espower-loader is a browserify transform that automates the instrumentation of JavaScript test code with power-assert. It seamlessly integrates power-assert's enhanced assertion messages into browser-based testing workflows. By instrumenting your code, it provides more informative error messages, making debugging easier and faster. This loader streamlines the process of using power-assert within browserify environments, eliminating manual instrumentation steps. It significantly improves the readability and understandability of test failures, leading to more efficient test development.