python threading.thread() 里while真时会一直循环，怎么解决？

import threading
from time import sleep
run = True
def test():
    while run:
        print("1")
        sleep(1)
thread = threading.Thread(target=test())
thread.start()
while True:
    print("2")
    sleep(1)

会一直输出1，但是我想1，2都输出，需要怎么解决？谢谢

改成 thread = threading.Thread(target=test)