When launching meteor test --driver-package practicalmeteor:mocha --port=$IP:$PORT on c9.io workspace I get the following error
[[[[[ Tests ]]]]]
=> Started proxy.
Unexpected mongo exit code 48. Restarting.
Unexpected mongo exit code 48. Restarting.
Unexpected mongo exit code 48. Restarting.
Can't start Mongo server.
MongoDB exited because its port was closed, or was already
taken by a previous instance of MongoDB
Check for other processes listening on port 1
or other Meteor instances running in the same project.
It would be nice to be able to specify the interface like with the meteor run --port=$IP:$PORT command.