Use media str method for admin

4 jobs for master in 3 minutes and 25 seconds (queued for 3 minutes and 20 seconds)
Status Job ID Name Coverage
  Test
passed #2468
linters

00:00:51

passed #2465
python35

00:00:51

passed #2466
python36

00:00:51

passed #2467
python37

00:00:50