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Kotest

Ch 017.6of 32 Unit Testing Frameworks
  1. 1Runs onAndroid, iOS, Linux, Mac, Web, Windows
  2. 2CostsFree plan
  3. 3Supported languagesKotlin
  4. 4Built-in mocksNo
  5. 5Parameterized casesYes
  6. 6Parallel executionYes
  7. 7Snapshot testingYes
  8. 8Property-based checksYes
8 lines stated Written from the maker's own pages: kotest.io
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The Kotest homepage

Overview

Kotest is ranked #1 of 32 in unit testing frameworks on Specifiction. It runs on Android, iOS, Linux, macOS, Web, Windows. There is a free plan.

Kotest plans and pricing

All plans
Kotest Free Test framework, assertions library and property testing are standalone projects that can be used independently kotest.io · 2 Oct 2026

Compared on unit testing frameworks

Free plan
Yeskotest.io
Supported languages
Kotlinkotest.io
Built-in mocks
Nokotest.io
Parameterized cases
Yeskotest.io
Parallel execution
Yeskotest.io
Snapshot testing
Yeskotest.io
Property-based checks
Yeskotest.io

Facts

What it does
Kotest is a multiplatform Kotlin testing framework with assertions, property testing and expressive test styles.kotest.io · 2 Oct 2026
Test styles
The framework offers multiple test styles, including natural language test names and unlimited nesting.kotest.io · 2 Oct 2026
Test execution
Its DSL supports parameterized and data driven tests, conditional evaluation, lifecycle callbacks and parallelism.kotest.io · 2 Oct 2026
Assertions
Kotest provides over 350 matchers, plus collection inspectors, soft assertions and utilities for non-deterministic code.kotest.io · 2 Oct 2026
Property testing
Property tests can generate hundreds or thousands of inputs, and the property testing framework is supported on all targets.kotest.io · 2 Oct 2026
Platform support
The site lists JVM, JavaScript, Native targets including Linux, Windows, iOS and macOS, Wasm, and Android unit and instrumented tests.kotest.io · 2 Oct 2026
Build support
The quick start gives setup instructions for Gradle, Maven and Kotlin Multiplatform projects.kotest.io · 2 Oct 2026
Integrations
Documented integrations include Spring, Koin, Ktor, Allure, Testcontainers, WireMock and Micronaut.kotest.io · 2 Oct 2026
IDE support
The Kotest IntelliJ plugin provides test run icons, results in the editor, a test explorer, structure highlighting and breadcrumbs.kotest.io · 2 Oct 2026
Support
The project links to community support on Slack, GitHub and Stack Overflow.kotest.io · 2 Oct 2026
Use with other frameworks
The assertions library can be used with Kotest or another test framework such as JUnit or Spock.kotest.io · 2 Oct 2026
Security and compliance
The opened Kotest pages do not state security certifications or compliance claims.kotest.io · 2 Oct 2026
Audience
Kotest is intended for Kotlin projects that need testing on JVM and Kotlin Multiplatform targets.kotest.io · 2 Oct 2026

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Where it ranks on Specifiction

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Sources