fix L0 unit test #19

Job	Run time
run_tests / checkout_and_config	3s
run_tests / unit_tests (a100) / detect_changes	5s
run_tests / unit_tests (a100) / unit-a100-pytorch_lint	20m 59s
run_tests / unit_tests (a100) / unit-a100-pytorch_wheel	20m 59s
run_tests / unit_tests (a100) / unit-a100-pytorch_unittest	1s
run_tests / unit_tests (a100) / unit-a100-distributed	20m 59s
run_tests / unit_tests (a100) / unit-a100-pytorch_debug	1s
run_tests / unit_tests (a100) / unit-a100-core	1s
run_tests / all_tests_complete	2s
all_tests	3s
	1h 3m 13s

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