Sometimes justifiably, we stop trusting someone’s testimony when we catch that person repeatedly on a lie. But what is the reason why we assign less credibility to someone if nothing justifies the lack of trust? When we give a person less credibility than she deserves because she belongs to a particular social group, we are committing a testimonial injustice. Is this due to factors that are individual (explicit prejudices and implicit biases) or structural (social norms and conventions, institutions and material (...) reality)? These two approaches differ both in their versions of the causes of these injustices and how to intervene to resist them. However, they can be easily integrated. (shrink)