diff --git a/homeassistant/components/command_line/notify.py b/homeassistant/components/command_line/notify.py
index c41e26c21bb..412456ff6e5 100644
--- a/homeassistant/components/command_line/notify.py
+++ b/homeassistant/components/command_line/notify.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 
 import logging
 import subprocess
+from typing import Any
 
 import voluptuous as vol
 
@@ -46,7 +47,7 @@ class CommandLineNotificationService(BaseNotificationService):
         self.command = command
         self._timeout = timeout
 
-    def send_message(self, message="", **kwargs) -> None:
+    def send_message(self, message: str = "", **kwargs: Any) -> None:
         """Send a message to a command line."""
         with subprocess.Popen(
             self.command,
diff --git a/homeassistant/components/file/notify.py b/homeassistant/components/file/notify.py
index 4a0b4c11ca6..3238fe91102 100644
--- a/homeassistant/components/file/notify.py
+++ b/homeassistant/components/file/notify.py
@@ -2,7 +2,7 @@
 from __future__ import annotations
 
 import os
-from typing import TextIO
+from typing import Any, TextIO
 
 import voluptuous as vol
 
@@ -48,7 +48,7 @@ class FileNotificationService(BaseNotificationService):
         self.filename = filename
         self.add_timestamp = add_timestamp
 
-    def send_message(self, message="", **kwargs) -> None:
+    def send_message(self, message: str = "", **kwargs: Any) -> None:
         """Send a message to a file."""
         file: TextIO
         if not self.hass.config.config_dir: