This is a testharness.js-based test. Found 2 FAIL, 0 TIMEOUT, 0 NOTRUN. [FAIL] Property view-transition-name value 'ident("myident" random(30, 10))' assert_true: 'ident("myident" random(30, 10))' is a supported value for view-transition-name. expected true got false [FAIL] Shared by property 'view-transition-name' with values 'ident("myident" random(1, 300000))', 'ident("myident" random(property-index-scoped, 1, 300000))' assert_false: ident("myident" random(1, 300000)) values on different elements should not be equal expected false got true Harness: the test ran to completion.