diff --git a/.strict-typing b/.strict-typing
index 14e4ff002be..598f2bc1f6d 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -265,6 +265,7 @@ homeassistant.components.sleepiq.*
 homeassistant.components.smhi.*
 homeassistant.components.snooz.*
 homeassistant.components.sonarr.*
+homeassistant.components.speedtestdotnet.*
 homeassistant.components.ssdp.*
 homeassistant.components.statistics.*
 homeassistant.components.steamist.*
diff --git a/homeassistant/components/speedtestdotnet/coordinator.py b/homeassistant/components/speedtestdotnet/coordinator.py
index 576fcd33d52..e07bb94342d 100644
--- a/homeassistant/components/speedtestdotnet/coordinator.py
+++ b/homeassistant/components/speedtestdotnet/coordinator.py
@@ -2,7 +2,7 @@
 
 from datetime import timedelta
 import logging
-from typing import Any
+from typing import Any, cast
 
 import speedtest
 
@@ -69,7 +69,7 @@ class SpeedTestDataCoordinator(DataUpdateCoordinator[dict[str, Any]]):
         )
         self.api.download()
         self.api.upload()
-        return self.api.results.dict()
+        return cast(dict[str, Any], self.api.results.dict())
 
     async def _async_update_data(self) -> dict[str, Any]:
         """Update Speedtest data."""
diff --git a/mypy.ini b/mypy.ini
index 4f3a7c87101..2e0c5d2ae0d 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -2404,6 +2404,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.speedtestdotnet.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.ssdp.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true