diff --git a/homeassistant/components/alarmdecoder/config_flow.py b/homeassistant/components/alarmdecoder/config_flow.py
index 52d17e407b7..9a4b9ae1098 100644
--- a/homeassistant/components/alarmdecoder/config_flow.py
+++ b/homeassistant/components/alarmdecoder/config_flow.py
@@ -54,7 +54,7 @@ class AlarmDecoderFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize AlarmDecoder ConfigFlow."""
         self.protocol = None
 
diff --git a/homeassistant/components/ambiclimate/config_flow.py b/homeassistant/components/ambiclimate/config_flow.py
index bde5e41e392..16d790cc09c 100644
--- a/homeassistant/components/ambiclimate/config_flow.py
+++ b/homeassistant/components/ambiclimate/config_flow.py
@@ -45,7 +45,7 @@ class AmbiclimateFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self._registered_view = False
         self._oauth = None
diff --git a/homeassistant/components/azure_devops/config_flow.py b/homeassistant/components/azure_devops/config_flow.py
index a654dc2be61..81cfc2e8d45 100644
--- a/homeassistant/components/azure_devops/config_flow.py
+++ b/homeassistant/components/azure_devops/config_flow.py
@@ -19,7 +19,7 @@ class AzureDevOpsFlowHandler(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize config flow."""
         self._organization: str | None = None
         self._project: str | None = None
diff --git a/homeassistant/components/azure_event_hub/config_flow.py b/homeassistant/components/azure_event_hub/config_flow.py
index c789b85aebb..3573d5e72aa 100644
--- a/homeassistant/components/azure_event_hub/config_flow.py
+++ b/homeassistant/components/azure_event_hub/config_flow.py
@@ -84,7 +84,7 @@ class AEHConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION: int = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the config flow."""
         self._data: dict[str, Any] = {}
         self._options: dict[str, Any] = deepcopy(DEFAULT_OPTIONS)
diff --git a/homeassistant/components/bbox/sensor.py b/homeassistant/components/bbox/sensor.py
index 6dcc89dca02..4e89788ddae 100644
--- a/homeassistant/components/bbox/sensor.py
+++ b/homeassistant/components/bbox/sensor.py
@@ -184,7 +184,7 @@ class BboxSensor(SensorEntity):
 class BboxData:
     """Get data from the Bbox."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the data object."""
         self.data = None
         self.router_infos = None
diff --git a/homeassistant/components/blink/config_flow.py b/homeassistant/components/blink/config_flow.py
index 30ef294f515..3fd1b7d91e5 100644
--- a/homeassistant/components/blink/config_flow.py
+++ b/homeassistant/components/blink/config_flow.py
@@ -72,7 +72,7 @@ class BlinkConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 3
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the blink flow."""
         self.auth = None
 
diff --git a/homeassistant/components/broadlink/config_flow.py b/homeassistant/components/broadlink/config_flow.py
index 39c470ad77b..531119db6df 100644
--- a/homeassistant/components/broadlink/config_flow.py
+++ b/homeassistant/components/broadlink/config_flow.py
@@ -31,7 +31,7 @@ class BroadlinkFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the Broadlink flow."""
         self.device = None
 
diff --git a/homeassistant/components/ecobee/config_flow.py b/homeassistant/components/ecobee/config_flow.py
index ffef5798d1b..cce39a9ce92 100644
--- a/homeassistant/components/ecobee/config_flow.py
+++ b/homeassistant/components/ecobee/config_flow.py
@@ -20,7 +20,7 @@ class EcobeeFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the ecobee flow."""
         self._ecobee = None
 
diff --git a/homeassistant/components/econet/config_flow.py b/homeassistant/components/econet/config_flow.py
index eebfa066a92..d25ee7973fd 100644
--- a/homeassistant/components/econet/config_flow.py
+++ b/homeassistant/components/econet/config_flow.py
@@ -14,7 +14,7 @@ class EcoNetFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the config flow."""
         self.data_schema = vol.Schema(
             {
diff --git a/homeassistant/components/enocean/config_flow.py b/homeassistant/components/enocean/config_flow.py
index d4009e7c400..e47cb4c0589 100644
--- a/homeassistant/components/enocean/config_flow.py
+++ b/homeassistant/components/enocean/config_flow.py
@@ -15,7 +15,7 @@ class EnOceanFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
     VERSION = 1
     MANUAL_PATH_VALUE = "Custom path"
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the EnOcean config flow."""
         self.dongle_path = None
         self.discovery_info = None
diff --git a/homeassistant/components/flume/config_flow.py b/homeassistant/components/flume/config_flow.py
index 049b702dc3c..e31519738d1 100644
--- a/homeassistant/components/flume/config_flow.py
+++ b/homeassistant/components/flume/config_flow.py
@@ -83,7 +83,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Init flume config flow."""
         self._reauth_unique_id = None
 
diff --git a/homeassistant/components/forked_daapd/config_flow.py b/homeassistant/components/forked_daapd/config_flow.py
index f9282dfc464..84ddbbc7f0e 100644
--- a/homeassistant/components/forked_daapd/config_flow.py
+++ b/homeassistant/components/forked_daapd/config_flow.py
@@ -104,7 +104,7 @@ class ForkedDaapdFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize."""
         self.discovery_schema = None
 
diff --git a/homeassistant/components/freebox/config_flow.py b/homeassistant/components/freebox/config_flow.py
index f0a7801823e..fd9252aaa17 100644
--- a/homeassistant/components/freebox/config_flow.py
+++ b/homeassistant/components/freebox/config_flow.py
@@ -20,7 +20,7 @@ class FreeboxFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize Freebox config flow."""
         self._host = None
         self._port = None
diff --git a/homeassistant/components/hunterdouglas_powerview/shade_data.py b/homeassistant/components/hunterdouglas_powerview/shade_data.py
index b66024aec7f..fab14b540b7 100644
--- a/homeassistant/components/hunterdouglas_powerview/shade_data.py
+++ b/homeassistant/components/hunterdouglas_powerview/shade_data.py
@@ -50,7 +50,7 @@ class PowerviewShadePositions:
 class PowerviewShadeData:
     """Coordinate shade data between multiple api calls."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Init the shade data."""
         self._group_data_by_id: dict[int, dict[str | int, Any]] = {}
         self.positions: dict[int, PowerviewShadePositions] = {}
diff --git a/homeassistant/components/intellifire/config_flow.py b/homeassistant/components/intellifire/config_flow.py
index 91676724a8b..6a061b40bcc 100644
--- a/homeassistant/components/intellifire/config_flow.py
+++ b/homeassistant/components/intellifire/config_flow.py
@@ -51,7 +51,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the Config Flow Handler."""
         self._host: str = ""
         self._serial: str = ""
diff --git a/homeassistant/components/ios/notify.py b/homeassistant/components/ios/notify.py
index e9926c48181..519bb87d98a 100644
--- a/homeassistant/components/ios/notify.py
+++ b/homeassistant/components/ios/notify.py
@@ -66,7 +66,7 @@ def get_service(
 class iOSNotificationService(BaseNotificationService):
     """Implement the notification service for iOS."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the service."""
 
     @property
diff --git a/homeassistant/components/kodi/config_flow.py b/homeassistant/components/kodi/config_flow.py
index ea1cf91b4c8..bd6d23e0f8e 100644
--- a/homeassistant/components/kodi/config_flow.py
+++ b/homeassistant/components/kodi/config_flow.py
@@ -89,7 +89,7 @@ class KodiConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self._host: str | None = None
         self._port: int | None = DEFAULT_PORT
diff --git a/homeassistant/components/konnected/__init__.py b/homeassistant/components/konnected/__init__.py
index f82bb17db62..bd629d53fc6 100644
--- a/homeassistant/components/konnected/__init__.py
+++ b/homeassistant/components/konnected/__init__.py
@@ -293,7 +293,7 @@ class KonnectedView(HomeAssistantView):
     name = "api:konnected"
     requires_auth = False  # Uses access token from configuration
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the view."""
 
     @staticmethod
diff --git a/homeassistant/components/logi_circle/config_flow.py b/homeassistant/components/logi_circle/config_flow.py
index 7453fe27e18..ff7528ac9f6 100644
--- a/homeassistant/components/logi_circle/config_flow.py
+++ b/homeassistant/components/logi_circle/config_flow.py
@@ -59,7 +59,7 @@ class LogiCircleFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self.flow_impl = None
 
diff --git a/homeassistant/components/london_air/sensor.py b/homeassistant/components/london_air/sensor.py
index 6538c06d0ba..e970f040b5f 100644
--- a/homeassistant/components/london_air/sensor.py
+++ b/homeassistant/components/london_air/sensor.py
@@ -81,7 +81,7 @@ def setup_platform(
 class APIData:
     """Get the latest data for all authorities."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the AirData object."""
         self.data = None
 
diff --git a/homeassistant/components/myq/config_flow.py b/homeassistant/components/myq/config_flow.py
index c26b54d7332..930d0014d1f 100644
--- a/homeassistant/components/myq/config_flow.py
+++ b/homeassistant/components/myq/config_flow.py
@@ -26,7 +26,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Start a myq config flow."""
         self._reauth_unique_id = None
 
diff --git a/homeassistant/components/netgear/config_flow.py b/homeassistant/components/netgear/config_flow.py
index 9024d0510dd..9516314431a 100644
--- a/homeassistant/components/netgear/config_flow.py
+++ b/homeassistant/components/netgear/config_flow.py
@@ -86,7 +86,7 @@ class NetgearFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the netgear config flow."""
         self.placeholders = {
             CONF_HOST: DEFAULT_HOST,
diff --git a/homeassistant/components/ovo_energy/config_flow.py b/homeassistant/components/ovo_energy/config_flow.py
index 227182e5f99..69fab07829f 100644
--- a/homeassistant/components/ovo_energy/config_flow.py
+++ b/homeassistant/components/ovo_energy/config_flow.py
@@ -29,7 +29,7 @@ class OVOEnergyFlowHandler(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the flow."""
         self.username = None
         self.account = None
diff --git a/homeassistant/components/panasonic_viera/config_flow.py b/homeassistant/components/panasonic_viera/config_flow.py
index d1c6461de21..38b6a351f29 100644
--- a/homeassistant/components/panasonic_viera/config_flow.py
+++ b/homeassistant/components/panasonic_viera/config_flow.py
@@ -30,7 +30,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the Panasonic Viera config flow."""
         self._data = {
             CONF_HOST: None,
diff --git a/homeassistant/components/point/config_flow.py b/homeassistant/components/point/config_flow.py
index 994047a2758..fad5b746252 100644
--- a/homeassistant/components/point/config_flow.py
+++ b/homeassistant/components/point/config_flow.py
@@ -46,7 +46,7 @@ class PointFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self.flow_impl = None
 
diff --git a/homeassistant/components/poolsense/config_flow.py b/homeassistant/components/poolsense/config_flow.py
index 7ab9691d134..6a6708b4045 100644
--- a/homeassistant/components/poolsense/config_flow.py
+++ b/homeassistant/components/poolsense/config_flow.py
@@ -18,7 +18,7 @@ class PoolSenseConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize PoolSense config flow."""
 
     async def async_step_user(self, user_input=None):
diff --git a/homeassistant/components/progettihwsw/config_flow.py b/homeassistant/components/progettihwsw/config_flow.py
index 5b996fd5eb4..9b4fc16c8c4 100644
--- a/homeassistant/components/progettihwsw/config_flow.py
+++ b/homeassistant/components/progettihwsw/config_flow.py
@@ -34,7 +34,7 @@ class ProgettiHWSWConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize class variables."""
         self.s1_in = None
 
diff --git a/homeassistant/components/radiotherm/config_flow.py b/homeassistant/components/radiotherm/config_flow.py
index 97ae2c1be0a..a3acc2e4389 100644
--- a/homeassistant/components/radiotherm/config_flow.py
+++ b/homeassistant/components/radiotherm/config_flow.py
@@ -39,7 +39,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize ConfigFlow."""
         self.discovered_ip: str | None = None
         self.discovered_init_data: RadioThermInitData | None = None
diff --git a/homeassistant/components/sia/config_flow.py b/homeassistant/components/sia/config_flow.py
index 516018c43a7..cbcb60a4565 100644
--- a/homeassistant/components/sia/config_flow.py
+++ b/homeassistant/components/sia/config_flow.py
@@ -100,7 +100,7 @@ class SIAConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         """Get the options flow for this handler."""
         return SIAOptionsFlowHandler(config_entry)
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the config flow."""
         self._data: dict[str, Any] = {}
         self._options: Mapping[str, Any] = {CONF_ACCOUNTS: {}}
diff --git a/homeassistant/components/smartthings/config_flow.py b/homeassistant/components/smartthings/config_flow.py
index 336eb99f6ee..0328c3a7f8e 100644
--- a/homeassistant/components/smartthings/config_flow.py
+++ b/homeassistant/components/smartthings/config_flow.py
@@ -40,7 +40,7 @@ class SmartThingsFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 2
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Create a new instance of the flow handler."""
         self.access_token = None
         self.app_id = None
diff --git a/homeassistant/components/soma/config_flow.py b/homeassistant/components/soma/config_flow.py
index a29b1b9bf9b..ca6f1fabf30 100644
--- a/homeassistant/components/soma/config_flow.py
+++ b/homeassistant/components/soma/config_flow.py
@@ -20,7 +20,7 @@ class SomaFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Instantiate config flow."""
 
     async def async_step_user(self, user_input=None):
diff --git a/homeassistant/components/songpal/config_flow.py b/homeassistant/components/songpal/config_flow.py
index 10737127e0b..a1e7938f3f8 100644
--- a/homeassistant/components/songpal/config_flow.py
+++ b/homeassistant/components/songpal/config_flow.py
@@ -32,7 +32,7 @@ class SongpalConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the flow."""
         self.conf: SongpalConfig | None = None
 
diff --git a/homeassistant/components/spider/config_flow.py b/homeassistant/components/spider/config_flow.py
index 7b31acb453d..eaf30bc541f 100644
--- a/homeassistant/components/spider/config_flow.py
+++ b/homeassistant/components/spider/config_flow.py
@@ -25,7 +25,7 @@ class SpiderConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the Spider flow."""
         self.data = {
             CONF_USERNAME: "",
diff --git a/homeassistant/components/squeezebox/config_flow.py b/homeassistant/components/squeezebox/config_flow.py
index 7a5d874c5bb..1411b8bc782 100644
--- a/homeassistant/components/squeezebox/config_flow.py
+++ b/homeassistant/components/squeezebox/config_flow.py
@@ -60,7 +60,7 @@ class SqueezeboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize an instance of the squeezebox config flow."""
         self.data_schema = _base_schema()
         self.discovery_info = None
diff --git a/homeassistant/components/starline/config_flow.py b/homeassistant/components/starline/config_flow.py
index 8a5aa494a5f..a00e24ca2a6 100644
--- a/homeassistant/components/starline/config_flow.py
+++ b/homeassistant/components/starline/config_flow.py
@@ -29,7 +29,7 @@ class StarlineFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self._app_id: str | None = None
         self._app_secret: str | None = None
diff --git a/homeassistant/components/switchbot/config_flow.py b/homeassistant/components/switchbot/config_flow.py
index 933d8ac3c56..1374e93326c 100644
--- a/homeassistant/components/switchbot/config_flow.py
+++ b/homeassistant/components/switchbot/config_flow.py
@@ -71,7 +71,7 @@ class SwitchbotConfigFlow(ConfigFlow, domain=DOMAIN):
         """Get the options flow for this handler."""
         return SwitchbotOptionsFlowHandler(config_entry)
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the config flow."""
         self._discovered_adv: SwitchBotAdvertisement | None = None
         self._discovered_advs: dict[str, SwitchBotAdvertisement] = {}
diff --git a/homeassistant/components/system_bridge/config_flow.py b/homeassistant/components/system_bridge/config_flow.py
index 995df6391cc..46914c0ea15 100644
--- a/homeassistant/components/system_bridge/config_flow.py
+++ b/homeassistant/components/system_bridge/config_flow.py
@@ -116,7 +116,7 @@ class ConfigFlow(
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self._name: str | None = None
         self._input: dict[str, Any] = {}
diff --git a/homeassistant/components/tellduslive/config_flow.py b/homeassistant/components/tellduslive/config_flow.py
index 18bbe59a25f..a181bce11f2 100644
--- a/homeassistant/components/tellduslive/config_flow.py
+++ b/homeassistant/components/tellduslive/config_flow.py
@@ -34,7 +34,7 @@ class FlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Init config flow."""
         self._hosts = [CLOUD_NAME]
         self._host = None
diff --git a/homeassistant/components/upb/config_flow.py b/homeassistant/components/upb/config_flow.py
index c920fa405ef..4a3d970a068 100644
--- a/homeassistant/components/upb/config_flow.py
+++ b/homeassistant/components/upb/config_flow.py
@@ -75,7 +75,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the UPB config flow."""
         self.importing = False
 
diff --git a/homeassistant/components/vesync/config_flow.py b/homeassistant/components/vesync/config_flow.py
index d9cd1bfc648..3f469d5eb81 100644
--- a/homeassistant/components/vesync/config_flow.py
+++ b/homeassistant/components/vesync/config_flow.py
@@ -16,7 +16,7 @@ class VeSyncFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Instantiate config flow."""
         self._username = None
         self._password = None
diff --git a/homeassistant/components/volumio/config_flow.py b/homeassistant/components/volumio/config_flow.py
index f9703e3c2fb..f2b5c7e796c 100644
--- a/homeassistant/components/volumio/config_flow.py
+++ b/homeassistant/components/volumio/config_flow.py
@@ -38,7 +38,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
         self._host: str | None = None
         self._port: int | None = None
diff --git a/homeassistant/components/vulcan/config_flow.py b/homeassistant/components/vulcan/config_flow.py
index 6c873194124..4547e6dd31e 100644
--- a/homeassistant/components/vulcan/config_flow.py
+++ b/homeassistant/components/vulcan/config_flow.py
@@ -38,7 +38,7 @@ class VulcanFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize config flow."""
         self.account = None
         self.keystore = None
diff --git a/homeassistant/components/wolflink/config_flow.py b/homeassistant/components/wolflink/config_flow.py
index 491b7a1232d..63331fdbbd1 100644
--- a/homeassistant/components/wolflink/config_flow.py
+++ b/homeassistant/components/wolflink/config_flow.py
@@ -23,7 +23,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize with empty username and password."""
         self.username = None
         self.password = None
diff --git a/homeassistant/components/zha/core/registries.py b/homeassistant/components/zha/core/registries.py
index 206b634b0a6..6b99d412688 100644
--- a/homeassistant/components/zha/core/registries.py
+++ b/homeassistant/components/zha/core/registries.py
@@ -235,7 +235,7 @@ class EntityClassAndChannels:
 class ZHAEntityRegistry:
     """Channel to ZHA Entity mapping."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize Registry instance."""
         self._strict_registry: dict[
             str, dict[MatchRule, type[ZhaEntity]]