Problem/Motivation
E.g. https://www.drupal.org/pift-ci-job/620182
Failing tests:
User.Drupal\user\Tests\UserTimeZoneTest
✗ testUserTimeZone
fail: [Other] Line 67 of core/modules/user/src/Tests/UserTimeZoneTest.php:
Date should be Chile summer time; five hours ahead of PST.fail: [Other] Line 69 of core/modules/user/src/Tests/UserTimeZoneTest.php:
Date should be Chile time; four hours ahead of PSTfail: [Other] Line 71 of core/modules/user/src/Tests/UserTimeZoneTest.php:
Date should be Chile time; three hours ahead of PDT.
@mpdonadio mentioned that there was a recent change to Chile's timezone rules. This may be an actual bug in HEAD as the assertion in question is for a date in 2007, and Chile's timezone rules have actually changed a few times since then.
Proposed resolution
Fix HEAD or the test, depending.
Remaining tasks
TBD