The test uses iter([...]) directly in pytest.param(), which creates the iterator at module load/collection time, not at test execution time. In pytest, parameters are evaluated once during collection. If pytest introspects the parameters (e.g., for --collect-only, verbose output, or test reporting), or if tests are re-run, the iterator may be partially or fully consumed before the actual test executes. This makes the test unreliable and may cause false positives/negatives.