diff --git a/homeassistant/components/vesync/binary_sensor.py b/homeassistant/components/vesync/binary_sensor.py
index 87e7b90da56d..b908b149953c 100644
--- a/homeassistant/components/vesync/binary_sensor.py
+++ b/homeassistant/components/vesync/binary_sensor.py
@@ -64,7 +64,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -78,7 +78,11 @@ async def async_setup_entry(
 
 
 @callback
-def _setup_entities(devices, async_add_entities, coordinator):
+def _setup_entities(
+    devices: list[VeSyncBaseDevice],
+    async_add_entities: AddConfigEntryEntitiesCallback,
+    coordinator: VeSyncDataCoordinator,
+) -> None:
     """Add entity."""
     async_add_entities(
         (
diff --git a/homeassistant/components/vesync/fan.py b/homeassistant/components/vesync/fan.py
index 3d0dd4a2adc2..f74f99effec2 100644
--- a/homeassistant/components/vesync/fan.py
+++ b/homeassistant/components/vesync/fan.py
@@ -50,7 +50,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -66,9 +66,9 @@ async def async_setup_entry(
 @callback
 def _setup_entities(
     devices: list[VeSyncBaseDevice],
-    async_add_entities,
+    async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Check if device is fan and add entity."""
 
     async_add_entities(
diff --git a/homeassistant/components/vesync/humidifier.py b/homeassistant/components/vesync/humidifier.py
index 5d70b5d8f9a9..2dc9db3d91e8 100644
--- a/homeassistant/components/vesync/humidifier.py
+++ b/homeassistant/components/vesync/humidifier.py
@@ -53,7 +53,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -73,7 +73,7 @@ def _setup_entities(
     devices: list[VeSyncBaseDevice],
     async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Add humidifier entities."""
     async_add_entities(VeSyncHumidifierHA(dev, coordinator) for dev in devices)
 
diff --git a/homeassistant/components/vesync/light.py b/homeassistant/components/vesync/light.py
index 1e5ce3027cf4..90090344e7bc 100644
--- a/homeassistant/components/vesync/light.py
+++ b/homeassistant/components/vesync/light.py
@@ -38,7 +38,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -54,9 +54,9 @@ async def async_setup_entry(
 @callback
 def _setup_entities(
     devices: list[VeSyncBaseDevice],
-    async_add_entities,
+    async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Check if device is a light and add entity."""
     entities: list[VeSyncBaseLightHA] = []
     for dev in devices:
diff --git a/homeassistant/components/vesync/number.py b/homeassistant/components/vesync/number.py
index c5716843a457..aba4f9eb48d2 100644
--- a/homeassistant/components/vesync/number.py
+++ b/homeassistant/components/vesync/number.py
@@ -61,7 +61,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -79,7 +79,7 @@ def _setup_entities(
     devices: list[VeSyncBaseDevice],
     async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Add number entities."""
 
     async_add_entities(
diff --git a/homeassistant/components/vesync/select.py b/homeassistant/components/vesync/select.py
index e34d13babf0e..b9a6d0a84acc 100644
--- a/homeassistant/components/vesync/select.py
+++ b/homeassistant/components/vesync/select.py
@@ -115,7 +115,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -133,7 +133,7 @@ def _setup_entities(
     devices: list[VeSyncBaseDevice],
     async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Add select entities."""
 
     async_add_entities(
diff --git a/homeassistant/components/vesync/sensor.py b/homeassistant/components/vesync/sensor.py
index 3d459795a041..495a6b91c59a 100644
--- a/homeassistant/components/vesync/sensor.py
+++ b/homeassistant/components/vesync/sensor.py
@@ -162,7 +162,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -180,7 +180,7 @@ def _setup_entities(
     devices: list[VeSyncBaseDevice],
     async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Check if device is online and add entity."""
 
     async_add_entities(
diff --git a/homeassistant/components/vesync/switch.py b/homeassistant/components/vesync/switch.py
index d29654a6590d..14fe571d643a 100644
--- a/homeassistant/components/vesync/switch.py
+++ b/homeassistant/components/vesync/switch.py
@@ -77,7 +77,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)
 
@@ -93,9 +93,9 @@ async def async_setup_entry(
 @callback
 def _setup_entities(
     devices: list[VeSyncBaseDevice],
-    async_add_entities,
+    async_add_entities: AddConfigEntryEntitiesCallback,
     coordinator: VeSyncDataCoordinator,
-):
+) -> None:
     """Check if device is online and add entity."""
     async_add_entities(
         VeSyncSwitchEntity(dev, description, coordinator)
diff --git a/homeassistant/components/vesync/update.py b/homeassistant/components/vesync/update.py
index 433da715d5fd..d405ac4532b9 100644
--- a/homeassistant/components/vesync/update.py
+++ b/homeassistant/components/vesync/update.py
@@ -22,7 +22,7 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN][VS_COORDINATOR]
 
     @callback
-    def discover(devices):
+    def discover(devices: list[VeSyncBaseDevice]) -> None:
         """Add new devices to platform."""
         _setup_entities(devices, async_add_entities, coordinator)