I have used those hand vacuum pumps, that have a little bottle that has hose you connect to the bleeder screw and then create suction and open the bleeder and pull the fluid into the bottle, til there is no air coming out, then close the bleeder . . . usually can get at harbor freight cheap enough . . .

https://ae01.alicdn.com/kf/HTB18iXQKpXXX...-Tester-Kit.jpg