Fix the unittest issue.

4 jobs for update_meta_yaml in 36 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed linting #3316
passoft

00:00:31

passed python3.6 #3317
passoft

00:00:35

passed python3.7 #3318
passoft

00:00:33

passed python3.8 #3319
passoft

00:00:28