What is not an advantage of white box testing?

In the context of software testing, white box testing provides numerous benefits, such as uncovering hidden errors, thoroughly testing logic paths, and aiding in code optimization. However, claiming that it usually has lower costs than black box testing is not accurate.

White box testing requires a deep understanding of the inner workings of the application, necessitating specialized skills and knowledge of the source code. This often leads to more complex test design, more detailed documentation, and potentially more time-consuming test processes. In contrast, black box testing focuses on examining functionality without any knowledge of the internal code, which can sometimes allow for quicker, more cost-effective testing.

Thus, while white box testing has several advantages in terms of error detection, path coverage, and code optimization, it does not typically result in lower costs compared to black box testing.