[#serial] not respected with tokio::test?

Is it possible that [#serial] is not respected when using Tokio? I have a test definition as below (many in fact, which should be run one at-a-time). Each test is resource intensive and should be run in serial. But, all tests are run simultaneously - machine runs out of memory and kills the process. When running each test individually via command-line, everything stays in limits and all tests pass. OS: ubuntu 20.04 ``` #[tokio::test(flavor = "multi_thread")] #[serial(slt)] async fn some_test_of_mine() -> CliResult<()> { ... } #[tokio::test(flavor = "multi_thread")] #[serial(slt)] async fn another_test_of_mine() -> CliResult<()> { ... } ... ```