diff --git a/tests/fixtures/__init__.py b/tests/fixtures/__init__.py
index 31577b5..043f9fc 100644
--- a/tests/fixtures/__init__.py
+++ b/tests/fixtures/__init__.py
@@ -1,5 +1,7 @@
 from pathlib import Path
 
 CWD = Path(__file__).parent
-def fixture_path(fixture: str) -> str:
-    return str(CWD / fixture)
+
+
+def fixture_path(fixture: str) -> Path:
+    return Path(CWD).joinpath(fixture)
diff --git a/tests/test_app_download_settings.py b/tests/test_app_download_settings.py
index ad2639b..f47c337 100644
--- a/tests/test_app_download_settings.py
+++ b/tests/test_app_download_settings.py
@@ -43,23 +43,25 @@ def patch_api() -> None:
     mp.undo()
 
 
-def test_no_last_update(steam_path) -> None:
+def test_no_last_update(steam_path: Path) -> None:
     assert get_last_updated(steam_path, 555) is None
 
 
-def test_last_update(steam_path) -> None:
+def test_last_update(steam_path: Path) -> None:
     assert get_last_updated(steam_path, 444) == "2026-10-22 00:09:33"
 
 
-def test_app_allows_downloads(steam_path) -> None:
+def test_app_allows_downloads(steam_path: Path) -> None:
     assert get_app_allows_downloads(steam_path, 111) is True
 
 
-def test_app_disallows_downloads(steam_path):
+def test_app_disallows_downloads(steam_path: Path) -> None:
     assert get_app_allows_downloads(steam_path, 222) is False
 
 
-def test_app_delegates_downloads(monkeypatch, steam_path, client_allows):
+def test_app_delegates_downloads(
+    monkeypatch: MonkeyPatch, steam_path: Path, client_allows: Path
+) -> None:
     monkeypatch.setattr("dzgui.api.steam.get_config", mock_config_disallows)
     assert get_app_allows_downloads(steam_path, 333) is False
     monkeypatch.setattr("dzgui.api.steam.get_config", mock_config_allows)
diff --git a/tests/test_bare_conf_files.py b/tests/test_bare_conf_files.py
index 052b829..e8ecf40 100644
--- a/tests/test_bare_conf_files.py
+++ b/tests/test_bare_conf_files.py
@@ -1,6 +1,8 @@
 import pytest
 import tempfile
 
+from typing import TYPE_CHECKING
+
 from dzgui.app_init import copy_bare_configs
 from dzgui.config.xdg import get_xdg_paths, parse_filepaths
 
@@ -8,9 +10,13 @@ from dzgui.config.xdg import get_xdg_paths, parse_filepaths
 CONF_STRING = "DZGUI_CONF\n"
 STATE_STRING = "DZGUI_STATE\n"
 
+if TYPE_CHECKING:
+    from _pytest.monkeypatch import MonkeyPatch
+    from dzgui.config.xdg import Xdg
+
 
 @pytest.fixture
-def state_files():
+def state_files() -> list[str]:
     state = [
         "dzg.history",
         "dzg.versions",
@@ -25,7 +31,7 @@ def state_files():
 
 
 @pytest.fixture
-def xdg_paths(monkeypatch):
+def xdg_paths(monkeypatch: "MonkeyPatch") -> "Xdg":
     routes = {
         "XDG_CONFIG_HOME": "",
         "XDG_STATE_HOME": "",
@@ -42,7 +48,7 @@ def xdg_paths(monkeypatch):
 
 
 @pytest.mark.mods
-def test_config_file_import(xdg_paths, state_files):
+def test_config_file_import(xdg_paths: "Xdg", state_files: list[str]) -> None:
 
     # NOTE: write bare files in root
     tmp_conf = xdg_paths.config.parent.parent
@@ -67,7 +73,7 @@ def test_config_file_import(xdg_paths, state_files):
 
 
 @pytest.mark.mods
-def test_config_file_no_import(xdg_paths, state_files):
+def test_config_file_no_import(xdg_paths: "Xdg", state_files: list[str]) -> None:
     for subdir in xdg_paths.config.parent, xdg_paths.resolution.parent:
         subdir.mkdir()
 
diff --git a/tests/test_changelog.py b/tests/test_changelog.py
index e897571..95490d3 100644
--- a/tests/test_changelog.py
+++ b/tests/test_changelog.py
@@ -5,7 +5,7 @@ from pathlib import Path
 
 
 @pytest.fixture
-def changelog(request) -> None:
+def changelog(request: pytest.FixtureRequest) -> str:
     root = request.config.rootpath
     changelog = Path(root).joinpath("CHANGELOG.md").read_text()
     return changelog
@@ -19,7 +19,7 @@ def count_hash(line: str) -> int:
     return cnt
 
 
-def test_changelog_prefix(changelog) -> None:
+def test_changelog_prefix(changelog: str) -> None:
     r = r".*(\[.*\]).*"
     lines = changelog.splitlines()
     sort = sorted(lines)
diff --git a/tests/test_client_name.py b/tests/test_client_name.py
index 27f81fc..294b71b 100644
--- a/tests/test_client_name.py
+++ b/tests/test_client_name.py
@@ -1,14 +1,19 @@
 import pytest
 
+from typing import Any, TYPE_CHECKING
+
 from dzgui.const.constants import FLATPAK_RUN_CMD, STEAM_CMD
 from dzgui.controllers.mc import Controller
 
+if TYPE_CHECKING:
+    from _pytest.monkeypatch import MonkeyPatch
+
 
 @pytest.mark.parametrize(
     "value, expected", [(FLATPAK_RUN_CMD, "Flatpak"), (STEAM_CMD, "Steam")]
 )
-def test_human_name(monkeypatch, value, expected) -> None:
-    def mock_query_config(*args) -> str:
+def test_human_name(monkeypatch: "MonkeyPatch", value: str, expected: str) -> None:
+    def mock_query_config(*args: Any) -> str:
         return value
 
     monkeypatch.setattr(
diff --git a/tests/test_colorscheme.py b/tests/test_colorscheme.py
index a8818dc..089f46d 100644
--- a/tests/test_colorscheme.py
+++ b/tests/test_colorscheme.py
@@ -10,7 +10,7 @@ gi.require_version("Gtk", "3.0")
 from gi.repository import Gtk, Gio, GLib  # noqa
 
 
-class DummyWidget(ColorAwareApp, Gtk.Button):
+class DummyWidget(ColorAwareApp, Gtk.Button):  # type: ignore
     def __init__(self) -> None:
         super().__init__()
 
@@ -27,7 +27,7 @@ def widget() -> DummyWidget:
 
 
 @pytest.mark.parametrize("key, expect", [("default", False), ("prefer-dark", True)])
-def test_light_mode(widget, key: str, expect: bool) -> None:
+def test_light_mode(widget: DummyWidget, key: str, expect: bool) -> None:
     local_pref = subprocess.run(
         ["gsettings", "get", "org.gnome.desktop.interface", "color-scheme"],
         capture_output=True,
diff --git a/tests/test_columns.py b/tests/test_columns.py
index e0a06f6..0567cbb 100644
--- a/tests/test_columns.py
+++ b/tests/test_columns.py
@@ -1,33 +1,48 @@
 import pytest
 
+from typing import TYPE_CHECKING
+
 from dzgui.init.migrate import convert_cols_file
 from tests.fixtures import fixture_path
 
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
 @pytest.fixture
-def columns_with_perspective():
+def columns_with_perspective() -> "Path":
     return fixture_path("columns_1")
 
+
 @pytest.fixture
-def columns_without_perspective():
+def columns_without_perspective() -> "Path":
     return fixture_path("columns_2")
 
+
 @pytest.fixture
-def columns_with_view():
+def columns_with_view() -> "Path":
     return fixture_path("columns_3")
 
+
 @pytest.mark.config
-def test_columns_with_perspective(columns_with_perspective):
+def test_columns_with_perspective(columns_with_perspective: "Path") -> None:
     j = convert_cols_file(columns_with_perspective)
+    if j is None:
+        return
     assert "View" in j["cols"]
     assert "Max" in j["cols"]
 
+
 @pytest.mark.config
-def test_columns_without_perspective(columns_without_perspective):
+def test_columns_without_perspective(columns_without_perspective: "Path") -> None:
     j = convert_cols_file(columns_without_perspective)
+    if j is None:
+        return
     assert "View" not in j["cols"]
     assert "Max" not in j["cols"]
 
+
 @pytest.mark.config
-def test_columns_with_view(columns_with_view):
+def test_columns_with_view(columns_with_view: "Path") -> None:
     j = convert_cols_file(columns_with_view)
     assert j is None
diff --git a/tests/test_config.py b/tests/test_config.py
index 9bbe872..da4bf4e 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -1,25 +1,30 @@
 import json
 import pytest
 
+from typing import Any, TYPE_CHECKING
+
 from dzgui.const.boilerplate import config_boilerplate
 from dzgui.config.query import get_config
 from dzgui.config.xdg import get_xdg_paths, parse_filepaths
 from dzgui.config import convert
 from tests.fixtures import fixture_path
 
+if TYPE_CHECKING:
+    from pathlib import Path
+
 
 @pytest.fixture
-def legacy_config():
+def legacy_config() -> "Path":
     return fixture_path("dztuirc_1")
 
 
 @pytest.fixture
-def unset_values():
+def unset_values() -> "Path":
     return fixture_path("dztuirc_3")
 
 
 @pytest.fixture
-def keys():
+def keys() -> list[str]:
     return [
         "fav_server",
         "fav_label",
@@ -36,7 +41,7 @@ def keys():
 
 # TODO: use a static fixture instead of system config
 @pytest.fixture
-def config():
+def config() -> Any:
     paths = get_xdg_paths()
     xdg = parse_filepaths(paths)
     return get_config(xdg.config)
@@ -44,21 +49,21 @@ def config():
 
 @pytest.mark.post_install
 @pytest.mark.realconfig
-def test_invalid_config_value(config):
+def test_invalid_config_value(config: Any) -> None:
     with pytest.raises(Exception):
         assert config["foo"] is None
 
 
 @pytest.mark.post_install
 @pytest.mark.realconfig
-def test_default_config_values(keys, config):
+def test_default_config_values(keys: list[str], config: Any) -> None:
     for key in keys:
         assert config[key] is not None
 
 
 @pytest.mark.post_install
 @pytest.mark.realconfig
-def test_contains_invalid_values(keys, config):
+def test_contains_invalid_values(keys: list[str], config: Any) -> None:
     for key in config:
         assert key in keys
 
@@ -70,15 +75,15 @@ def test_contains_invalid_values(keys, config):
         ("dztuirc_2", (False, False, False)),
     ],
 )
-def test_bool_conversion(fixture, expect):
-    fixture = fixture_path(fixture)
-    j = convert.rc2json(fixture)
+def test_bool_conversion(fixture: str, expect: tuple[bool, bool, bool]) -> None:
+    fixture_p = fixture_path(fixture)
+    j = convert.rc2json(fixture_p)
     j = json.loads(j)
     assert j["fullscreen"] == expect[0]
     assert not j["use_miles"]
 
 
-def test_key_conversion(legacy_config):
+def test_key_conversion(legacy_config: "Path") -> None:
     j = convert.rc2json(legacy_config)
     j = json.loads(j)
     keys = [
@@ -92,7 +97,7 @@ def test_key_conversion(legacy_config):
         assert key not in j
 
 
-def test_missing_values(unset_values):
+def test_missing_values(unset_values: "Path") -> None:
     j = convert.rc2json(unset_values)
     j = json.loads(j)
     assert j.keys() == config_boilerplate.keys()
diff --git a/tests/test_flatpak_override.py b/tests/test_flatpak_override.py
index eeb640a..6a5fcdd 100644
--- a/tests/test_flatpak_override.py
+++ b/tests/test_flatpak_override.py
@@ -1,6 +1,8 @@
 import configparser
 import pytest
 
+from pathlib import Path
+
 from dzgui.const.constants import FLATPAK_APPID, GTK_APP_ID, TMP_PATH
 from dzgui.config.xdg import get_xdg_paths
 from dzgui.util.flatpak import apply_overrides
@@ -13,17 +15,17 @@ pytestmark = pytest.mark.flatpak
 
 
 @pytest.fixture
-def xdg_paths() -> dict[str, str]:
+def xdg_paths() -> dict[str, Path]:
     return get_xdg_paths()
 
 
 @pytest.fixture
-def override(xdg_paths) -> None:
+def override(xdg_paths: dict[str, Path]) -> None:
     apply_overrides(xdg_paths)
 
 
 @pytest.fixture
-def config(xdg_paths) -> configparser.ConfigParser:
+def config(xdg_paths: dict[str, Path]) -> configparser.ConfigParser:
     conf_path = xdg_paths["XDG_DATA_HOME"].parent.joinpath(
         f"flatpak/overrides/{FLATPAK_APPID}"
     )
@@ -32,14 +34,16 @@ def config(xdg_paths) -> configparser.ConfigParser:
     return config
 
 
-def test_session_bus(override, config) -> None:
+def test_session_bus(override: None, config: configparser.ConfigParser) -> None:
     bus = config[BUS_KEY][GTK_APP_ID]
     assert bus == "own"
 
 
-def test_paths(override, xdg_paths, config) -> None:
-    expect: list[str] = []
-    expect.append(TMP_PATH)
+def test_paths(
+    override: None, xdg_paths: dict[str, Path], config: configparser.ConfigParser
+) -> None:
+    expect: list[Path] = []
+    expect.append(Path(TMP_PATH))
     expect.extend([*xdg_paths.values()])
     paths = config[PATHS_KEY][PATHS_SUBKEY].split(";")
     assert all(str(path) in paths for path in expect)
diff --git a/tests/test_flatpak_toggle.py b/tests/test_flatpak_toggle.py
index eec56e7..ca17f7a 100644
--- a/tests/test_flatpak_toggle.py
+++ b/tests/test_flatpak_toggle.py
@@ -2,10 +2,11 @@ import pytest
 
 from dzgui.const.constants import FLATPAK_RUN_CMD, FLATPAK_SANDBOX
 from dzgui.const.enum import Preferences
+from dzgui.controllers.mc import Controller
 from dzgui.views.pages.options import FlatpakToggleField
 
 
-class MockController:
+class MockController(Controller):
     def __init__(self) -> None:
         self.command: str
 
diff --git a/tests/test_geo_file.py b/tests/test_geo_file.py
index 17c195f..6d962e5 100644
--- a/tests/test_geo_file.py
+++ b/tests/test_geo_file.py
@@ -20,20 +20,23 @@ def get_db_len(path: Path) -> int:
     c = conn.cursor()
     c.execute("SELECT COUNT(*) from ips")
     db_len = c.fetchone()[0]
-    return db_len
+    return int(db_len)
 
 
 @pytest.fixture
 def csv() -> Path:
     csv = Path(tempfile.NamedTemporaryFile().name)
     url = find_download_url(DB_IP)
+    if url is None:
+        raise ValueError()
     tmp = serialize(url)
     unzip(tmp, csv)
     strip_ipv6(csv)
     return csv
 
+
 @pytest.mark.slow
-def test_stripping(csv):
+def test_stripping(csv: Path) -> None:
     with open(csv, "rb") as f:
         first = f.readline().decode().rstrip()
         try:
@@ -52,7 +55,7 @@ def test_stripping(csv):
 
 
 @pytest.mark.slow
-def test_row_parity(csv) -> None:
+def test_row_parity(csv: Path) -> None:
     rows = csv.read_text().splitlines()
 
     db = Path(tempfile.NamedTemporaryFile().name)
diff --git a/tests/test_html_escaping.py b/tests/test_html_escaping.py
index 2c3c03c..ed9e42a 100644
--- a/tests/test_html_escaping.py
+++ b/tests/test_html_escaping.py
@@ -1,26 +1,30 @@
+import gi
 import pytest
+from typing import Any
 
 from dzgui.api.servers import Details
+from dzgui.controllers.mc import Controller
+from dzgui.controllers.emitter import Emitter
+from dzgui.views.base import OuterWindow
 from dzgui.views.dialogs.servers import ServerDetailsDialog
 
-import gi
 
 gi.require_version("Gtk", "3.0")
 from gi.repository import Gtk
 
 
-class MockController:
+class MockController(Controller):
     def __init__(self) -> None:
-        self.window = Gtk.Window()
+        pass
 
-    def get_window(self) -> Gtk.Window:
-        return self.window
+    def get_window(self) -> None:  # type: ignore[override]
+        return None
 
     def get_server_name(self) -> str:
         return "My server"
 
-    def get_emitter(self) -> None:
-        return None
+    def get_emitter(self) -> Emitter:
+        return Emitter()
 
 
 @pytest.mark.filterwarnings("ignore::DeprecationWarning")
diff --git a/tests/test_ip.py b/tests/test_ip.py
index 3178b80..899c5da 100644
--- a/tests/test_ip.py
+++ b/tests/test_ip.py
@@ -15,7 +15,7 @@ from dzgui.views.components.entry import validate_ip_truthy
         ("192.168.1.101:27016", True),
     ],
 )
-def test_ip_entry(ip) -> None:
+def test_ip_entry(ip: tuple[str, bool]) -> None:
     string, state = ip
     assert validate_ip_truthy(string) is state
 
diff --git a/tests/test_list_store.py b/tests/test_list_store.py
index 88ff1bd..4342b8c 100644
--- a/tests/test_list_store.py
+++ b/tests/test_list_store.py
@@ -1,27 +1,29 @@
 import pytest
 
+from typing import Any
+
 from dzgui.model.model_factory import FastInsertListStore
 
 
 @pytest.fixture
-def heterogeneous_list() -> None:
+def heterogeneous_list() -> list[list[Any]]:
     return [["a", 0, True], ["b", 1, False]]
 
 
 @pytest.fixture
-def mismatched_length_list() -> None:
+def mismatched_length_list() -> list[list[Any]]:
     return [["a", 0, True], ["b", 1, False, 0]]
 
 
 @pytest.fixture
-def extended_list(heterogeneous_list) -> None:
+def extended_list(heterogeneous_list: list[list[Any]]) -> FastInsertListStore:
     fs = FastInsertListStore(str, int, bool)
     fs.extend(heterogeneous_list)
     return fs
 
 
 @pytest.fixture
-def appended_list(heterogeneous_list) -> None:
+def appended_list(heterogeneous_list: list[list[Any]]) -> FastInsertListStore:
     fs = FastInsertListStore(str, int, bool)
     for row in heterogeneous_list:
         fs.append(row)
@@ -29,19 +31,21 @@ def appended_list(heterogeneous_list) -> None:
 
 
 @pytest.mark.parametrize("target", ["extended_list", "appended_list"])
-def test_list_parity(heterogeneous_list, request, target) -> None:
+def test_list_parity(
+    heterogeneous_list: list[list[Any]], request: pytest.FixtureRequest, target: str
+) -> None:
     target = request.getfixturevalue(target)
     extracted = [[el for el in row] for row in target]
     assert heterogeneous_list == extracted
 
 
-def test_type_disparity(heterogeneous_list) -> None:
+def test_type_disparity(heterogeneous_list: list[list[Any]]) -> None:
     with pytest.raises(TypeError):
         fs = FastInsertListStore(str, bool, bool)
         fs.extend(heterogeneous_list)
 
 
-def test_length_disparity(mismatched_length_list) -> None:
+def test_length_disparity(mismatched_length_list: list[list[Any]]) -> None:
     with pytest.raises(ValueError):
         fs = FastInsertListStore(str, int, bool)
         fs.extend(mismatched_length_list)
diff --git a/tests/test_locale.py b/tests/test_locale.py
index 53a3f59..0cec0bf 100644
--- a/tests/test_locale.py
+++ b/tests/test_locale.py
@@ -1,27 +1,32 @@
+from typing import TYPE_CHECKING
+
 from dzgui.util import localize
 
+if TYPE_CHECKING:
+    from _pytest.monkeypatch import MonkeyPatch
 
-def test_de(monkeypatch):
+
+def test_de(monkeypatch: "MonkeyPatch") -> None:
     monkeypatch.setenv("LC_ALL", "de_DE.UTF-8")
     localize.set_locale()
     assert localize.number(9900) == "9.900"
     assert localize.number(99.88) == "99,88"
 
 
-def test_en(monkeypatch):
+def test_en(monkeypatch: "MonkeyPatch") -> None:
     monkeypatch.setenv("LC_ALL", "en_US.UTF-8")
     localize.set_locale()
     assert localize.number(9900) == "9,900"
     assert localize.number(99.88) == "99.88"
 
 
-def test_none(monkeypatch):
+def test_none(monkeypatch: "MonkeyPatch") -> None:
     localize.set_locale()
     assert localize.number(9900) == "9,900"
     assert localize.number(99.88) == "99.88"
 
 
-def test_empty(monkeypatch):
+def test_empty(monkeypatch: "MonkeyPatch") -> None:
     monkeypatch.setenv("LC_ALL", "")
     localize.set_locale()
     assert localize.number(9900) == "9,900"
diff --git a/tests/test_log_redaction.py b/tests/test_log_redaction.py
index 438a195..adff66f 100644
--- a/tests/test_log_redaction.py
+++ b/tests/test_log_redaction.py
@@ -7,13 +7,13 @@ from dzgui.util.redact import RedactionFilter, REDACTION_PATTERNS
 class RecordsListHandler(logging.Handler):
     def __init__(self) -> None:
         super().__init__()
-        self.records_list = []
+        self.records_list: list[logging.LogRecord] = []
 
     def emit(self, record: logging.LogRecord) -> None:
         self.records_list.append(record)
 
-    def pop(self) -> None:
-        return self.records_list[-1].msg
+    def pop(self) -> str:
+        return str(self.records_list[-1].msg)
 
 
 @pytest.mark.redact
diff --git a/tests/test_path_conversion.py b/tests/test_path_conversion.py
index c9b1710..c2d1185 100644
--- a/tests/test_path_conversion.py
+++ b/tests/test_path_conversion.py
@@ -1,8 +1,13 @@
 from pathlib import Path
+from typing import TYPE_CHECKING
+
 from dzgui.config.xdg import get_xdg_paths
 
+if TYPE_CHECKING:
+    from _pytest.monkeypatch import MonkeyPatch
 
-def test_path_fallback(monkeypatch) -> None:
+
+def test_path_fallback(monkeypatch: "MonkeyPatch") -> None:
     envs = ["XDG_DATA_HOME", "XDG_STATE_HOME", "XDG_CONFIG_HOME", "XDG_CACHE_HOME"]
     for env in envs:
         monkeypatch.setenv(env, "/etc/dzgui")
diff --git a/tests/test_paused_downloads.py b/tests/test_paused_downloads.py
index 1c45ca2..6183e93 100644
--- a/tests/test_paused_downloads.py
+++ b/tests/test_paused_downloads.py
@@ -1,8 +1,12 @@
 import pytest
 from pathlib import Path
+from typing import TYPE_CHECKING
 
 from dzgui.api.steam import is_dayz_downloading
 
+if TYPE_CHECKING:
+    from _pytest.monkeypatch import MonkeyPatch
+
 
 @pytest.mark.parametrize(
     "file_list, expect",
@@ -16,7 +20,9 @@ from dzgui.api.steam import is_dayz_downloading
         (["state_221100_1111"], False),
     ],
 )
-def test_dayz_patch_pending(monkeypatch, file_list: list[str], expect: bool) -> None:
+def test_dayz_patch_pending(
+    monkeypatch: "MonkeyPatch", file_list: list[str], expect: bool
+) -> None:
     def mock_get_pending_downloads(steam_path: Path, appid: int) -> None:
         files = [Path(file) for file in file_list]
         return files
diff --git a/tests/test_pefile.py b/tests/test_pefile.py
index ebcfb0e..6d6be0a 100644
--- a/tests/test_pefile.py
+++ b/tests/test_pefile.py
@@ -7,7 +7,7 @@ from dzgui.api.steam import (
     VDFLoadError,
     AppNotInstalledError,
     AppMovedError,
-    get_app_path
+    get_app_path,
 )
 
 from dzgui.config.query import get_config
@@ -20,16 +20,14 @@ pytestmark = pytest.mark.apitest
 
 
 @pytest.fixture
-def default_steam_path():
+def default_steam_path() -> str:
     paths = get_xdg_paths()
     xdg = parse_filepaths(paths)
     conf = get_config(xdg.config)
-    return conf["default_steam_path"]
+    return str(conf["default_steam_path"])
 
 
-# TODO: split into separate test file
-# FIXME: use fixtures
-def test_pefile_length(default_steam_path):
+def test_pefile_length(default_steam_path: str) -> None:
     try:
         pe_file_path = PeFile.get_pefile_path(Path(default_steam_path), APPID_DAYZ)
         vers = PeFile.get_dayz_version(pe_file_path)
@@ -39,7 +37,7 @@ def test_pefile_length(default_steam_path):
     assert len(st) == 3
 
 
-def test_invalid_pefile_path():
+def test_invalid_pefile_path() -> None:
     with pytest.raises(VDFLoadError):
         try:
             PeFile.get_pefile_path(Path("/not/a/path"), APPID_DAYZ)
@@ -57,6 +55,7 @@ def test_invalid_pefile_path():
 )
 def test_not_in_library(monkeypatch, fixture, exception):
     import dzgui.api.steam as steam
+
     monkeypatch.setattr(steam, "LIBRARYFOLDERS_PATH", fixture)
 
     folder_path = Path(fixture_path("api"))
@@ -68,12 +67,13 @@ def test_not_in_library(monkeypatch, fixture, exception):
 
 
 @pytest.fixture
-def second_drive():
+def second_drive() -> str:
     return "in_library_on_second_drive.vdf"
 
 
-def test_on_second_drive(monkeypatch, second_drive):
+def test_on_second_drive(monkeypatch, second_drive: str) -> None:
     import dzgui.api.steam as steam
+
     monkeypatch.setattr(steam, "LIBRARYFOLDERS_PATH", second_drive)
     folder_path = Path(fixture_path("api"))
     path = get_app_path(folder_path, APPID_DAYZ)
diff --git a/tests/test_process_detection.py b/tests/test_process_detection.py
index 8b25c9b..cc89f05 100644
--- a/tests/test_process_detection.py
+++ b/tests/test_process_detection.py
@@ -14,9 +14,9 @@ pytestmark = pytest.mark.flatpak
 
 
 class TestSteamDetection(unittest.TestCase):
-    def test_flatpak_detection_with_multiple_running_apps(self):
-        def flatpak_output(args, *, text):
-            # Default `flatpak ps` includes instance, PID, app and runtime columns.
+    def test_flatpak_detection_with_multiple_running_apps(self) -> None:
+        def flatpak_output(args, *, text: str) -> str:
+            # Default 'flatpak ps' includes instance, PID, app and runtime columns.
             if args == ["flatpak", "ps", "--columns=application"]:
                 return f"com.spotify.Client\n{FLATPAK_APPID}\n{FLATPAK_APPID}\n"
             return f"3904921611\t1257689\t{FLATPAK_APPID}\torg.freedesktop.Platform\n"
@@ -29,7 +29,7 @@ class TestSteamDetection(unittest.TestCase):
                 with self.subTest(client=client):
                     self.assertTrue(proc.is_steam_running(client))
 
-    def test_flatpak_not_running(self):
+    def test_flatpak_not_running(self) -> None:
         with patch.object(proc, "has_cmd", return_value=True):
             for output in ("", "com.spotify.Client\n", f"{FLATPAK_APPID}Helper\n"):
                 with (
@@ -38,7 +38,7 @@ class TestSteamDetection(unittest.TestCase):
                 ):
                     self.assertFalse(proc.is_flatpak_steam_running())
 
-    def test_flatpak_not_installed(self):
+    def test_flatpak_not_installed(self) -> None:
         with (
             patch.object(proc, "has_cmd", return_value=False),
             patch.object(proc.subprocess, "check_output") as check_output,
@@ -46,7 +46,7 @@ class TestSteamDetection(unittest.TestCase):
             self.assertFalse(proc.is_flatpak_steam_running())
             check_output.assert_not_called()
 
-    def test_native_steam(self):
+    def test_native_steam(self) -> None:
         with patch.object(proc, "has_cmd", return_value=True):
             for output, expected in (
                 (
@@ -73,6 +73,6 @@ class TestSteamDetection(unittest.TestCase):
                 ):
                     self.assertEqual(proc.is_native_steam_running(), expected)
 
-    def test_invalid_client(self):
+    def test_invalid_client(self) -> None:
         with self.assertRaises(TypeError):
             proc.is_steam_running("invalid-client")
diff --git a/tests/test_remote_api.py b/tests/test_remote_api.py
index bebd184..a340510 100644
--- a/tests/test_remote_api.py
+++ b/tests/test_remote_api.py
@@ -1,23 +1,28 @@
 import pytest
 
+from typing import TYPE_CHECKING
+
+from dzgui.api import probe
 from dzgui.config.query import get_config
 from dzgui.config.xdg import get_xdg_paths, parse_filepaths
-from dzgui.api import probe
+
+if TYPE_CHECKING:
+    from pathlib import Path
 
 pytestmark = pytest.mark.webtest
 
 
 @pytest.fixture
-def config():
+def config() -> dict[str, "Path"]:
     paths = get_xdg_paths()
     xdg = parse_filepaths(paths)
     return get_config(xdg.config)
 
 
-def test_ipdb():
+def test_ipdb() -> None:
     assert probe.test_ipdb()
 
 
-def test_steam(config):
+def test_steam(config: dict[str, "Path"]) -> None:
     key = config["steam_api"]
     assert probe.test_steam_api(key)
diff --git a/tests/test_server_metadata.py b/tests/test_server_metadata.py
index bdde14b..0c8eac7 100644
--- a/tests/test_server_metadata.py
+++ b/tests/test_server_metadata.py
@@ -23,7 +23,7 @@ def test_time_accel(details, key, expect) -> None:
     assert getattr(details, key) == expect
 
 
-def test_gametime(details) -> None:
+def test_gametime(details: Details | None) -> None:
     time_reg = r"^(0[0-9]|1[0-9]|2[0-3]):([0-5][0-9]$)"
     match = re.match(time_reg, details.gametime)
     assert match is not None
diff --git a/tests/test_shortcuts.py b/tests/test_shortcuts.py
index eea75e4..ac23e9d 100644
--- a/tests/test_shortcuts.py
+++ b/tests/test_shortcuts.py
@@ -1,12 +1,17 @@
 import pytest
 import tempfile
 
+from typing import TYPE_CHECKING
+
 from pathlib import Path
 from _pytest.monkeypatch import MonkeyPatch
 
 from dzgui.api.shortcuts import Shortcuts
 from tests.fixtures import fixture_path
 
+if TYPE_CHECKING:
+    from _pytest.monkeypatch import MonkeyPatch
+
 pytestmark = pytest.mark.apitest
 
 
@@ -22,13 +27,13 @@ def patch_api() -> None:
     mp.undo()
 
 
-def test_no_shortcuts(monkeypatch) -> None:
+def test_no_shortcuts(monkeypatch: "MonkeyPatch") -> None:
     s = Shortcuts(Path(""))
     assert len(s.shortcuts["shortcuts"]) == 0
 
 
 @pytest.fixture
-def dummy_app() -> None:
+def dummy_app() -> dict[str, str]:
     d = {
         "AppName": "TEST APP",
         "StartDir": "TEST_DIR",