Kotest

Kotest is a test framework for Kotlin that supports several test styles with unlimited nesting, natural language test names and coroutine support at every level. Its DSL supports parameterised and data-driven tests, conditional evaluation, lifecycle callbacks and extensive parallelism.

Kotest is fully multiplatform, with support for the JVM, JavaScript, Native (Linux, Windows, iOS, macOS, tvOS, watchOS), Wasm, and Android unit and instrumented tests, integrated through the existing Kotlin Gradle tasks. Its assertions library provides over 350 assertions, and property testing is also supported.

Kotest is distributed under the Apache License 2.0 and actively developed on GitHub; version 6.2.6 was released in October 2026.