diff --git a/dzgui/api/shortcuts.py b/dzgui/api/shortcuts.py
index 144bb44..2ecb076 100644
--- a/dzgui/api/shortcuts.py
+++ b/dzgui/api/shortcuts.py
@@ -10,7 +10,7 @@ from pathlib import Path
 from typing import Any
 
 from dzgui.api.steam import find_user_id_32
-from dzgui.const.constants import APP_NAME, APP_NAME_LOWER, GTK_APP_ID, IMAGES_PATH
+from dzgui.const.constants import APP_NAME, APP_NAME_LOWER, IMAGES_PATH
 from dzgui.util.dirs import copy_dzgui_to_xdg_data, make_parents
 from dzgui.util.strings import unknown
 
@@ -158,7 +158,7 @@ class Shortcuts:
         NEW_ENTRY["DevkitGameID"] = ""
         NEW_ENTRY["DevkitOverrideAppID"] = 0
         NEW_ENTRY["LastPlayTime"] = 0
-        NEW_ENTRY["FlatpakAppID"] = GTK_APP_ID
+        NEW_ENTRY["FlatpakAppID"] = ""
 
         NEW_ENTRY["sortas"] = ""
         NEW_ENTRY["tags"] = {}
diff --git a/dzgui/api/steam.py b/dzgui/api/steam.py
index 7253d1c..2580bd0 100644
--- a/dzgui/api/steam.py
+++ b/dzgui/api/steam.py
@@ -13,6 +13,7 @@ from warnings import deprecated
 
 from dzgui.api.acf import ACF
 from dzgui.init.prereqs import has_any_client
+from dzgui.init.proc import has_cmd
 from dzgui.const.constants import (
     APPID_DAYZ,
     APPID_DAYZ_EXP,
@@ -22,10 +23,12 @@ from dzgui.const.constants import (
     DEBIAN_STEAM_PATH,
     DEFAULT_STEAM_PATH,
     DOWNLOADS_PATH,
+    FLATPAK_CMD,
     FLATPAK_STEAM_PATH,
     LIBRARYFOLDERS_PATH,
-    UBUNTU_STEAM_PATH,
     REQUEST_TIMEOUT,
+    STEAM_CMD,
+    UBUNTU_STEAM_PATH,
     VDF_PATH,
 )
 from dzgui.const.endpoints import (
@@ -82,6 +85,10 @@ def get_steam_paths() -> list[tuple[Path, str]]:
         }
 
         for path in DEFAULT_PATH, FLATPAK_PATH, UBUNTU_PATH, DEBIAN_PATH:
+            if path is FLATPAK_PATH and has_cmd(FLATPAK_CMD) is False:
+                continue
+            if path is not FLATPAK_PATH and has_cmd(STEAM_CMD) is False:
+                continue
             if path.joinpath(VDF_PATH).is_file():
                 paths.append((path, human[path]))
     return paths
@@ -198,6 +205,7 @@ def load_to_menu(client: str, appid: int, name: str, mods: list[str]) -> int:
     """Loads to the menu screen with the selected mods; used for AFK/pre-joining"""
     concat = concat_mods(mods)
     client_args = concat_bash_args(client)
+    logger.debug(f"Setting client arguments to: {client_args}")
     params = [
         "-applaunch",
         str(appid),
diff --git a/dzgui/app_init.py b/dzgui/app_init.py
index 26df94d..dbd01ea 100644
--- a/dzgui/app_init.py
+++ b/dzgui/app_init.py
@@ -7,7 +7,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 
 
-from dzgui.const.constants import APP_NAME, APP_NAME_LOWER, STEAM_ICON, ICONS_PATH
+from dzgui.const.constants import APP_NAME, APP_NAME_LOWER,  FLATPAK_ROOT_PATH, ICONS_PATH
 from dzgui.const.enum import Preferences
 from dzgui.config.query import lookup
 from dzgui.config.userprefs import UserPrefs
@@ -18,7 +18,7 @@ from dzgui.init.migrate import (
     migrate_cols_file,
 )
 from dzgui.init.flock import lock_acquire
-from dzgui.init.prereqs import has_any_client
+from dzgui.init.prereqs import has_flatpak_client, has_steam_client
 from dzgui.strings import boot
 
 from dzgui.util.deck import is_steam_deck, is_game_mode
@@ -142,7 +142,7 @@ def load_gui(version: str, is_debug: bool) -> None:
         migrate_cols_file(XDG.columns)
         copy_state_files(xdg_paths["XDG_STATE_HOME"])
         # TODO: add logging inside wizard
-        wizard = SetupWizard(_is_steam_deck, XDG)
+        wizard = SetupWizard(_is_steam_deck, XDG, xdg_paths)
 
         if not wizard.is_setup_complete():
             return
@@ -155,7 +155,11 @@ def load_gui(version: str, is_debug: bool) -> None:
         # TODO: sudo escalation dialog
         # count = get_map_count()
         # TODO: move into module
-        if has_any_client() is False:
+        if FLATPAK_ROOT_PATH in lookup(XDG.config, Preferences.DEFAULT):
+            has_client = has_flatpak_client()
+        else:
+            has_client = has_steam_client()
+        if has_client is False:
             EarlyAlertDialog(init.requires_steam)
 
     bootwin = BootWindow(XDG, version)
diff --git a/dzgui/config/xdg.py b/dzgui/config/xdg.py
index 47f747a..1d7f5b3 100644
--- a/dzgui/config/xdg.py
+++ b/dzgui/config/xdg.py
@@ -3,7 +3,13 @@ import os
 from pathlib import Path
 from dataclasses import dataclass
 
-from dzgui.const.constants import APP_NAME_LOWER, DEBUG_LOG, SYSTEM_LOG
+from dzgui.const.constants import (
+    APP_NAME_LOWER,
+    DEBUG_LOG,
+    FLATPAK_ROOT_PATH,
+    SYSTEM_LOG,
+)
+from dzgui.init.proc import is_sandboxed
 
 
 @dataclass
@@ -53,10 +59,12 @@ def get_xdg_paths() -> dict:
         "XDG_DATA_HOME": home / ".local" / "share",
         "XDG_CACHE_HOME": home / ".cache",
     }
-
     resolved_paths = {}
     for path in xdg_paths:
         real_path = os.environ.get(path)
+        if real_path is not None and is_sandboxed():
+            search_string = FLATPAK_ROOT_PATH + "/"
+            real_path = real_path.replace(search_string, "")
         if real_path is not None and is_writeable(real_path):
             new_path = Path(real_path)
         else:
diff --git a/dzgui/init/proc.py b/dzgui/init/proc.py
index 3d76516..0c1a2a0 100644
--- a/dzgui/init/proc.py
+++ b/dzgui/init/proc.py
@@ -1,7 +1,8 @@
-import psutil
-import subprocess
-import shutil
 import logging
+import os
+import psutil
+import shutil
+import subprocess
 
 from dzgui.const.constants import (
     APP_NAME,
@@ -26,7 +27,13 @@ def is_steam_running(cmd: str) -> bool:
         raise TypeError("Not a valid Steam client selection")
 
 
+def is_sandboxed() -> bool:
+    return bool(os.environ.get("FLATPAK_ID"))
+
+
 def is_flatpak_steam_running() -> bool:
+    if is_sandboxed():
+        return True
     if has_cmd(FLATPAK_CMD) is False:
         return False
     proc = subprocess.check_output(
diff --git a/dzgui/strings/wizard.py b/dzgui/strings/wizard.py
index 9f499b0..de83762 100644
--- a/dzgui/strings/wizard.py
+++ b/dzgui/strings/wizard.py
@@ -3,6 +3,8 @@ title_intro = "Welcome"
 blurb_intro = """
 This wizard will help you set up some common config options before launching the application.
 """
+error_sandbox = "Setup cannot be run from inside Flatpak sandbox.\nPlease launch the application directly."
+welcome = "Welcome to {0}!"
 
 ### SteamPathPage
 heading_steam_path = "Steam path"
@@ -17,7 +19,7 @@ desc_flatpak_path = (
 desc_ubuntu_path = "This is the default Steam path on <b>Ubuntu-based systems</b>."
 desc_debian_path = "This is the default Steam path on <b>Debian-based systems</b>."
 no_valid_paths = (
-    "No valid Steam paths found on system. Please install Steam to continue."
+    "No valid Steam path or Steam command found on system. Please install Steam to continue."
 )
 button_scan = "Scan for Steam"
 
@@ -80,6 +82,17 @@ checkbox_start_menu = (
 )
 checkbox_desktop_shortcut = ("Add a desktop shortcut", "Depends on the option above.")
 
+### Flatpak page
+heading_flatpak = "Flatpak sandbox overrides"
+blurb_flatpak = (
+    "You chose to add a shortcut directly to Flatpak Steam. "
+    "To launch DZGUI from Flatpak's sandbox, you must grant "
+    "permission to read from and write to the following locations."
+)
+tree_column = "Paths"
+overrides_applied = "Overrides applied."
+button_flatpak = "Grant permissions"
+
 ### Completion page
 heading_completion = "Setup complete"
 blurb_completion = "Configuration completed successfully. Click 'Close' to close this dialog and launch DZGUI."
diff --git a/dzgui/util/bash.py b/dzgui/util/bash.py
index 9c2a73d..d612b94 100644
--- a/dzgui/util/bash.py
+++ b/dzgui/util/bash.py
@@ -1,5 +1,12 @@
 import shlex
 
+from dzgui.const.constants import STEAM_CMD
+from dzgui.init.proc import is_sandboxed
+
 
 def concat_bash_args(command: str) -> list[str]:
+    # NOTE: NSGs spawned from sandbox cannot access host application commands,
+    # so fallback to Steam internal URIs
+    if is_sandboxed():
+        return [STEAM_CMD]
     return shlex.split(command)
diff --git a/dzgui/util/flatpak.py b/dzgui/util/flatpak.py
new file mode 100644
index 0000000..a432970
--- /dev/null
+++ b/dzgui/util/flatpak.py
@@ -0,0 +1,31 @@
+import logging
+import subprocess
+
+from dzgui.const.constants import APP_NAME, FLATPAK_APPID, GTK_APP_ID
+
+logger = logging.getLogger(APP_NAME)
+
+
+def apply_overrides(xdg: dict[str, str]) -> None:
+    try:
+        # NOTE: D-Bus registration required for sandbox
+        args = [
+            "flatpak",
+            "--user",
+            "override",
+            f"--own-name={GTK_APP_ID}",
+            FLATPAK_APPID,
+        ]
+        subprocess.run([*args], capture_output=True)
+
+        for path in xdg.values():
+            args = [
+                "flatpak",
+                "--user",
+                "override",
+                f"--filesystem={path}",
+                FLATPAK_APPID,
+            ]
+            subprocess.run([*args], capture_output=True)
+    except Exception as e:
+        logger.critical(e)
diff --git a/dzgui/util/strings.py b/dzgui/util/strings.py
index 30a7fc6..91c41ea 100644
--- a/dzgui/util/strings.py
+++ b/dzgui/util/strings.py
@@ -297,7 +297,7 @@ class Options:
 init = Init(
     is_steam_running="Is Steam running? DZGUI must be run on top of Steam.",
     is_dayz_running="Is DayZ already running? DZGUI cannot launch DayZ if another process is using it.",
-    requires_steam="DZGUI requires that Steam or Flatpak Steam be installed on the system.",
+    requires_steam="Your chosen client (Steam/Flatpak Steam) must be installed on the system.",
 )
 
 mod_panel = ModPanelStrings(
diff --git a/dzgui/views/dialogs/wizard.py b/dzgui/views/dialogs/wizard.py
index b3e54f4..1c12d40 100644
--- a/dzgui/views/dialogs/wizard.py
+++ b/dzgui/views/dialogs/wizard.py
@@ -12,22 +12,24 @@ from dzgui.const.constants import (
     APP_NAME,
     APP_NAME_LOWER,
     HERO_PATH,
-    FLATPAK_STEAM_PATH,
+    FLATPAK_ROOT_PATH,
     LEGACY_CONFIG_PATH,
 )
 from dzgui.const.boilerplate import config_boilerplate
 from dzgui.const.endpoints import STEAM_API_SETUP
 from dzgui.config import freedesktop
-from dzgui.init.proc import path_to_steam_cmd
+from dzgui.init.proc import is_sandboxed, path_to_steam_cmd
 from dzgui.init.migrate import migrate_legacy_conf
 from dzgui.managers.threading import call_on_thread, StoredFunc, ThreadingManager
 from dzgui.strings import wizard
 from dzgui.util._json import write_json
+from dzgui.util.flatpak import apply_overrides
 from dzgui.util.open_links import open_link_by_url
 from dzgui.util.css import add_class, load_css
 from dzgui.views.components.buttons import WebButton
 from dzgui.views.components.entry import APIEntry
 from dzgui.views.mixins.colorscheme import ColorAwareApp
+from dzgui.views.trees.tree_simple import SimpleTree
 
 import gi
 
@@ -45,7 +47,8 @@ class PageNum(Enum):
     STEAM_API = 4
     USER_PREFS = 5
     SHORTCUTS = 6
-    FINAL = 7
+    FLATPAK = 7
+    FINAL = 8
 
 
 class OptionalPageMixin:
@@ -144,7 +147,7 @@ class NotificationFrame(Gtk.Frame):
             margin_start=50,
             margin_end=50,
         )
-        wrapped = textwrap.fill(label, width=80)
+        wrapped = textwrap.fill(label, width=60)
         self.label = Gtk.Label(
             label=wrapped,
             justify=Gtk.Justification.CENTER,
@@ -158,7 +161,7 @@ class NotificationFrame(Gtk.Frame):
             add_class(self, "error-frame")
 
     def set_text(self, text: str) -> None:
-        wrapped = textwrap.fill(text, width=80)
+        wrapped = textwrap.fill(text, width=60)
         self.label.set_markup(wrapped)
 
 
@@ -243,12 +246,23 @@ class IntroductionPage(EnumeratedWizardPage):
     def __init__(self) -> None:
         super().__init__(
             enum=PageNum.INTRO,
-            heading=f"Welcome to {APP_NAME}!",
+            heading=wizard.welcome.format(APP_NAME),
             description=wizard.blurb_intro,
         )
         self.page_type = Gtk.AssistantPageType.INTRO
         self.set_title(wizard.title_intro)
 
+        self.error_box = NotificationFrame(wizard.error_sandbox, error=True)
+        self.add_start(self.error_box)
+
+        self.connect("map", self._on_map)
+
+    def _on_map(self, page: "EnumeratedWizardPage") -> None:
+        self.error_box.hide()
+        if is_sandboxed():
+            self.error_box.show()
+            EMITTER.emit("step_pending")
+
 
 class Heading(Gtk.Label):
     def __init__(self, label: str):
@@ -405,6 +419,42 @@ class PreferencesPage(EnumeratedWizardPage):
         EMITTER.emit("step_complete")
 
 
+class FlatpakOverridePage(EnumeratedWizardPage):
+    def __init__(self, xdg_paths: dict[str, str]) -> None:
+        super().__init__(
+            enum=PageNum.FLATPAK,
+            heading=wizard.heading_flatpak,
+            description=wizard.blurb_flatpak,
+        )
+        self.xdg_paths = xdg_paths
+        self.page_type = Gtk.AssistantPageType.INTRO
+
+        store = Gtk.ListStore(str)
+        for path in xdg_paths.values():
+            store.append((str(path),))
+        tree = SimpleTree(store, wizard.tree_column)
+        tree.set_halign(Gtk.Align.CENTER)
+
+        self.authorize_button = Gtk.Button(
+            label=wizard.button_flatpak, halign=Gtk.Align.CENTER
+        )
+        self.authorize_button.connect("clicked", self._on_authorize)
+
+        self.notice = NotificationFrame(wizard.overrides_applied)
+        self.connect("map", self._on_map)
+
+        for el in tree, self.authorize_button, self.notice:
+            self.add_start(el)
+
+    def _on_map(self, page: "EnumeratedWizardPage") -> None:
+        self.notice.hide()
+
+    def _on_authorize(self, button: Gtk.Button) -> None:
+        apply_overrides(self.xdg_paths)
+        self.notice.show()
+        EMITTER.emit("step_complete")
+
+
 class CompletionPage(EnumeratedWizardPage):
     def __init__(self) -> None:
         super().__init__(
@@ -418,7 +468,7 @@ class CompletionPage(EnumeratedWizardPage):
 
 
 class Assistant(Gtk.Assistant):
-    def __init__(self, is_deck: bool, XDG: "Xdg"):
+    def __init__(self, is_deck: bool, XDG: "Xdg", xdg_paths: dict[str, str]):
         super().__init__()
         if is_deck:
             # NOTE: deemed to be "safe" dimensions that exclude taskbar size
@@ -437,6 +487,7 @@ class Assistant(Gtk.Assistant):
         self.page_api = SteamValidationPage()
         self.page_prefs = PreferencesPage()
         self.page_shortcuts = ShortcutCreationPage(XDG.shortcut)
+        self.page_flatpak = FlatpakOverridePage(xdg_paths)
         self.page_completion = CompletionPage()
 
         self.set_forward_page_func(self._advance_page)
@@ -456,6 +507,7 @@ class Assistant(Gtk.Assistant):
             self.page_api,
             self.page_prefs,
             self.page_shortcuts,
+            self.page_flatpak,
             self.page_completion,
         ):
             # NOTE: skip config migration page if no legacy config file
@@ -476,7 +528,10 @@ class Assistant(Gtk.Assistant):
     def write_config(self, config: dict[str, Any]) -> None:
         write_json(config, self.config_path)
 
-    def get_final_page(self) -> int:
+    def get_completion_page(self) -> int:
+        return self.pages[self.page_completion]
+
+    def get_shortcut_page(self) -> int:
         return self.pages[self.page_shortcuts]
 
     def _advance_page(self, index: int) -> int:
@@ -489,7 +544,7 @@ class Assistant(Gtk.Assistant):
                     sp = page.migrated_conf["default_steam_path"]
                     self.page_shortcuts.set_steam_path(sp)
                     self.config_values = self.page_migration.migrated_conf
-                    return self.get_final_page()
+                    return self.get_shortcut_page()
             case SteamPathPage():
                 path = page.get_path_from_radio()
                 self.config_values["default_steam_path"] = path
@@ -506,10 +561,22 @@ class Assistant(Gtk.Assistant):
                 )
             case ShortcutCreationPage():
                 page.create_shortcuts()
+                if not self.needs_flatpak_override():
+                    return self.get_completion_page()
+            case FlatpakOverridePage():
+                pass
             case _:
                 raise AttributeError("Trying to advance a non-canonical page")
         return index + 1
 
+    def needs_flatpak_override(self) -> bool:
+        if (
+            self.page_shortcuts.is_steam_checkbox_active()
+            and FLATPAK_ROOT_PATH in self.config_values["default_steam_path"]
+        ):
+            return True
+        return False
+
     def is_setup_complete(self) -> bool:
         return self.setup_complete
 
@@ -625,12 +692,6 @@ class ShortcutCreationPage(OptionalPageMixin, EnumeratedWizardPage):  # type: ig
         self.add_start(self.checks_area)
         self.show_all()
         self.connect("map", self._on_map)
-        self.connect("map", self._toggle_checkbox)
-
-    def _toggle_checkbox(self, page: "EnumeratedWizardPage") -> None:
-        if FLATPAK_STEAM_PATH in str(self.steam_path):
-            self.steam_checkbox.set_active(False)
-            self.steam_checkbox.set_sensitive(False)
 
     def _on_start_menu_toggled(self, button: Gtk.CheckButton) -> None:
         state = button.get_active()
@@ -641,6 +702,9 @@ class ShortcutCreationPage(OptionalPageMixin, EnumeratedWizardPage):  # type: ig
     def set_steam_path(self, path: Path) -> None:
         self.steam_path = path
 
+    def is_steam_checkbox_active(self) -> bool:
+        return self.steam_checkbox.get_active()
+
     def create_shortcuts(self) -> None:
         # NOTE: best-effort, permissive even on failure (page is already marked as complete)
         if self.steam_checkbox.get_active():
@@ -709,10 +773,10 @@ class SteamPathPage(EnumeratedWizardPage):
 
 
 class SetupWizard(ColorAwareApp, Gtk.Application):  # type: ignore
-    def __init__(self, is_deck: bool, XDG: "Xdg") -> None:
+    def __init__(self, is_deck: bool, XDG: "Xdg", xdg_paths: dict[str, str]) -> None:
         super().__init__()
         GLib.set_prgname(APP_NAME)
-        self.win = Window(is_deck, XDG)
+        self.win = Window(is_deck, XDG, xdg_paths)
         Gtk.main()
 
     def is_setup_complete(self) -> int:
@@ -720,9 +784,9 @@ class SetupWizard(ColorAwareApp, Gtk.Application):  # type: ignore
 
 
 class Window(Gtk.Window):
-    def __init__(self, is_deck: bool, XDG: "Xdg") -> None:
+    def __init__(self, is_deck: bool, XDG: "Xdg", xdg_paths: dict[str, str]) -> None:
         super().__init__(title=APP_NAME, icon_name=APP_NAME)
-        self.assistant = Assistant(is_deck, XDG)
+        self.assistant = Assistant(is_deck, XDG, xdg_paths)
 
 
 class Emitter(GObject.GObject):
diff --git a/dzgui/views/pages/options.py b/dzgui/views/pages/options.py
index 64c5d51..ebce129 100644
--- a/dzgui/views/pages/options.py
+++ b/dzgui/views/pages/options.py
@@ -266,7 +266,6 @@ class FlatpakToggleField(ToggleField):
 
     def _on_radio_toggled(self, button: Gtk.RadioButton, context: Preferences) -> None:
         cmd = FLATPAK_RUN_CMD if self.radio1.get_active() else FLATPAK_SANDBOX
-        print(context)
         self.controller.update_config(context, cmd)
 
 
diff --git a/dzgui/views/trees/tree_simple.py b/dzgui/views/trees/tree_simple.py
new file mode 100644
index 0000000..be96668
--- /dev/null
+++ b/dzgui/views/trees/tree_simple.py
@@ -0,0 +1,35 @@
+from typing import TYPE_CHECKING, Union
+
+if TYPE_CHECKING:
+    from dzgui.model.model_factory import FastInsertListStore
+
+import gi
+
+gi.require_version("Gtk", "3.0")
+from gi.repository import Gtk  # noqa
+
+
+class SimpleTree(Gtk.ScrolledWindow):
+    """Simple scrollable 1-column tree"""
+
+    def __init__(
+        self, model: Union[Gtk.ListStore, "FastInsertListStore"], title: str
+    ) -> None:
+        super().__init__(
+            overlay_scrolling=False,
+            propagate_natural_width=True,
+            propagate_natural_height=True,
+        )
+
+        self.tree = Gtk.TreeView(model=model, enable_search=False)
+        renderer = Gtk.CellRendererText()
+        column = Gtk.TreeViewColumn(title, renderer, text=0)
+        column.set_sizing(Gtk.TreeViewColumnSizing.FIXED)
+        column.set_resizable(False)
+        column.set_sort_column_id(0)
+        self.tree.append_column(column)
+
+        self.add(self.tree)
+
+    def get_tree(self) -> Gtk.TreeView:
+        return self.tree
diff --git a/pyproject.toml b/pyproject.toml
index 1d52faa..b7a9729 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -110,10 +110,11 @@ config-settings-package = { pygobject-stubs = { config = "Gtk3,Gdk3,Soup2" } }
 markers = [
     "apitest: checks remote endpoints",
     "config: config file keys/values",
-    "realconfig: depends on actual generated local config file",
+    "flatpak: depends on local flatpak installation",
     "mods: tests mod metadata/link creation",
     "pefile: validate PE files",
     "post_install: requires a completed installation",
+    "realconfig: depends on actual generated local config file",
     "redact: log redaction mechanisms",
     "slow: long-running tests",
     "webtest: depends on remote endpoint",
diff --git a/tests/test_flatpak_override.py b/tests/test_flatpak_override.py
new file mode 100644
index 0000000..d34307d
--- /dev/null
+++ b/tests/test_flatpak_override.py
@@ -0,0 +1,43 @@
+import configparser
+import pytest
+
+from dzgui.const.constants import FLATPAK_APPID, GTK_APP_ID
+from dzgui.config.xdg import get_xdg_paths
+from dzgui.util.flatpak import apply_overrides
+
+PATHS_KEY = "Context"
+PATHS_SUBKEY = "filesystems"
+BUS_KEY = "Session Bus Policy"
+
+pytestmark = pytest.mark.flatpak
+
+
+@pytest.fixture
+def xdg_paths() -> dict[str, str]:
+    return get_xdg_paths()
+
+
+@pytest.fixture
+def override(xdg_paths) -> None:
+    apply_overrides(xdg_paths)
+
+
+@pytest.fixture
+def config(xdg_paths) -> configparser.ConfigParser:
+    conf_path = xdg_paths["XDG_DATA_HOME"].parent.joinpath(
+        f"flatpak/overrides/{FLATPAK_APPID}"
+    )
+    config = configparser.ConfigParser()
+    config.read(conf_path)
+    return config
+
+
+def test_session_bus(override, config) -> None:
+    bus = config[BUS_KEY][GTK_APP_ID]
+    assert bus == "own"
+
+
+def test_paths(override, xdg_paths, config) -> None:
+    expect = xdg_paths
+    paths = config[PATHS_KEY][PATHS_SUBKEY].split(";")
+    assert all(str(path) in paths for path in expect.values())
diff --git a/tests/test_flatpak_toggle.py b/tests/test_flatpak_toggle.py
new file mode 100644
index 0000000..eec56e7
--- /dev/null
+++ b/tests/test_flatpak_toggle.py
@@ -0,0 +1,30 @@
+import pytest
+
+from dzgui.const.constants import FLATPAK_RUN_CMD, FLATPAK_SANDBOX
+from dzgui.const.enum import Preferences
+from dzgui.views.pages.options import FlatpakToggleField
+
+
+class MockController:
+    def __init__(self) -> None:
+        self.command: str
+
+    def update_config(self, context: Preferences, cmd: str) -> None:
+        self.command = cmd
+
+    def get_command(self) -> str:
+        return self.command
+
+
+@pytest.mark.parametrize("index, expect", [(0, FLATPAK_RUN_CMD), (1, FLATPAK_SANDBOX)])
+def test_toggle(index: int, expect: str) -> None:
+    controller = MockController()
+    toggle = FlatpakToggleField(controller)
+    match index:
+        case 0:
+            toggle.radio2.set_active(True)
+            toggle.radio1.set_active(True)
+        case 1:
+            toggle.radio1.set_active(True)
+            toggle.radio2.set_active(True)
+    assert controller.get_command() == expect
diff --git a/tests/test_html_escaping.py b/tests/test_html_escaping.py
index 471bb1a..904e5b2 100644
--- a/tests/test_html_escaping.py
+++ b/tests/test_html_escaping.py
@@ -1,3 +1,5 @@
+import pytest
+
 from dzgui.api.servers import Details
 from dzgui.views.dialogs.servers import ServerDetailsDialog
 
@@ -21,6 +23,7 @@ class MockController:
         return None
 
 
+@pytest.mark.filterwarnings("ignore::DeprecationWarning")
 def test_html_escaping() -> None:
     name = "Test server"
     desc = "<Server description> Game & mods"
@@ -31,5 +34,7 @@ def test_html_escaping() -> None:
     controller = MockController()
     dialog = ServerDetailsDialog(controller, details)
     dialog.destroy()
+    while Gtk.events_pending():
+        Gtk.main_iteration()
 
     assert dialog.description.get_text() == desc
diff --git a/tests/test_process_detection.py b/tests/test_process_detection.py
index 23f0956..8b25c9b 100644
--- a/tests/test_process_detection.py
+++ b/tests/test_process_detection.py
@@ -1,3 +1,4 @@
+import pytest
 import unittest
 from unittest.mock import patch
 
@@ -9,6 +10,8 @@ from dzgui.const.constants import (
 )
 from dzgui.init import proc
 
+pytestmark = pytest.mark.flatpak
+
 
 class TestSteamDetection(unittest.TestCase):
     def test_flatpak_detection_with_multiple_running_apps(self):