./python -m test -R 3:3 test_builtin
Using random seed: 4149387192
0:00:00 load avg: 20.36 Run 1 test sequentially in a single process
0:00:00 load avg: 20.36 [1/1] test_builtin
beginning 6 repetitions. Showing number of leaks (. for 0 or less, X for 10 or more)
123:456
XXX XXX
test_builtin leaked [10, 10, 10] references, sum=30
test_builtin leaked [8, 8, 8] memory blocks, sum=24
test_builtin failed (reference leak)

== Tests result: FAILURE ==

1 test failed:
    test_builtin

Total duration: 2.4 sec
Total tests: run=135 skipped=5
Total test files: run=1/1 failed=1
Result: FAILURE