This may be nitpicking since it's a test fixture, but according to [RFC 5737](https://tools.ietf.org/html/rfc5737) there are 3 blocks reserved for documentation purposes:

```
   The blocks 192.0.2.0/24 (TEST-NET-1), 198.51.100.0/24 (TEST-NET-2),
   and 203.0.113.0/24 (TEST-NET-3) are provided for use in
   documentation.
```

I think it's better to use than an IP belonging to France Telecom for ADSL users.