The only way I’ve found to test a Sequence is to clone it so it doesn’t skew the Open/Click rates, then go to my Hubspot record and add myself. I start with email 1, enroll & send, then unenroll myself and add myself again, but starting with email #2. Wash, rinse, repeat until all 5 emails are in my inbox for review/editing. It sounds worse than it is, but it goes quickly and at least I know my emails look okay. They really do need to add a test feature like Marketing Hub has.