diff --git a/src/cloudevents/core/v1/event.py b/src/cloudevents/core/v1/event.py
index b56ef41..043670b 100644
--- a/src/cloudevents/core/v1/event.py
+++ b/src/cloudevents/core/v1/event.py
@@ -70,7 +70,7 @@ def _validate_attribute(attributes: dict[str, Any]) -> None:
         errors.update(CloudEvent._validate_optional_attributes(attributes=attributes))
         errors.update(CloudEvent._validate_extension_attributes(attributes=attributes))
         if errors:
-            raise CloudEventValidationError(dict(errors))
+            raise CloudEventValidationError(errors=errors)
 
     @staticmethod
     def _validate_required_attributes(