Reopening since it was spotted again (https://ci.xwiki.org/job/XWiki/job/xwiki-platform/job/stable-18.4.x/68/testReport/org.xwiki.scheduler.test.ui/AllIT$NestedSchedulerIT/Platform_Builds___main___integration_tests___IT_for_xwiki_platform_core_xwiki_platform_scheduler_xwiki_platform_scheduler_test_xwiki_platform_scheduler_test_docker___Build_for_IT_for_xwiki_platform_core_xwiki_platform_scheduler_xwiki_platform_scheduler_test_xwiki_platform_scheduler_test_docker___verifyEscaping_TestUtils_/).
