Sls create test is not producing any outout

Kicking off some much overdue TDD with Serverless.

I’ve installed serverless-mocha-plugin as per

When I try to sls create test -f I dont get any output

I have tried a few different params to but no results. No test is created. I’ve tried SLS_DEBUG=true and nothing of interest is shown there either

The output of sls command shows the invoke test and create test functionality is available.

Anyone got any ideas on where start debugging this?