DeezyMatch example notebooks don't work

[mcollardanuy]

The following notebooks don't work:

• https://github.com/Living-with-machines/T-Res/blob/dev/examples/train_use_deezy_model_1.ipynb
• https://github.com/Living-with-machines/T-Res/blob/dev/examples/train_use_deezy_model_2.ipynb

It seems the issue is when do_test is set to True.

I've opened an issue: #268