diff --git a/tests/syrupy.py b/tests/syrupy.py
index 52bd5756798..9dc8e50e5f1 100644
--- a/tests/syrupy.py
+++ b/tests/syrupy.py
@@ -12,13 +12,7 @@ import attr
 import attrs
 from syrupy.extensions.amber import AmberDataSerializer, AmberSnapshotExtension
 from syrupy.location import PyTestLocation
-from syrupy.types import (
-    PropertyFilter,
-    PropertyMatcher,
-    PropertyPath,
-    SerializableData,
-    SerializedData,
-)
+from syrupy.types import PropertyFilter, PropertyMatcher, PropertyPath, SerializableData
 import voluptuous as vol
 import voluptuous_serialize
 
@@ -90,7 +84,7 @@ class HomeAssistantSnapshotSerializer(AmberDataSerializer):
         matcher: PropertyMatcher | None = None,
         path: PropertyPath = (),
         visited: set[Any] | None = None,
-    ) -> SerializedData:
+    ) -> str:
         """Pre-process data before serializing.
 
         This allows us to handle specific cases for Home Assistant data structures.
@@ -111,7 +105,7 @@ class HomeAssistantSnapshotSerializer(AmberDataSerializer):
             serializable_data = voluptuous_serialize.convert(data)
         elif isinstance(data, ConfigEntry):
             serializable_data = cls._serializable_config_entry(data)
-        elif dataclasses.is_dataclass(data):
+        elif dataclasses.is_dataclass(type(data)):
             serializable_data = dataclasses.asdict(data)
         elif isinstance(data, IntFlag):
             # The repr of an enum.IntFlag has changed between Python 3.10 and 3.11
@@ -120,7 +114,7 @@ class HomeAssistantSnapshotSerializer(AmberDataSerializer):
         else:
             serializable_data = data
             with suppress(TypeError):
-                if attr.has(data):
+                if attr.has(type(data)):
                     serializable_data = attrs.asdict(data)
 
         return super()._serialize(
@@ -136,7 +130,7 @@ class HomeAssistantSnapshotSerializer(AmberDataSerializer):
     @classmethod
     def _serializable_area_registry_entry(cls, data: ar.AreaEntry) -> SerializableData:
         """Prepare a Home Assistant area registry entry for serialization."""
-        serialized = AreaRegistryEntrySnapshot(attrs.asdict(data) | {"id": ANY})
+        serialized = AreaRegistryEntrySnapshot(dataclasses.asdict(data) | {"id": ANY})
         serialized.pop("_json_repr")
         return serialized