@TiMESPLiNTER You can check local test run script instructions here https://github.com/php-enqueue/enqueue-dev/blob/master/docs/contribution.md (kinda obscure, that's why I'm linking it in case you've missed it)

Looks good to me. I've double checked that SimpleClient does indeed automatically convert string messages into Message instance.

@makasim Looks simple enough to me. Could I merge PR's like this in the future in case you're occupied or you'd like to keep control over it?

@Steveb-p sure, I don't mind