I usually have a single integration test crate for my crate (to improve compile time by linking test executable only once).
However, I am always having trouble inventing name for this test crate. Just tests.rs conflicts with unit-tests, and tests/tests.rs looks silly. tests/main.rs looks perfect, but then the name is main, which is silly. And I don't have any other obvious options 
Can anyone suggest better alternatives?
tests/integration.rs?
Often I'll call mine smoke_test.rs because often I just want to make sure the happy path works and it doesn't let the smoke out.
That said, a lot of the things I do lend themselves more towards unit testing than integration testing, so I don't do too much in my tests/ folder.
I've gone with tests/it.rs for the time being.
tests/dress_rehearsal.rs
Ok, so, it’s unconventional, yes, but «everyone» probably knows it’s the last and only full scale test where all the individual pieces come together. Sort of an integration test for musicians and actors.