is, err := (&test.StubDriver{}).InstanceSet(nil, "test-instance-set-id", nil, logger)
c.Assert(err, check.IsNil)
inst, err := is.Create(arvados.InstanceType{}, "", nil, "echo InitCommand", nil)
is, err := (&test.StubDriver{}).InstanceSet(nil, "test-instance-set-id", nil, logger)
c.Assert(err, check.IsNil)
inst, err := is.Create(arvados.InstanceType{}, "", nil, "echo InitCommand", nil)