Test failed

[ghost]

Running npm test on the latest master and on 0.4.2 gives me the following errors:

MongoDB tests
    1) should create a temporary user (createTempUser())
    2) should put the temporary user into the persistent collection (confirmTempUser())
    3) "after all" hook


  13 passing (6s)
  3 failing

  1) MongoDB tests should create a temporary user (createTempUser()):
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
  

  2) MongoDB tests should put the temporary user into the persistent collection (confirmTempUser()):
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
  

  3) MongoDB tests "after all" hook:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
  



npm ERR! Test failed.  See above for more details.

I'm using MongoDB v3.4.7 which is up and running and there is no problem to connect using mongo command. What can cause an issue?