How strict are you regarding test coverage when you're building an MVP?

[MrMike]

What's your philosophy on test coverage while building out your MVP (aka prototype/alpha/v1 or whatever you prefer to call it)?

[arisAlexis]

I write integration tests so I know when something is seriously f* up but I don't try to have unit tests for everything. If the startup goes well someone will be dedicated to that in the future.