diff --git a/homeassistant/components/amazon_devices/binary_sensor.py b/homeassistant/components/amazon_devices/binary_sensor.py
index 2e41983dda4..ab1fadc7548 100644
--- a/homeassistant/components/amazon_devices/binary_sensor.py
+++ b/homeassistant/components/amazon_devices/binary_sensor.py
@@ -13,6 +13,7 @@ from homeassistant.components.binary_sensor import (
     BinarySensorEntity,
     BinarySensorEntityDescription,
 )
+from homeassistant.const import EntityCategory
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 
@@ -34,10 +35,12 @@ BINARY_SENSORS: Final = (
     AmazonBinarySensorEntityDescription(
         key="online",
         device_class=BinarySensorDeviceClass.CONNECTIVITY,
+        entity_category=EntityCategory.DIAGNOSTIC,
         is_on_fn=lambda _device: _device.online,
     ),
     AmazonBinarySensorEntityDescription(
         key="bluetooth",
+        entity_category=EntityCategory.DIAGNOSTIC,
         translation_key="bluetooth",
         is_on_fn=lambda _device: _device.bluetooth_state,
     ),
diff --git a/tests/components/amazon_devices/snapshots/test_binary_sensor.ambr b/tests/components/amazon_devices/snapshots/test_binary_sensor.ambr
index 0d3a5252a73..e914541d19c 100644
--- a/tests/components/amazon_devices/snapshots/test_binary_sensor.ambr
+++ b/tests/components/amazon_devices/snapshots/test_binary_sensor.ambr
@@ -11,7 +11,7 @@
     'device_id': <ANY>,
     'disabled_by': None,
     'domain': 'binary_sensor',
-    'entity_category': None,
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
     'entity_id': 'binary_sensor.echo_test_bluetooth',
     'has_entity_name': True,
     'hidden_by': None,
@@ -59,7 +59,7 @@
     'device_id': <ANY>,
     'disabled_by': None,
     'domain': 'binary_sensor',
-    'entity_category': None,
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
     'entity_id': 'binary_sensor.echo_test_connectivity',
     'has_entity_name': True,
     'hidden_by': None,