i added

default_concurrency: PARALLEL_CLASSES_AND_METHODS

and

use_experimental_runner: True

, but i’m seeing all tests run in the same thread, e.g.

[junit]
Using experimental junit-runner logic.
Auto-detected 4 processors, using -parallel-threads=4

                     Time: 0.002

                     OK (0 tests)


                     Time: 0

                     OK (0 tests)

                     ..........................................
                     Time: 0.636

                     OK (21 tests)


                     Time: 0

                     OK (0 tests)

is this expected?