Profiles config error

Hello,

when i add this config:

default:
    extensions:
        shvetsgroup\ParallelRunner\Extension:
            profiles:
                - p1
                - p2

i got the error message:

[Symfony\Component\Config\Definition\Exception\InvalidTypeException]
Invalid type for path "testwork.ParallelRunner.profiles". Expected scalar, but got array.

What i am doing wrong? I use Behat 3.4.3.

[jbatista-ciandt]

Try this:

default:
    extensions:
        shvetsgroup\ParallelRunner\Extension:
            profiles:
                p1
                p2