Tests failing with npm@3.3.12

[claudiopro]

Weird issues with npm@3.3.12:

$ npm test

> gluttony@1.0.3 pretest /Users/delphine/Development/Git/claudiopro/gluttony
> npm install


> gluttony@1.0.3 test /Users/delphine/Development/Git/claudiopro/gluttony
> tap test/*.js

test/test.js .....Removing existing dependencies...
.......Yay! Dependencies reinstalled from scratch.
test/test.js ........................................ 13/15 30s
  package_no_node_modules
  not ok missing plan
    results:
      ok: false
      count: 2
      pass: 2

  not ok missing plan
    results:
      ok: false
      count: 2
      pass: 2

total ............................................... 13/15


  13 passing (30s)
  2 failing

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

[claudiopro]

As a comparison, results of tests with npm@2.14:

$ npm test

> gluttony@1.0.3 pretest /Users/delphine/Development/Git/claudiopro/gluttony
> npm install

npm WARN prefer global npm@2.14.10 should be installed with -g

> gluttony@1.0.3 test /Users/delphine/Development/Git/claudiopro/gluttony
> tap test/*.js

test/test.js .....Removing existing dependencies...
.......Yay! Dependencies reinstalled from scratch.
.......Yay! Dependencies reinstalled from scratch.
......Yay! Dependencies reinstalled from scratch.
test/test.js ........................................ 25/25 22s
total ............................................... 25/25

  25 passing (22s)

  ok