb(0, 0, 0, 0)
 
     # Load the default theme
-    mainConf.guiTheme = "default"
+    CONFIG.guiTheme = "default"
     assert mainTheme.loadTheme() is True
 
     # This should load a standard palette
@@ -178,7 +172,7 @@ def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncPath):
     # Load Default Dark Theme
     # =======================
 
-    mainConf.guiTheme = "default_dark"
+    CONFIG.guiTheme = "default_dark"
     assert mainTheme.loadTheme() is True
 
     # Check a few values
@@ -193,18 +187,14 @@ def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncPath):
 
 
 @pytest.mark.gui
-def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncPath):
+def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI):
     """Test the syntax part of the class.
     """
     mainTheme: GuiTheme = nwGUI.mainTheme
-    mainConf: Config = nwGUI.mainConf
 
     # List Themes
     # ===========
 
-    shutil.copy(mainConf.assetPath("syntax") / "default_dark.conf", fncPath / "syntax")
-    shutil.copy(mainConf.assetPath("syntax") / "default_light.conf", fncPath / "syntax")
-
     # Block the reading of the files
     with monkeypatch.context() as mp:
         mp.setattr("builtins.open", causeOSError)
@@ -221,12 +211,12 @@ def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncPath):
     # Check handling of broken theme settings
     availSyntax = mainTheme._availSyntax
     mainTheme._availSyntax = {}
-    mainConf.guiSyntax = "not_a_syntax"
+    CONFIG.guiSyntax = "not_a_syntax"
     assert mainTheme.loadSyntax() is False
     mainTheme._availSyntax = availSyntax
 
     # Check handling of unreadable file
-    mainConf.guiSyntax = "default_light"
+    CONFIG.guiSyntax = "default_light"
     with monkeypatch.context() as mp:
         mp.setattr("builtins.open", causeOSError)
         assert mainTheme.loadSyntax() is False
@@ -235,7 +225,7 @@ def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncPath):
     # =========================
 
     # Load the default syntax
-    mainConf.guiSyntax = "default_light"
+    CONFIG.guiSyntax = "default_light"
     assert mainTheme.loadSyntax() is True
 
     # Check some values
@@ -248,7 +238,7 @@ def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncPath):
     # =======================
 
     # Load the default syntax
-    mainConf.guiSyntax = "default_dark"
+    CONFIG.guiSyntax = "default_dark"
     assert mainTheme.loadSyntax() is True
 
     # Check some values
@@ -263,7 +253,7 @@ def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncPath):
 
 
 @pytest.mark.gui
-def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncPath):
+def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, tstPaths):
     """Test the icon cache class.
     """
     iconCache: GuiIcons = nwGUI.mainTheme.iconCache
@@ -280,7 +270,7 @@ def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncPath):
         assert iconCache.loadTheme("typicons_dark") is False
 
     # Load a broken theme file
-    iconsDir = fncPath / "icons"
+    iconsDir = tstPaths.cnfDir / "icons"
     testIcons = iconsDir / "testicons"
     testIcons.mkdir()
     writeFile(testIcons / "icons.conf", (
@@ -293,7 +283,7 @@ def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncPath):
     ))
 
     iconPath = iconCache._iconPath
-    iconCache._iconPath = fncPath / "icons"
+    iconCache._iconPath = tstPaths.cnfDir / "icons"
 
     caplog.clear()
     assert iconCache.loadTheme("testicons") is True
diff --git a/tests/test_tools/test_tools_writingstats.py b/tests/test_tools/test_tools_writingstats.py
index 895635fd..7cf832f6 100644
--- a/tests/test_tools/test_tools_writingstats.py
+++ b/tests/test_tools/test_tools_writingstats.py
@@ -33,7 +33,7 @@ from novelwriter.tools.writingstats import GuiWritingStats
 
 
 @pytest.mark.gui
-def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
+def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, projPath, tstPaths):
     """Test the full writing stats tool.
     """
     # Create a project to work on
@@ -126,13 +126,10 @@ def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
     assert sessLog.listBox.topLevelItem(7).text(sessLog.C_COUNT) == "{:n}".format(200)
 
     assert sessLog._saveData(sessLog.FMT_CSV)
-    qtbot.wait(100)
-
     assert sessLog._saveData(sessLog.FMT_JSON)
-    qtbot.wait(100)
 
     # Check the exported files
-    jsonStats = fncPath / "sessionStats.json"
+    jsonStats = tstPaths.tmpDir / "sessionStats.json"
     with open(jsonStats, mode="r", encoding="utf-8") as inFile:
         jsonData = json.load(inFile)
 
@@ -171,7 +168,7 @@ def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
     qtbot.mouseClick(sessLog.incNovel, Qt.LeftButton)
     assert sessLog._saveData(sessLog.FMT_JSON)
 
-    jsonStats = fncPath / "sessionStats.json"
+    jsonStats = tstPaths.tmpDir / "sessionStats.json"
     with open(jsonStats, mode="r", encoding="utf-8") as inFile:
         jsonData = json.loads(inFile.read())
 
@@ -217,7 +214,7 @@ def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
     qtbot.mouseClick(sessLog.incNotes, Qt.LeftButton)
     assert sessLog._saveData(sessLog.FMT_JSON)
 
-    jsonStats = fncPath / "sessionStats.json"
+    jsonStats = tstPaths.tmpDir / "sessionStats.json"
     with open(jsonStats, mode="r", encoding="utf-8") as inFile:
         jsonData = json.load(inFile)
 
@@ -265,7 +262,7 @@ def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
 
     # qtbot.stop()
 
-    jsonStats = fncPath / "sessionStats.json"
+    jsonStats = tstPaths.tmpDir / "sessionStats.json"
     with open(jsonStats, mode="r", encoding="utf-8") as inFile:
         jsonData = json.load(inFile)
 
@@ -295,7 +292,7 @@ def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
     qtbot.mouseClick(sessLog.hideZeros, Qt.LeftButton)
     assert sessLog._saveData(sessLog.FMT_JSON)
 
-    jsonStats = fncPath / "sessionStats.json"
+    jsonStats = tstPaths.tmpDir / "sessionStats.json"
     with open(jsonStats, mode="r", encoding="utf-8") as inFile:
         jsonData = json.load(inFile)
 
@@ -348,7 +345,7 @@ def testToolWritingStats_Main(qtbot, monkeypatch, nwGUI, fncPath, projPath):
     qtbot.mouseClick(sessLog.groupByDay, Qt.LeftButton)
     assert sessLog._saveData(sessLog.FMT_JSON)
 
-    jsonStats = fncPath / "sessionStats.json"
+    jsonStats = tstPaths.tmpDir / "sessionStats.json"
     with open(jsonStats, mode="r", encoding="utf-8") as inFile:
         jsonData = json.load(inFile)