Invalid namespace file passes kubeval

apiVersion: v1
kind: Namespace
metadata:
creationTimestamp: null
name: Test2
spec: {}
status: {}

Trying to validate a namespace YAML file that has an invalid name.
If I apply it with dry-run=server flag it throws error "The Namespace "Test2" is invalid: metadata.name: Invalid value: "Test2": a lowercase RFC 1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name', or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')" but kubeval doesn't detect this as an error.

Start by reproducing the reported kubeval validation with the Namespace YAML containing metadata.name "Test2", then compare it with the Kubernetes server dry-run result. Done means kubeval reports the uppercase namespace name as invalid rather than accepting the file.

Written by the indexing model from the issue text.