Why do I get a message about using a Macrobenchmark with ... a Macrobenchmark?

[benson-basis]

All my methods are annotated with @Macrobenchmark.

  Messages:
    INFO: This experiment does not require a microbenchmark. The granularity of the timer (215ns) is less than 0.1% of the measured runtime. If all experiments for this benchmark have runtimes greater than 215μs, consider the macrobenchmark instrument.