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_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):