How to configure tests in Cargo.toml (test-threads=1)

Right now the way my tests are written they won't work well using threads so I'd like to make sure the tests always run in a single thread.

On the command line this works:

cargo test -- --test-threads=1

Is there a way to put the --test-threads=1 part in Cargo.toml (or some other configuration file) so I won't have to type the whole command and other who might clone the project won't run the tests by mistake with threads?

I like @vague's answer from a year ago concerning how you can set test-threads other than via the CLI:

This answer from the same topic is also neat:

(Really, you should probably read the whole topic as the discussion in it about whether you even should run your test harness single threaded or not is also quite nice)

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It's probably better to wrap the sensitive tests into a shared mutex so that those that aren't sensitive can still run in parallel. Otherwise you're slowing down the entire testsuite for just those that have an issue.

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