diff --git a/custom_components/nestquest/__init__.py b/custom_components/nestquest/__init__.py
index 4ffccf8..a3753ea 100644
--- a/custom_components/nestquest/__init__.py
+++ b/custom_components/nestquest/__init__.py
@@ -2,22 +2,27 @@
 from __future__ import annotations
 
 import logging
-from homeassistant.core import HomeAssistant
+from typing import Any
+
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
 
 from .const import DOMAIN
 
 _LOGGER = logging.getLogger(__name__)
 
-async def async_setup(hass: HomeAssistant, config: dict) -> bool:
-    """Set up the NestQuest component from YAML (not supported)."""
+
+async def async_setup(hass: HomeAssistant, config: dict[str, Any]) -> bool:
+    """Set up the NestQuest integration. YAML configuration is not used, returns True."""
     return True
 
+
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up NestQuest from a config entry."""
     hass.data.setdefault(DOMAIN, {})
     return True
 
+
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
     return True
diff --git a/pyproject.toml b/pyproject.toml
index 64967c1..c34f265 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,10 @@ version = "0.1.0"
 description = "NestQuest Home Assistant Integration"
 readme = "README.md"
 requires-python = ">=3.11"
-dependencies = [
+dependencies = []
+
+[dependency-groups]
+dev = [
     "pytest>=8.0.0",
 ]
 
diff --git a/tests/test_manifest.py b/tests/test_manifest.py
index ee5bb13..e442a23 100644
--- a/tests/test_manifest.py
+++ b/tests/test_manifest.py
@@ -3,9 +3,17 @@ from __future__ import annotations
 
 import json
 from pathlib import Path
+import sys
+from unittest.mock import MagicMock
+
+# Mock homeassistant modules if not installed in environment
+for _mod in ("homeassistant", "homeassistant.core", "homeassistant.config_entries"):
+    sys.modules.setdefault(_mod, MagicMock())
 
 import pytest
 
+from custom_components.nestquest.const import DOMAIN
+
 MANIFEST_PATH = Path(__file__).parent.parent / "custom_components" / "nestquest" / "manifest.json"
 
 
@@ -28,6 +36,17 @@ def test_manifest_domain(manifest: dict) -> None:
     assert manifest.get("domain") == "nestquest"
 
 
+def test_manifest_domain_matches_const(manifest: dict) -> None:
+    """Verify domain matches DOMAIN constant from const.py."""
+    assert manifest.get("domain") == DOMAIN
+
+
+def test_manifest_version(manifest: dict) -> None:
+    """Verify version is a non-empty string."""
+    assert isinstance(manifest.get("version"), str)
+    assert len(manifest["version"]) > 0
+
+
 def test_manifest_config_flow(manifest: dict) -> None:
     """Verify config_flow is True."""
     assert manifest.get("config_flow") is True