F                                                                        [100%]
=================================== FAILURES ===================================
_________________ test_prep_ablation_changes_only_one_control __________________

    def test_prep_ablation_changes_only_one_control():
        tree=ast.parse(Path(__file__).with_name('rust_arm.py').read_text())
        functions=[n for n in tree.body if isinstance(n,ast.FunctionDef) and n.name=='engine_controls']
>       assert len(functions)==1,'Missing explicit experiment-control policy'
E       AssertionError: Missing explicit experiment-control policy
E       assert 0 == 1
E        +  where 0 = len([])

artifacts/rust-expxa-tuning-20261103/commands/test_benchmark_controls.py:8: AssertionError
=========================== short test summary info ============================
FAILED artifacts/rust-expxa-tuning-20261103/commands/test_benchmark_controls.py::test_prep_ablation_changes_only_one_control
1 failed in 0.11s
