./python.exe -m test -R 3:3 test_coroutines
Using random seed: 2850221778
0:00:00 load avg: 2.19 Run 1 test sequentially in a single process
0:00:00 load avg: 2.19 [1/1] test_coroutines
beginning 6 repetitions. Showing number of leaks (. for 0 or less, X for 10 or more)
123:456
XXX XXX
test_coroutines leaked [10, 10, 10] references, sum=30
test_coroutines leaked [10, 10, 10] memory blocks, sum=30
test_coroutines failed (reference leak)

== Tests result: FAILURE ==

1 test failed:
    test_coroutines

Total duration: 2.6 sec
Total tests: run=97
Total test files: run=1/1 failed=1
Result: FAILURE