Trying to set with `-S time_limit=60` fails with the following error: ```console WARNING: skipping test 'my_test': value error: invalid format for timer field (rerun with '-v' for more information) ``` However, the `time_limit` can be set as an integer according to the [docs](https://reframe-hpc.readthedocs.io/en/stable/regression_test_api.html#reframe.core.pipeline.RegressionTest.time_limit).
