There is a regularly randomly failing integration test:
1) Piwik\Plugins\SEO\tests\Integration\SEOTest::test_API google-index expected non-zero rank, got  Failed asserting that a integer is not empty. /home/travis/build/matomo-org/matomo/plugins/SEO/tests/Integration/SEOTest.php:61
seen for example in https://travis-ci.org/matomo-org/matomo/jobs/550650396
is there maybe a way to avoid this random failure? (maybe it would help to re-try after 10 seconds when it fails, but probably won't be enough to fix the issue)
Investigating this was already on my todo, but I wouldn't be surprised if this is just the fact that the Google SEO integration is basically broken: https://github.com/matomo-org/matomo/issues/12248
I guess the best "solution" would just be ignoring that test and making it not fail the whole build.