use gen_test in test_center
use gen_test in test_center

mrocklin/distributed,broxtronix/distributed,amosonn/distributed,dask/distributed,mrocklin/distributed,amosonn/distributed,dask/distributed,broxtronix/distributed,amosonn/distributed,dask/distributed,broxtronix/distributed,blaze/distributed,dask/distributed,blaze/distributed,mrocklin/distributed