Usability Testing Tip
There are strong debates about the time when the interface can be usability tested.
From one point of view, low-fidelity wireframes require less time to make changes. But they might spoil the testing results as there are many nuances that might mislead a respondent.
The optimal solution will be to offer not very polished prototype but include the real content. This way, you will be able to imitate more realistic experience.