Following hang on FreeBSD:

invalid/invalid-escape
invalid/object-unterminated-value
invalid/tab-character-in-string
invalid/unterminated-empty-key
invalid/unterminated-key
invalid/unterminated-string
invalid-unicode/lone-utf-8-continuation-byte
invalid-unicode/overlong-ascii-encoding
invalid-unicode/restricted-utf-8
invalid-unicode/utf-8-after-backslash

did not have time to investigate, filing it here as a reminder.