diff --git a/meson.build b/meson.build
index 23f79e9..0cce3df 100644
--- a/meson.build
+++ b/meson.build
@@ -6,15 +6,15 @@ project('cthulhu',
 python = import('python')
 i18n = import('i18n')
 
-python_minimum_version = '3.9'
+python_minimum_version = '3.10'
 python3 = python.find_installation('python3', required: true)
 if not python3.language_version().version_compare(f'>= @python_minimum_version@')
   error(f'Python @python_minimum_version@ or newer is required.')
 endif
 
 # Hard dependencies (checked via pkg-config)
-dependency('atspi-2', version: '>= 2.52.0')
-dependency('atk-bridge-2.0', version: '>= 2.26.0')
+dependency('atspi-2', version: '>= 2.56.0')
+dependency('atk-bridge-2.0', version: '>= 2.56.0')
 dependency('pygobject-3.0', version: '>= 3.18')
 
 # Hard Python module dependencies
@@ -33,14 +33,19 @@ if not pluggy_result.found()
   error('pluggy module is required')
 endif
 
+dasbus_result = python.find_installation('python3', modules:['dasbus'], required: false)
+if not dasbus_result.found()
+  error('dasbus is required for D-Bus remote controller interface')
+endif
+
 # End users might not have the Gtk development libraries installed, making pkg-config fail.
 # Therefore, check this dependency via python.
 gtk_major_version = '3'
-gtk_minor_version = '0'
+gtk_minor_version = '24'
 gtk_command = ' '.join([
   'import gi; gi.require_version("Gtk", "3.0"); from gi.repository import Gtk;',
   'print(f"{Gtk.get_major_version()}.{Gtk.get_minor_version()}.{Gtk.get_micro_version()}");',
-  f'failed = Gtk.get_major_version() != @gtk_major_version@;',
+  f'failed = Gtk.get_major_version() != @gtk_major_version@ or Gtk.get_minor_version() < @gtk_minor_version@;',
   'exit(failed)'
 ])
 gtk_test = run_command(python3, '-c', gtk_command, check: false)
diff --git a/pyproject.toml b/pyproject.toml
index 2e31090..7643916 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,12 +7,13 @@ name = "cthulhu"
 dynamic = ["version"]
 description = "Fork of the Orca screen reader"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = { text = "LGPL-2.1-or-later" }
 dependencies = [
     "pygobject>=3.18",
     "pluggy",
     "tomlkit",
+    "dasbus",
     "brlapi; extra == 'braille'",
     "python-speechd; extra == 'speech'",
     "piper-tts; extra == 'piper'",
diff --git a/tests/conftest.py b/tests/conftest.py
index eada025..790b160 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,8 +1,12 @@
 import importlib.util
+import os
 import sys
 import types
 from pathlib import Path
 
+import pytest
+
+os.environ["GSETTINGS_BACKEND"] = "memory"
 
 REPO_ROOT = Path(__file__).resolve().parents[1]
 SRC_ROOT = REPO_ROOT / "src"
@@ -63,3 +67,27 @@ for generated_module in ("cthulhu_i18n", "cthulhu_platform"):
     loaded_module = _load_generated_module(generated_module)
     sys.modules[f"cthulhu.{generated_module}"] = loaded_module
     setattr(cthulhu, generated_module, loaded_module)
+
+
+from cthulhu_test_fixtures import test_context  # noqa: E402,F401
+
+
+def clean_all_cthulhu_modules() -> None:
+    modules_to_remove = [
+        module_name
+        for module_name in sys.modules
+        if module_name.startswith("cthulhu.")
+        and module_name not in {"cthulhu.cthulhu_i18n", "cthulhu.cthulhu_platform"}
+    ]
+    for module_name in modules_to_remove:
+        sys.modules.pop(module_name, None)
+
+
+def pytest_configure(config: pytest.Config) -> None:
+    config.addinivalue_line("markers", "unit: marks tests as unit tests")
+
+
+def pytest_runtest_setup(item: pytest.Item) -> None:
+    clean_all_cthulhu_modules()
+    if str(SRC_ROOT) not in sys.path:
+        sys.path.insert(0, str(SRC_ROOT))
diff --git a/tests/cthulhu_test_context.py b/tests/cthulhu_test_context.py
new file mode 100644
index 0000000..8ca1167
--- /dev/null
+++ b/tests/cthulhu_test_context.py
@@ -0,0 +1,306 @@
+# Orca Test Context - Test Isolation Framework
+#
+# Copyright 2025 Igalia, S.L.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the
+# Free Software Foundation, Inc., Franklin Street, Fifth Floor,
+# Boston MA  02110-1301 USA.
+
+"""Test isolation framework for Cthulhu screen reader tests."""
+
+from __future__ import annotations
+
+import os
+import sys
+from typing import TYPE_CHECKING, Any
+
+import gi
+
+gi.require_version("Atspi", "2.0")
+gi.require_version("Gio", "2.0")
+from gi.repository import Atspi, Gio, GLib  # pylint: disable=wrong-import-position
+
+if TYPE_CHECKING:
+    from unittest.mock import MagicMock
+
+    from _pytest.monkeypatch import MonkeyPatch
+    from pytest_mock import MockerFixture
+
+
+class CthulhuTestContext:
+    """Test isolation framework for Cthulhu tests."""
+
+    def __init__(self, mocker: MockerFixture, monkeypatch: MonkeyPatch):
+        """Initialize the test context."""
+
+        self.mocker: MockerFixture = mocker
+        self.monkeypatch: MonkeyPatch = monkeypatch
+        self.patches: dict[str, Any] = {}
+        self.mocks: dict[str, MagicMock] = {}
+
+    def patch(self, target: str, **kwargs) -> MagicMock:
+        """Convenience method for creating patches."""
+
+        return self.mocker.patch(target, **kwargs)
+
+    def patch_object(self, target: object, attribute: str, **kwargs) -> MagicMock:
+        """Convenience method for patching object attributes."""
+
+        return self.mocker.patch.object(target, attribute, **kwargs)
+
+    def Mock(self, **kwargs) -> MagicMock:  # pylint: disable=invalid-name
+        """Convenience method for creating Mock objects."""
+
+        return self.mocker.Mock(**kwargs)
+
+    def patch_env(
+        self,
+        env_vars: dict[str, str],
+        remove_vars: list[str] | None = None,
+    ) -> MagicMock | None:
+        """Convenience method for patching environment variables."""
+
+        if remove_vars:
+            for var in remove_vars:
+                if var in os.environ:
+                    del os.environ[var]
+
+        if env_vars:
+            return self.mocker.patch.dict(os.environ, env_vars)
+        return None
+
+    def patch_module(self, module_name: str, mock_module: Any) -> MagicMock:
+        """Convenience method for patching sys.modules entries."""
+
+        return self.mocker.patch.dict(sys.modules, {module_name: mock_module})
+
+    def patch_modules(self, modules: dict[str, Any]) -> MagicMock:
+        """Convenience method for patching multiple sys.modules entries."""
+
+        return self.mocker.patch.dict(sys.modules, modules)
+
+    def _setup_required_imports(self) -> None:
+        """Sets up commonly required module imports that real modules need."""
+
+        required_modules = [
+            "cthulhu.cthulhu_i18n",
+            "cthulhu.cmdnames",
+            "cthulhu.input_event",
+            "cthulhu.keybindings",
+            "cthulhu.messages",
+            "cthulhu.text_attribute_names",
+        ]
+
+        for module_name in required_modules:
+            if module_name not in self.mocks:
+                mock_module = self.mocker.patch(module_name, create=True)
+                if module_name == "cthulhu.cthulhu_i18n":
+                    mock_module._ = lambda x: x
+                self.mocks[module_name] = mock_module
+
+    def _setup_essential_modules(self, module_names: list[str]) -> dict[str, MagicMock]:
+        """Returns dictionary mapping module names to mock objects."""
+
+        essential_modules = {}
+        for module_name in module_names:
+            mock_module = self.mocker.Mock()
+            self.patch_module(module_name, mock_module)
+            essential_modules[module_name] = mock_module
+        return essential_modules
+
+    def setup_shared_dependencies(
+        self,
+        additional_modules: list[str] | None = None,
+    ) -> dict[str, MagicMock]:
+        """Returns common/shared dependencies used across most Orca test modules."""
+
+        core_modules = [
+            "cthulhu.debug",
+            "cthulhu.messages",
+            "cthulhu.input_event",
+            "cthulhu.keybindings",
+            "cthulhu.cmdnames",
+            "cthulhu.ax_object",
+            "cthulhu.dbus_service",
+            "cthulhu.script_manager",
+            "cthulhu.cthulhu_i18n",
+            "cthulhu.guilabels",
+            "cthulhu.text_attribute_names",
+            "cthulhu.focus_manager",
+            "cthulhu.braille",
+            "cthulhu.cthulhu_platform",
+        ]
+
+        if additional_modules:
+            core_modules.extend(additional_modules)
+
+        essential_modules = self._setup_essential_modules(core_modules)
+        self.configure_shared_module_behaviors(essential_modules)
+        return essential_modules
+
+    # pylint: disable-next=too-many-locals, too-many-statements, too-many-branches
+    def configure_shared_module_behaviors(self, essential_modules: dict[str, MagicMock]) -> None:
+        """Configure standard behaviors for shared modules to reduce duplication."""
+
+        if "cthulhu.cthulhu_i18n" in essential_modules:
+            i18n_mock = essential_modules["cthulhu.cthulhu_i18n"]
+            i18n_mock._ = lambda x: x
+            i18n_mock.C_ = lambda c, x: x
+            i18n_mock.ngettext = lambda s, p, n: s if n == 1 else p
+
+        if "cthulhu.debug" in essential_modules:
+            debug_mock = essential_modules["cthulhu.debug"]
+            debug_mock.LEVEL_INFO = 800
+            debug_mock.LEVEL_SEVERE = 1000
+            debug_mock.print_message = self.mocker.Mock()
+            debug_mock.print_tokens = self.mocker.Mock()
+            debug_mock.println = self.mocker.Mock()
+
+        if "cthulhu.keybindings" in essential_modules:
+            keybindings_mock = essential_modules["cthulhu.keybindings"]
+            bindings_instance = self.mocker.Mock()
+            bindings_instance.is_empty = self.mocker.Mock(return_value=True)
+            bindings_instance.add = self.mocker.Mock()
+            keybindings_mock.KeyBindings = self.mocker.Mock(return_value=bindings_instance)
+            keybindings_mock.KeyBinding = self.mocker.Mock(return_value=self.mocker.Mock())
+            keybindings_mock.DEFAULT_MODIFIER_MASK = 1
+            keybindings_mock.CTHULHU_SHIFT_MODIFIER_MASK = 2
+
+        if "cthulhu.focus_manager" in essential_modules:
+            focus_manager_mock = essential_modules["cthulhu.focus_manager"]
+            manager_instance = self.mocker.Mock()
+            manager_instance.get_locus_of_focus = self.mocker.Mock(return_value=None)
+            manager_instance.set_locus_of_focus = self.mocker.Mock()
+            manager_instance.in_say_all = self.mocker.Mock(return_value=False)
+            manager_instance.is_in_preferences_window = self.mocker.Mock(return_value=False)
+            manager_instance.get_active_mode_and_object_of_interest = self.mocker.Mock(
+                return_value=(None, None),
+            )
+            focus_manager_mock.get_manager = self.mocker.Mock(return_value=manager_instance)
+            focus_manager_mock.OBJECT_NAVIGATOR = "object-navigator"
+            essential_modules["focus_manager_instance"] = manager_instance
+
+        if "cthulhu.dbus_service" in essential_modules:
+            dbus_service_mock = essential_modules["cthulhu.dbus_service"]
+            controller_mock = self.mocker.Mock()
+            controller_mock.register_decorated_module = self.mocker.Mock()
+            dbus_service_mock.get_remote_controller = self.mocker.Mock(return_value=controller_mock)
+            dbus_service_mock.command = lambda func: func
+            dbus_service_mock.getter = lambda func: func
+            dbus_service_mock.setter = lambda func: func
+            dbus_service_mock.parameterized_command = lambda func: func
+
+        if "cthulhu.script_manager" in essential_modules:
+            script_manager_mock = essential_modules["cthulhu.script_manager"]
+            manager_instance = self.mocker.Mock()
+            script_instance = self.mocker.Mock()
+            script_instance.present_message = self.mocker.Mock()
+            script_instance.present_object = self.mocker.Mock()
+            script_instance.speak_message = self.mocker.Mock()
+            script_instance.update_braille = self.mocker.Mock()
+            speech_gen = self.mocker.Mock()
+            braille_gen = self.mocker.Mock()
+            script_instance.get_speech_generator = self.mocker.Mock(return_value=speech_gen)
+            script_instance.get_braille_generator = self.mocker.Mock(return_value=braille_gen)
+            manager_instance.get_active_script = self.mocker.Mock(return_value=script_instance)
+            manager_instance.get_script = self.mocker.Mock(return_value=script_instance)
+            manager_instance.get_manager = self.mocker.Mock(return_value=manager_instance)
+            script_manager_mock.get_manager = self.mocker.Mock(return_value=manager_instance)
+
+        if "cthulhu.ax_object" in essential_modules:
+            ax_object_mock = essential_modules["cthulhu.ax_object"]
+            ax_object_class_mock = self.mocker.Mock()
+            ax_object_class_mock.is_valid = self.mocker.Mock(return_value=True)
+            ax_object_class_mock.is_dead = self.mocker.Mock(return_value=False)
+            ax_object_class_mock.get_name = self.mocker.Mock(return_value="")
+            ax_object_class_mock.get_role = self.mocker.Mock(return_value=Atspi.Role.PANEL)
+            ax_object_class_mock.get_parent = self.mocker.Mock(return_value=None)
+            ax_object_class_mock.find_ancestor = self.mocker.Mock(return_value=None)
+            ax_object_class_mock.clear_cache = self.mocker.Mock()
+            ax_object_mock.AXObject = ax_object_class_mock
+
+        if "cthulhu.ax_utilities" in essential_modules:
+            ax_utilities_mock = essential_modules["cthulhu.ax_utilities"]
+            ax_utilities_class_mock = self.mocker.Mock()
+            ax_utilities_class_mock.is_focused = self.mocker.Mock(return_value=True)
+            ax_utilities_class_mock.is_table_cell_or_header = self.mocker.Mock(return_value=False)
+            ax_utilities_class_mock.is_list_item = self.mocker.Mock(return_value=False)
+            ax_utilities_class_mock.is_layout_only = self.mocker.Mock(return_value=False)
+            ax_utilities_class_mock.get_status_bar = self.mocker.Mock(return_value=None)
+            ax_utilities_class_mock.get_info_bar = self.mocker.Mock(return_value=None)
+            ax_utilities_class_mock.is_showing = self.mocker.Mock(return_value=True)
+            ax_utilities_class_mock.is_visible = self.mocker.Mock(return_value=True)
+            ax_utilities_class_mock.is_sensitive = self.mocker.Mock(return_value=True)
+            ax_utilities_mock.AXUtilities = ax_utilities_class_mock
+
+        if "cthulhu.input_event" in essential_modules:
+            input_event_mock = essential_modules["cthulhu.input_event"]
+            input_event_mock.KEY_PRESSED_EVENT = "key-pressed"
+            input_event_mock.KEY_RELEASED_EVENT = "key-released"
+            input_event_mock.MOUSE_BUTTON_CLICKED_EVENT = "mouse-clicked"
+
+        if "cthulhu.cthulhu_platform" in essential_modules:
+            cthulhu_platform_mock = essential_modules["cthulhu.cthulhu_platform"]
+            cthulhu_platform_mock.tablesdir = "/usr/share/liblouis/tables"
+
+        if "cthulhu.braille_presenter" in essential_modules:
+            braille_presenter_mock = essential_modules["cthulhu.braille_presenter"]
+            presenter_instance = self.mocker.Mock()
+            presenter_instance.use_braille = self.mocker.Mock(return_value=False)
+            presenter_instance.get_braille_is_enabled = self.mocker.Mock(return_value=False)
+            presenter_instance.get_flash_messages_are_enabled = self.mocker.Mock(return_value=False)
+            presenter_instance.get_flash_messages_are_detailed = self.mocker.Mock(
+                return_value=False,
+            )
+            presenter_instance.get_flashtime_from_settings = self.mocker.Mock(return_value=5000)
+            braille_presenter_mock.get_presenter = self.mocker.Mock(return_value=presenter_instance)
+
+        if "cthulhu.presentation_manager" in essential_modules:
+            presentation_manager_mock = essential_modules["cthulhu.presentation_manager"]
+            manager_instance = self.mocker.Mock()
+            manager_instance.interrupt_presentation = self.mocker.Mock()
+            manager_instance.present_message = self.mocker.Mock()
+            manager_instance.speak_message = self.mocker.Mock()
+            manager_instance.speak_character = self.mocker.Mock()
+            manager_instance.present_braille_message = self.mocker.Mock()
+            manager_instance.spell_item = self.mocker.Mock()
+            manager_instance.spell_phonetically = self.mocker.Mock()
+            manager_instance.play_sound = self.mocker.Mock()
+            manager_instance.speak_contents = self.mocker.Mock()
+            manager_instance.display_contents = self.mocker.Mock()
+            presentation_manager_mock.get_manager = self.mocker.Mock(return_value=manager_instance)
+
+        if "gi.repository" in essential_modules:
+            gi_repo_mock = essential_modules["gi.repository"]
+            gi_repo_mock.Gio = Gio
+            gi_repo_mock.GLib = GLib
+
+    def get_mock(self, name: str) -> MagicMock | None:
+        """Returns mock object if it exists, None otherwise."""
+
+        return self.mocks.get(name)
+
+    def __enter__(self) -> CthulhuTestContext:  # noqa: PYI034
+        """Enter the test context."""
+
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb) -> None:
+        """Exit the test context and clean up all patches."""
+
+        for patch_obj in self.patches.values():
+            patch_obj.stop()
+
+        self.patches.clear()
+        self.mocks.clear()
diff --git a/tests/cthulhu_test_fixtures.py b/tests/cthulhu_test_fixtures.py
new file mode 100644
index 0000000..a94248c
--- /dev/null
+++ b/tests/cthulhu_test_fixtures.py
@@ -0,0 +1,85 @@
+# Orca Test Fixtures - Pytest Integration
+#
+# Copyright 2025 Igalia, S.L.
+# Author: Joanmarie Diggs <jdiggs@igalia.com>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the
+# Free Software Foundation, Inc., Franklin Street, Fifth Floor,
+# Boston MA  02110-1301 USA.
+
+"""Pytest fixtures for Cthulhu screen reader tests.
+
+This module provides pytest fixtures that integrate the CthulhuTestContext
+with pytest's fixture system, providing clean, isolated test environments.
+
+The fixtures are designed to be simple to use while providing complete
+test isolation and preventing cross-test contamination.
+
+Usage:
+    def test_presenter(orca_test):
+        cthulhu_test.setup_where_am_i_presenter_dependencies()
+        from cthulhu.where_am_i_presenter import WhereAmIPresenter
+
+        presenter = WhereAmIPresenter()
+        result = presenter.some_method()
+        assert result is True
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import pytest
+
+from cthulhu_test_context import CthulhuTestContext
+
+if TYPE_CHECKING:
+    from collections.abc import Generator
+
+    from pytest_mock import MockerFixture
+
+
+@pytest.fixture
+def test_context(mocker: MockerFixture, monkeypatch) -> Generator[CthulhuTestContext, None, None]:
+    """Provides clean, isolated Orca test environment.
+
+    This is the primary fixture for Cthulhu tests. It provides a complete
+    test isolation context that prevents cross-test contamination.
+
+    Usage:
+        class TestMyModule:
+            def _setup_dependencies(self, cthulhu_test):
+                # Set up only what your module needs
+                return cthulhu_test.setup_shared_dependencies(["cthulhu.debug"])
+
+            def test_my_functionality(self, cthulhu_test):
+                self._setup_dependencies(orca_test)
+                from cthulhu.my_module import MyClass
+
+                # Your test code here
+                instance = MyClass()
+                result = instance.some_method()
+
+                assert result is True
+
+    Args:
+        mocker: pytest-mock mocker fixture (automatically injected)
+        monkeypatch: pytest monkeypatch fixture (automatically injected)
+
+    Yields:
+        CthulhuTestContext instance with clean isolation
+    """
+
+    with CthulhuTestContext(mocker, monkeypatch) as context:
+        yield context