TST: check for py.test runner in test_parallel
TST: check for py.test runner in test_parallel

spacetelescope/asv,airspeed-velocity/asv,spacetelescope/asv,qwhelan/asv,airspeed-velocity/asv,spacetelescope/asv,qwhelan/asv,airspeed-velocity/asv,spacetelescope/asv,airspeed-velocity/asv,qwhelan/asv,qwhelan/asv