Run test suit -> test fail -> abort the remaining tests

Hi,

I am looking for a good practice on how to design a test suit that stop
the execution if a certain test or smoke test fails. My tests are placed
in different test files and I am using:
Ruby
Rspec
Selenium
Quick Build (to schedule and run my tests)

If someone want to share or have thoughts of how I could deal with this?

Thanks in advance!
Mattias