Option to customize tls cipher list

In my testcase, the server only handles certain tls cipher options from the standard suite to decrepit the CA, so in the regular app start command, I use the `node --tls-cipher-list='ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384...' .` to configure the ciphers candidate. But I'm having trouble to find equivalent setting in mocha or supertest, but since I'm looking for the programmatic solution, I feel more comfortable to ask here.