Patches are not being tested beacuse HEAD of dev branch doesn't pass tests at the moment

Could you please fix dev branch so it passes the tests to allow all patches to be tested?
All patches in this issue queue are 'postponed' in testbot because of that.

Why is my patch marked "postponed"?

Most of the time this is because the branch you're testing against hasn't passed tests. Follow the "branch" link on the qa.drupal.org page explaining that your patch is postponed and you'll see the status of branch testing. Usually some work is required on the branch (and tests won't succeed without new commits).
In other words, if the testing infrastructure doesn't have a clean (i.e. passed) test for the project HEAD, then it does not have a known good state to compare against ... it can't detect between a failure caused by a patch and the existing failures in the branch.