npm test error Executed 0 of 0 ERROR

Hello
npm install was ok but when i try to run test I have this error

npm test

> ngx-admin@2.0.1 test C:\xampp\htdocs\projects\ngx-admin
> ng test -sr

10% building modules 1/1 modules 0 active23 12 2017 08:52:24.808:INFO [karma]: Karma v2.0.0 server started at http://0.0.0.0:9876/
23 12 2017 08:52:24.808:INFO [launcher]: Launching browser Chrome with unlimited concurrency
23 12 2017 08:52:24.808:INFO [launcher]: Starting browser Chrome 23 12 2017 08:53:12.849:INFO [Chrome 63.0.3239 (Windows 10 0.0.0)]: Connected on socket aeCXCZrY5yvK0iZrAAAA with id 20468650
Chrome 63.0.3239 (Windows 10 0.0.0): Executed 0 of 0 ERROR (0.02 secs / 0 secs)
npm ERR! Test failed. See above for more details.

any idea?
Thank you