If you have a regular test that have a teardown block, and for any reason an exception get raised, ActiveSupport will not run subsequent after_teardown method provided by other module or gems.
One of them being the ActiveRecord::TestFixtures which won't rollback the transation when the test ends making all subsequent test to be in a weird state.
The default implementation of minitest is to run all teardown methods from the user's test, rescue all exceptions, run all after_teardown methods provided by libraries and finally re-raise the exception that happened in the user's teardown method.
Rails should do the same.
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