Serialize tapingo_url

Closes #36
3 jobs for 36-tapingo-links in 1 minute and 8 seconds
Status Job ID Name Coverage
  Test
passed #3004
whats-open-py2.7

00:01:06

passed #3005
whats-open-py3.5

00:01:08

passed #3006
whats-open-py3.6

00:01:07