Tests are failing on this line. See below:
```
>>> import psutil
>>> psutil.net_io_counters()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'net_io_counters'
>>> psutil.network_io_counters()
iostat(bytes_sent=3129564, bytes_recv=36523743, packets_sent=24159, packets_recv=33879, errin=0, errout=0, dropin=0, dropout=0)
```