diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 937f01e..dfadbd7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,6 +21,13 @@ jobs:
       - uses: actions/checkout@v4
       - run: pipx run check-manifest
 
+  pyright:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v6
+      - run: uv run pyright
+
   test:
     name: ${{ matrix.platform }} py${{ matrix.python-version }}
     runs-on: ${{ matrix.platform }}
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8051bf3..c95a2b2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -22,7 +22,6 @@ repos:
         args: ["--fix", "--unsafe-fixes"]
       - id: ruff-format
 
-
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v1.16.1
     hooks:
@@ -32,3 +31,14 @@ repos:
           - pydantic >2
           - pydantic-compat
           - in-n-out
+
+  - repo: local
+    hooks:
+      - id: pyright
+        stages: [manual]
+        name: pyright
+        language: system
+        exclude: "^tests/.*|^demo/.*|^docs/.*"
+        types_or: [python, pyi]
+        require_serial: true
+        entry: uv run pyright
diff --git a/demo/keybinding_helper.py b/demo/keybinding_helper.py
index da2afd0..5bc0cdc 100644
--- a/demo/keybinding_helper.py
+++ b/demo/keybinding_helper.py
@@ -8,4 +8,4 @@
 w = QModelKeyBindingEdit()
 w.editingFinished.connect(lambda: print(w.keyBinding()))
 w.show()
-sys.exit(app.exec_())
+sys.exit(app.exec())
diff --git a/demo/model_app.py b/demo/model_app.py
index 1a5eb67..f28d4ad 100644
--- a/demo/model_app.py
+++ b/demo/model_app.py
@@ -1,4 +1,5 @@
 from pathlib import Path
+from typing import TYPE_CHECKING, cast
 
 from qtpy.QtCore import QFile, QFileInfo, QSaveFile, Qt, QTextStream
 from qtpy.QtWidgets import QApplication, QFileDialog, QMessageBox, QTextEdit
@@ -7,6 +8,9 @@
 from app_model.backends.qt import QModelMainWindow
 from app_model.expressions import create_context
 
+if TYPE_CHECKING:
+    from app_model.backends.qt._qmenu import QModelMenuBar
+
 
 class MainWindow(QModelMainWindow):
     def __init__(self, app: Application) -> None:
@@ -21,7 +25,8 @@ def __init__(self, app: Application) -> None:
         self.addModelToolBar(MenuId.FILE, exclude={CommandId.SAVE_AS, CommandId.EXIT})
         self.addModelToolBar(MenuId.EDIT)
         self.addModelToolBar(MenuId.HELP)
-        self.statusBar().showMessage("Ready")
+        if sb := self.statusBar():
+            sb.showMessage("Ready")
 
         self.set_current_file("")
 
@@ -33,11 +38,13 @@ def _update_context(self, available: bool) -> None:
         self._ctx["copyAvailable"] = available
 
     def _on_context_changed(self) -> None:
-        self.menuBar().update_from_context(self._ctx)
+        mb = cast("QModelMenuBar", self.menuBar())
+        mb.update_from_context(self._ctx)
 
     def set_current_file(self, fileName: str) -> None:
         self._cur_file = fileName
-        self._text_edit.document().setModified(False)
+        if doc := self._text_edit.document():
+            doc.setModified(False)
         self.setWindowModified(False)
 
         if self._cur_file:
@@ -58,11 +65,11 @@ def save_as(self) -> bool:
 
     def save_file(self, fileName: str) -> bool:
         error = None
-        QApplication.setOverrideCursor(Qt.WaitCursor)
+        QApplication.setOverrideCursor(Qt.CursorShape.WaitCursor)
         file = QSaveFile(fileName)
         if file.open(QFile.OpenModeFlag.WriteOnly | QFile.OpenModeFlag.Text):  # type: ignore
             outf = QTextStream(file)
-            outf << self._text_edit.toPlainText()
+            outf << self._text_edit.toPlainText()  # pyright: ignore
             if not file.commit():
                 reason = file.errorString()
                 error = f"Cannot write file {fileName}:\n{reason}."
@@ -77,7 +84,7 @@ def save_file(self, fileName: str) -> bool:
         return True
 
     def maybe_save(self) -> bool:
-        if self._text_edit.document().isModified():
+        if (doc := self._text_edit.document()) and doc.isModified():
             ret = QMessageBox.warning(
                 self,
                 "Application",
@@ -113,12 +120,13 @@ def load_file(self, fileName: str) -> None:
             return
 
         inf = QTextStream(file)
-        QApplication.setOverrideCursor(Qt.WaitCursor)
+        QApplication.setOverrideCursor(Qt.CursorShape.WaitCursor)
         self._text_edit.setPlainText(inf.readAll())
         QApplication.restoreOverrideCursor()
 
         self.set_current_file(fileName)
-        self.statusBar().showMessage("File loaded", 2000)
+        if sb := self.statusBar():
+            sb.showMessage("File loaded", 2000)
 
     def about(self) -> None:
         QMessageBox.about(
@@ -255,4 +263,4 @@ class CommandId:
 
     app.injection_store.register_provider(lambda: main_win, MainWindow)
     main_win.show()
-    qapp.exec_()
+    qapp.exec()
diff --git a/demo/multi_file/__main__.py b/demo/multi_file/__main__.py
index 91e6466..b5bd22c 100644
--- a/demo/multi_file/__main__.py
+++ b/demo/multi_file/__main__.py
@@ -10,4 +10,4 @@
 qapp = QApplication.instance() or QApplication([])
 app = MyApp()
 app.show()
-qapp.exec_()
+qapp.exec()
diff --git a/demo/multi_file/functions.py b/demo/multi_file/functions.py
index 0e83201..03af6f3 100644
--- a/demo/multi_file/functions.py
+++ b/demo/multi_file/functions.py
@@ -7,7 +7,8 @@ def open_file() -> None:
 
 
 def close() -> None:
-    QApplication.activeWindow().close()
+    if win := QApplication.activeWindow():
+        win.close()
     print("close")
 
 
diff --git a/demo/qapplication.py b/demo/qapplication.py
index 9989a36..236c575 100644
--- a/demo/qapplication.py
+++ b/demo/qapplication.py
@@ -1,6 +1,7 @@
 # Copyright (C) 2013 Riverbank Computing Limited.
 # Copyright (C) 2022 The Qt Company Ltd.
 # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+# pyright: reportOptionalMemberAccess=false
 
 from fonticon_fa6 import FA6S
 from qtpy.QtCore import QFile, QFileInfo, QSaveFile, Qt, QTextStream
@@ -204,7 +205,7 @@ def load_file(self, fileName: str) -> None:
             return
 
         inf = QTextStream(file)
-        QApplication.setOverrideCursor(Qt.WaitCursor)
+        QApplication.setOverrideCursor(Qt.CursorShape.WaitCursor)
         self._text_edit.setPlainText(inf.readAll())
         QApplication.restoreOverrideCursor()
 
@@ -213,11 +214,11 @@ def load_file(self, fileName: str) -> None:
 
     def save_file(self, fileName: str) -> bool:
         error = None
-        QApplication.setOverrideCursor(Qt.WaitCursor)
+        QApplication.setOverrideCursor(Qt.CursorShape.WaitCursor)
         file = QSaveFile(fileName)
         if file.open(QFile.OpenModeFlag.WriteOnly | QFile.OpenModeFlag.Text):
             outf = QTextStream(file)
-            outf << self._text_edit.toPlainText()
+            outf << self._text_edit.toPlainText()  # pyright: ignore
             if not file.commit():
                 reason = file.errorString()
                 error = f"Cannot write file {fileName}:\n{reason}."
@@ -255,4 +256,4 @@ def stripped_name(self, fullFileName: str) -> str:
     qapp.setAttribute(Qt.ApplicationAttribute.AA_DontShowIconsInMenus)
     main_win = MainWindow()
     main_win.show()
-    qapp.exec_()
+    qapp.exec()
diff --git a/docs/getting_started.md b/docs/getting_started.md
index d1adee2..6c71708 100644
--- a/docs/getting_started.md
+++ b/docs/getting_started.md
@@ -223,7 +223,7 @@ main.setModelMenuBar(['File'])
 main.addModelToolBar('File')
 main.show()
 
-app.exec_()
+app.exec()
 ```
 
 You should now have a QMainWindow with a menu bar and toolbar populated with
diff --git a/pyproject.toml b/pyproject.toml
index 94b609c..3376232 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,6 +79,7 @@ dev = [
     "pre-commit-uv>=4",
     "pyqt6>=6.8.0",
     "rich>=13.9.4",
+    "pyright>=1.1.402",
 ]
 docs = [
     "griffe-fieldz>=0.1.0",
@@ -174,6 +175,11 @@ disallow_untyped_defs = false
 module = ["qtpy.*"]
 implicit_reexport = true
 
+[tool.pyright]
+include = ["src", "demo"]
+reportArgumentType = "none" # hard with pydantic casting
+venvPath = "."
+
 # https://coverage.readthedocs.io/
 [tool.coverage.report]
 show_missing = true
diff --git a/src/app_model/_app.py b/src/app_model/_app.py
index 507ff3f..ded4504 100644
--- a/src/app_model/_app.py
+++ b/src/app_model/_app.py
@@ -7,6 +7,7 @@
 from types import MappingProxyType
 from typing import (
     TYPE_CHECKING,
+    Any,
     ClassVar,
     Literal,
     Optional,
@@ -28,8 +29,10 @@
 )
 
 if TYPE_CHECKING:
+    from typing import Callable
+
     from .expressions import Expr
-    from .registries._register import CommandCallable, CommandDecorator
+    from .registries._register import CommandDecorator
     from .types import (
         DisposeCallable,
         IconOrDict,
@@ -231,7 +234,7 @@ def register_action(
         action: str,
         title: str,
         *,
-        callback: CommandCallable,
+        callback: Callable[..., Any],
         category: str | None = ...,
         tooltip: str | None = ...,
         icon: IconOrDict | None = ...,
@@ -246,7 +249,7 @@ def register_action(
         action: str | Action,
         title: str | None = None,
         *,
-        callback: CommandCallable | None = None,
+        callback: Callable[..., Any] | None = None,
         category: str | None = None,
         tooltip: str | None = None,
         icon: IconOrDict | None = None,
diff --git a/src/app_model/backends/qt/_qaction.py b/src/app_model/backends/qt/_qaction.py
index fc4f37d..9dd5a65 100644
--- a/src/app_model/backends/qt/_qaction.py
+++ b/src/app_model/backends/qt/_qaction.py
@@ -137,9 +137,7 @@ class QMenuItemAction(QCommandRuleAction):
         Optional parent widget, by default None
     """
 
-    _cache: ClassVar[WeakValueDictionary[tuple[int, int], QMenuItemAction]] = (
-        WeakValueDictionary()
-    )
+    _cache: ClassVar[WeakValueDictionary[tuple[int, int], Self]] = WeakValueDictionary()
 
     def __init__(
         self,
diff --git a/src/app_model/backends/qt/_qkeymap.py b/src/app_model/backends/qt/_qkeymap.py
index 5d8638c..bcaf0db 100644
--- a/src/app_model/backends/qt/_qkeymap.py
+++ b/src/app_model/backends/qt/_qkeymap.py
@@ -1,11 +1,13 @@
 # mypy: disable-error-code="operator"
+# pyright: reportOperatorIssue=false
+
 from __future__ import annotations
 
 import operator
 from functools import reduce
 from typing import TYPE_CHECKING
 
-from qtpy import API, QT_VERSION
+from qtpy import API, QT_VERSION  # pyright: ignore[reportAttributeAccessIssue]
 from qtpy.QtCore import QCoreApplication, Qt
 from qtpy.QtGui import QKeySequence
 
@@ -239,7 +241,7 @@ def __init__(self, kb: KeyBinding) -> None:
 
 
 KEY_FROM_QT: MutableMapping[Qt.Key, KeyCode | KeyCombo] = {
-    v.toCombined() if hasattr(v, "toCombined") else int(v): k
+    v.toCombined() if hasattr(v, "toCombined") else int(v): k  # pyright: ignore
     for k, v in KEY_TO_QT.items()
     if k
 }
diff --git a/src/app_model/expressions/_expressions.py b/src/app_model/expressions/_expressions.py
index 8ec825e..a285659 100644
--- a/src/app_model/expressions/_expressions.py
+++ b/src/app_model/expressions/_expressions.py
@@ -414,7 +414,7 @@ class Constant(Expr[V], ast.Constant):
         The kind of constant.  This is used to provide type hints when
     """
 
-    value: V
+    value: V  # pyright: ignore[reportIncompatibleVariableOverride]
 
     def __init__(
         self, value: V, kind: str | None = None, **kwargs: Unpack[_Attributes]
diff --git a/src/app_model/registries/_menus_reg.py b/src/app_model/registries/_menus_reg.py
index b092933..79c6205 100644
--- a/src/app_model/registries/_menus_reg.py
+++ b/src/app_model/registries/_menus_reg.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, Callable, Final
+from typing import TYPE_CHECKING, Any, Callable, Final, cast
 
 from psygnal import Signal
 
@@ -64,7 +64,7 @@ def _dispose() -> None:
         return _dispose
 
     def append_menu_items(
-        self, items: Iterable[tuple[MenuId, MenuOrSubmenu]]
+        self, items: Iterable[tuple[MenuId, MenuOrSubmenu | dict]]
     ) -> DisposeCallable:
         """Append menu items to the registry.
 
@@ -81,7 +81,7 @@ def append_menu_items(
         changed_ids: set[str] = set()
         disposers: list[Callable[[], None]] = []
         for menu_id, item in items:
-            item = MenuItem._validate(item)  # type: ignore
+            item = cast("MenuOrSubmenu", MenuItem._validate(item))
             menu_dict = self._menu_items.setdefault(menu_id, {})
             menu_dict[item] = None
             changed_ids.add(menu_id)
diff --git a/src/app_model/registries/_register.py b/src/app_model/registries/_register.py
index 6186495..2c92648 100644
--- a/src/app_model/registries/_register.py
+++ b/src/app_model/registries/_register.py
@@ -49,7 +49,7 @@ def register_action(
     id_or_action: str,
     title: str,
     *,
-    callback: CommandCallable,
+    callback: Callable[..., Any],
     category: str | None = ...,
     tooltip: str | None = ...,
     icon: IconOrDict | None = ...,
@@ -65,7 +65,7 @@ def register_action(
     id_or_action: str | Action,
     title: str | None = None,
     *,
-    callback: CommandCallable | None = None,
+    callback: Callable[..., Any] | None = None,
     category: str | None = None,
     tooltip: str | None = None,
     icon: IconOrDict | None = None,
diff --git a/src/app_model/types/__init__.py b/src/app_model/types/__init__.py
index 72acf38..56a1a57 100644
--- a/src/app_model/types/__init__.py
+++ b/src/app_model/types/__init__.py
@@ -13,6 +13,7 @@
     KeyCode,
     KeyCombo,
     KeyMod,
+    ScanCode,
     SimpleKeyBinding,
     StandardKeyBinding,
 )
diff --git a/src/app_model/types/_action.py b/src/app_model/types/_action.py
index ce5ee6d..669e099 100644
--- a/src/app_model/types/_action.py
+++ b/src/app_model/types/_action.py
@@ -40,17 +40,17 @@ class Action(CommandRule, Generic[P, R]):
         "(e.g. `my_package.a_module:some_function`)",
     )
     menus: Optional[list[MenuRule]] = Field(
-        None,
+        default=None,
         description="(Optional) Menus to which this action should be added.  Note that "
         "menu items in the sequence may be supplied as a plain string, which will "
         "be converted to a `MenuRule` with the string as the `id` field.",
     )
     keybindings: Optional[list[KeyBindingRule]] = Field(
-        None,
+        default=None,
         description="(Optional) Default keybinding(s) that will trigger this command.",
     )
     palette: bool = Field(
-        True,
+        default=True,
         description="Whether to add this command to the global Command Palette "
         "during registration.",
     )
diff --git a/src/app_model/types/_command_rule.py b/src/app_model/types/_command_rule.py
index 0bd465f..df06d3e 100644
--- a/src/app_model/types/_command_rule.py
+++ b/src/app_model/types/_command_rule.py
@@ -12,12 +12,12 @@ class ToggleRule(_BaseModel):
     """More detailed description of a toggle rule."""
 
     condition: Optional[expressions.Expr] = Field(
-        None,
+        default=None,
         description="(Optional) Condition under which the command should appear "
         "checked/toggled in any GUI representation (like a menu or button).",
     )
     get_current: Optional[Callable[[], bool]] = Field(
-        None,
+        default=None,
         description="Function that returns the current state of the toggle.",
     )
 
@@ -38,20 +38,20 @@ class CommandRule(_BaseModel):
         description="Title by which the command is represented in the UI.",
     )
     category: Optional[str] = Field(
-        None,
+        default=None,
         description="(Optional) Category string by which the command may be grouped "
         "in the UI",
     )
     tooltip: Optional[str] = Field(
-        None, description="(Optional) Tooltip to show when hovered."
+        default=None, description="(Optional) Tooltip to show when hovered."
     )
     status_tip: Optional[str] = Field(
-        None,
+        default=None,
         description="(Optional) Help message to show in the status bar when a "
         "button representing this command is hovered (for backends that support it).",
     )
     icon: Optional[Icon] = Field(
-        None,
+        default=None,
         description="(Optional) Icon used to represent this command, e.g. on buttons "
         "or in menus. These may be [iconify keys](https://icon-sets.iconify.design), "
         "such as `fa6-solid:arrow-down`, or "
@@ -62,24 +62,24 @@ class CommandRule(_BaseModel):
         "`file:///` (three slashes)",
     )
     icon_visible_in_menu: bool = Field(
-        True,
+        default=True,
         description="Whether to show the icon in menus (for backends that support it). "
         "If `False`, only the title will be shown. By default, `True`.",
     )
     enablement: Optional[expressions.Expr] = Field(
-        None,
+        default=None,
         description="(Optional) Condition which must be true to enable the command in "
         "the UI (menu and keybindings). Does not prevent executing the command by "
         "other means, like the `execute_command` API.",
     )
     short_title: Optional[str] = Field(
-        None,
+        default=None,
         description="(Optional) Short title by which the command is represented in "
         "the UI. Menus pick either `title` or `short_title` depending on the context "
         "in which they show commands.",
     )
     toggled: Union[ToggleRule, expressions.Expr, None] = Field(
-        None,
+        default=None,
         description="(Optional) Condition under which the command should appear "
         "checked/toggled in any GUI representation (like a menu or button).",
     )
diff --git a/src/app_model/types/_icon.py b/src/app_model/types/_icon.py
index 1dc578f..a416728 100644
--- a/src/app_model/types/_icon.py
+++ b/src/app_model/types/_icon.py
@@ -14,7 +14,7 @@ class Icon(_BaseModel):
     """
 
     dark: Optional[str] = Field(
-        None,
+        default=None,
         description="Icon path when a dark theme is used. These may be "
         "[iconify keys](https://icon-sets.iconify.design), such as "
         "`fa6-solid:arrow-down`, or "
@@ -22,7 +22,7 @@ class Icon(_BaseModel):
         " keys, such as `fa6s.arrow_down`",
     )
     light: Optional[str] = Field(
-        None,
+        default=None,
         description="Icon path when a light theme is used. These may be "
         "[iconify keys](https://icon-sets.iconify.design), such as "
         "`fa6-solid:arrow-down`, or "
diff --git a/src/app_model/types/_keybinding_rule.py b/src/app_model/types/_keybinding_rule.py
index a184f79..f19d3de 100644
--- a/src/app_model/types/_keybinding_rule.py
+++ b/src/app_model/types/_keybinding_rule.py
@@ -29,28 +29,28 @@ class KeyBindingRule(_BaseModel):
     """
 
     primary: Optional[KeyEncoding] = Field(
-        None, description="(Optional) Key combo, (e.g. Ctrl+O)."
+        default=None, description="(Optional) Key combo, (e.g. Ctrl+O)."
     )
     win: Optional[KeyEncoding] = Field(
-        None, description="(Optional) Windows specific key combo."
+        default=None, description="(Optional) Windows specific key combo."
     )
     mac: Optional[KeyEncoding] = Field(
-        None, description="(Optional) MacOS specific key combo."
+        default=None, description="(Optional) MacOS specific key combo."
     )
     linux: Optional[KeyEncoding] = Field(
-        None, description="(Optional) Linux specific key combo."
+        default=None, description="(Optional) Linux specific key combo."
     )
     when: Optional[expressions.Expr] = Field(
-        None,
+        default=None,
         description="(Optional) Condition when the keybingding is active.",
     )
     weight: int = Field(
-        0,
+        default=0,
         description="Internal weight used to sort keybindings. "
         "This is not part of the plugin schema",
     )
     source: KeyBindingSource = Field(
-        KeyBindingSource.APP,
+        default=KeyBindingSource.APP,
         description="Who registered the keybinding. Used to sort keybindings.",
     )
 
diff --git a/src/app_model/types/_keys/_key_codes.py b/src/app_model/types/_keys/_key_codes.py
index d0f6ecc..7e6c3cf 100644
--- a/src/app_model/types/_keys/_key_codes.py
+++ b/src/app_model/types/_keys/_key_codes.py
@@ -750,7 +750,7 @@ def __or__(self, other: KeyCode) -> "KeyCombo": ...
     @overload
     def __or__(self, other: int) -> int: ...
 
-    def __or__(
+    def __or__(  # pyright: ignore[reportIncompatibleMethodOverride]
         self, other: Union["KeyMod", KeyCode, int]
     ) -> Union["KeyMod", "KeyCombo", int]:
         if isinstance(other, self.__class__):
diff --git a/src/app_model/types/_menu_rule.py b/src/app_model/types/_menu_rule.py
index 535deb4..5ec9f88 100644
--- a/src/app_model/types/_menu_rule.py
+++ b/src/app_model/types/_menu_rule.py
@@ -20,18 +20,18 @@ class MenuItemBase(_BaseModel):
     """Data representing where and when a menu item should be shown."""
 
     when: Optional[expressions.Expr] = Field(
-        None,
+        default=None,
         description="(Optional) Condition which must be true to show the item.",
     )
     group: Optional[str] = Field(
-        None,
+        default=None,
         description="(Optional) Menu group to which this item should be added. Menu "
         "groups are sortable strings (like `'1_cutandpaste'`). 'navigation' is a "
         "special group that always appears at the top of a menu.  If not provided, "
         "the item is added in the last group of the menu.",
     )
     order: Optional[float] = Field(
-        None,
+        default=None,
         description="(Optional) Order of the item *within* its group. Note, order is "
         "not part of the plugin schema, plugins may provide it using the group key "
         "and the syntax 'group@order'.  If not provided, items are sorted by title.",
@@ -90,7 +90,7 @@ class MenuItem(MenuItemBase):
         description="CommandRule to execute when this menu item is selected.",
     )
     alt: Optional[CommandRule] = Field(
-        None,
+        default=None,
         description="(Optional) Alternate command to execute when this menu item is "
         "selected, (e.g. when the Alt-key is held when opening the menu)",
     )
@@ -108,7 +108,7 @@ class SubmenuItem(MenuItemBase):
     submenu: str = Field(..., description="Menu to insert as a submenu.")
     title: str = Field(..., description="Title of this submenu, shown in the UI.")
     icon: Optional[Icon] = Field(
-        None,
+        default=None,
         description="(Optional) Icon used to represent this submenu. "
         "These may be [iconify keys](https://icon-sets.iconify.design), "
         "such as `fa6-solid:arrow-down`, or "
@@ -116,7 +116,7 @@ class SubmenuItem(MenuItemBase):
         " keys, such as `fa6s.arrow_down`",
     )
     enablement: Optional[expressions.Expr] = Field(
-        None,
+        default=None,
         description="(Optional) Condition which must be true to enable the submenu. "
         "Disabled submenus appear grayed out in the UI, and cannot be selected. By "
         "default, submenus are enabled.",
diff --git a/tests/test_qt/test_demos.py b/tests/test_qt/test_demos.py
index 45a3fa0..7fa13ae 100644
--- a/tests/test_qt/test_demos.py
+++ b/tests/test_qt/test_demos.py
@@ -9,5 +9,5 @@
 
 @pytest.mark.parametrize("fname", ["qapplication.py", "model_app.py", "multi_file"])
 def test_qapp(qapp, fname, monkeypatch) -> None:
-    monkeypatch.setattr(QApplication, "exec_", lambda *a, **k: None)
+    monkeypatch.setattr(QApplication, "exec", lambda *a, **k: None)
     runpy.run_path(str(DEMO / fname), run_name="__main__")
diff --git a/tests/test_qt/test_qkeymap.py b/tests/test_qt/test_qkeymap.py
index e088be1..2afaa2d 100644
--- a/tests/test_qt/test_qkeymap.py
+++ b/tests/test_qt/test_qkeymap.py
@@ -1,3 +1,5 @@
+# mypy: disable-error-code="operator"
+# pyright: reportOperatorIssue=false
 from unittest.mock import patch
 
 from qtpy.QtCore import Qt
diff --git a/tests/test_registries.py b/tests/test_registries.py
index 98c39ab..a011fa3 100644
--- a/tests/test_registries.py
+++ b/tests/test_registries.py
@@ -1,3 +1,4 @@
+# mypy: disable-error-code="var-annotated"
 import pytest
 
 from app_model.registries import KeyBindingsRegistry, MenusRegistry
@@ -13,6 +14,10 @@
 )
 
 
+def _noop() -> None:
+    pass
+
+
 def test_menus_registry() -> None:
     reg = MenusRegistry()
     reg.append_menu_items([("file", {"command": {"id": "file.new", "title": "File"}})])
@@ -33,7 +38,7 @@ def test_register_keybinding_rule_filter_type() -> None:
     """Check `_filter_keybinding` type checking when setting."""
     reg = KeyBindingsRegistry()
     with pytest.raises(TypeError, match="'filter_keybinding' must be a callable"):
-        reg.filter_keybinding = "string"
+        reg.filter_keybinding = "string"  # type: ignore
 
 
 def _filter_fun(kb: KeyBinding) -> str:
@@ -79,7 +84,7 @@ def test_register_keybinding_rule_filter() -> None:
         ),
     ],
 )
-def test_register_action_keybindings_filter(kb, msg) -> None:
+def test_register_action_keybindings_filter(kb: list[dict], msg: str) -> None:
     """Check `filter_keybinding` in `register_action_keybindings`."""
     reg = KeyBindingsRegistry()
     reg.filter_keybinding = _filter_fun
@@ -87,7 +92,7 @@ def test_register_action_keybindings_filter(kb, msg) -> None:
     action = Action(
         id="cmd_id1",
         title="title1",
-        callback=lambda: None,
+        callback=_noop,
         keybindings=kb,
     )
     if msg:
@@ -119,14 +124,14 @@ def test_register_action_keybindings_filter(kb, msg) -> None:
         ),
     ],
 )
-def test_register_action_keybindings_priorization(kb1, kb2, kb3) -> None:
+def test_register_action_keybindings_priorization(kb1: str, kb2: str, kb3: str) -> None:
     """Check `get_context_prioritized_keybinding`."""
     reg = KeyBindingsRegistry()
 
     action1 = Action(
         id="cmd_id1",
         title="title1",
-        callback=lambda: None,
+        callback=_noop,
         keybindings=kb1,
     )
     reg.register_action_keybindings(action1)
@@ -134,7 +139,7 @@ def test_register_action_keybindings_priorization(kb1, kb2, kb3) -> None:
     action2 = Action(
         id="cmd_id2",
         title="title2",
-        callback=lambda: None,
+        callback=_noop,
         keybindings=kb2,
     )
     reg.register_action_keybindings(action2)
@@ -142,7 +147,7 @@ def test_register_action_keybindings_priorization(kb1, kb2, kb3) -> None:
     action3 = Action(
         id="cmd_id3",
         title="title3",
-        callback=lambda: None,
+        callback=_noop,
         keybindings=kb3,
     )
     reg.register_action_keybindings(action3)
@@ -244,7 +249,9 @@ def test_register_action_keybindings_priorization(kb1, kb2, kb3) -> None:
         ),
     ],
 )
-def test_registered_keybinding_comparison(kb1, kb2, gt, lt, eq) -> None:
+def test_registered_keybinding_comparison(
+    kb1: dict, kb2: dict, gt: bool, lt: bool, eq: bool
+) -> None:
     rkb1 = _RegisteredKeyBinding(
         keybinding=kb1["primary"],
         command_id=kb1["command_id"],