Investigate failures of TestImporter_PreImport_BadManifestFormat test on `master`

Test was identified as failing 100% of time here.

We realized that this test has been failing constantly, but the encapsulating CI job still succeeds, making it go unnoticed.

Task

  • Fix TestImporter_PreImport_BadManifestFormat test
  • Find out why the job is still marked as successfull
  • Ensure that no other test failures went unnoticed due to similar reasons
Edited by Pawel Rozlach