patch 8.0.1667: terminal window tests are flaky commit https://github.com/vim/vim/commit/3680bab7e797444a7f41646888d9dd04b01c3816 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Apr 6 20:22:06 2018 +0200 patch 8.0.1667: terminal window tests are flaky Problem: Terminal window tests are flaky. Solution: Increase the waiting time for Vim to start.

#!/usr/bin/python
#
# Program that writes a number to stdout repeatedly
#
# This requires Python 2.6 or later.

from __future__ import print_function
import sys
import time

if __name__ == "__main__":

    done = 0
    while done < 10:
        done = done + 1
        print(done)
        sys.stdout.flush()
        time.sleep(0.05)  # sleep 50 msec