From my experience, a wildcard by itself isn't correct, it should be ".*".
The star usually means "match the previous character 1 or more times".
By adding a dot you're saying "match any character 1 or more times".
You don't even need the wildcard for what you're trying to do.
Try testing your regex'es at regex101.com or any online regex site.
Matches:
Doesn't Match: