Trait没有被报道为“被覆盖”

I have a problem testing traits. One of my classes uses a trait and implements an interface. Interface methods by the way are being implemented by a trait.

When I run phpunit with coverage report enabled I see that my class is shown as 100% covered, interface is shown as 100% covered, by trait is shown as 0%:

The class uses trait, methods from trait are being called in test suite, but still trait is considered uncovered.

Should traits be tested separately somehow? I know about getMockForTrait() method, but I would like to avoid it. Is there any way to fix the issue and to cover trait by testing the class itself?