Hello Sebastian, could you please file a ticket with Apache Infra to enable Travis CI for our main repository? The discussion thread is available at https://lists.apache.org/thread.html/3871eb5a7bc31eb467f68935f4a56469292b03a33f1693cdb9a98f31@%3Cdev.mxnet.apache.org%3E .
The settings should be branch- as well as PR-validation. The reported status should be set to "not required", thus not blocking any PRs if that validation pipeline fails. Best regards, Marco