PHPUnit - How to fail on risky test

I want PHPUnit to fail if one or more test is considered as risky. Actually:

PHPUnit 5.3.4 by Sebastian Bergmann and contributors.

..RRR..                                                         7 / 7 (100%)

Time: 2.83 seconds, Memory: 26.00Mb

OK, but incomplete, skipped, or risky tests!
Tests: 7, Assertions: 137, Risky: 3.

It says "OK, but incomplete", so my tests did not fail (and can be shipped in case of continous delivery). Is there any way to have a "fail" status? I want my test global status considered as failed on risky test, don't know if it's possible.