TUnit.Engine 0.61.25

🚀 The Modern Testing Framework for .NET

TUnit is a next-generation testing framework for C# that outpaces traditional frameworks with source-generated tests, parallel execution by default, and Native AOT support. Built on the modern Microsoft.Testing.Platform, TUnit delivers faster test runs, better developer experience, and unmatched flexibility.

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⚡ Why Choose TUnit?

Feature	Traditional Frameworks	TUnit
Test Discovery	❌ Runtime reflection	✅ Compile-time generation
Execution Speed	❌ Sequential by default	✅ Parallel by default
Modern .NET	⚠️ Limited AOT support	✅ Full Native AOT & trimming
Test Dependencies	❌ Not supported	✅ [DependsOn] chains
Resource Management	❌ Manual lifecycle	✅ Intelligent cleanup

⚡ Parallel by Default - Tests run concurrently with intelligent dependency management

🎯 Compile-Time Discovery - Know your test structure before runtime

🔧 Modern .NET Ready - Native AOT, trimming, and latest .NET features

🎭 Extensible - Customize data sources, attributes, and test behavior

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📚 Complete Documentation & Learning Center

🚀 New to TUnit? Start with our Getting Started Guide

🔄 Migrating? See our Migration Guides

🎯 Advanced Features? Explore Data-Driven Testing, Test Dependencies, and Parallelism Control

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🏁 Quick Start

Using the Project Template (Recommended)

dotnet new install TUnit.Templates
dotnet new TUnit -n "MyTestProject"

Manual Installation

dotnet add package TUnit --prerelease

📖 📚 Complete Documentation & Guides - Everything you need to master TUnit

✨ Key Features

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🚀 Performance & Modern Platform

• 🔥 Source-generated tests (no reflection)
• ⚡ Parallel execution by default
• 🚀 Native AOT & trimming support
• 📈 Optimized for performance

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🎯 Advanced Test Control

• 🔗 Test dependencies with [DependsOn]
• 🎛️ Parallel limits & custom scheduling
• 🛡️ Built-in analyzers & compile-time checks
• 🎭 Custom attributes & extensible conditions

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📊 Rich Data & Assertions

• 📋 Multiple data sources ([Arguments], [Matrix], [ClassData])
• ✅ Fluent async assertions
• 🔄 Smart retry logic & conditional execution
• 📝 Rich test metadata & context

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🔧 Developer Experience

• 💉 Full dependency injection support
• 🪝 Comprehensive lifecycle hooks
• 🎯 IDE integration (VS, Rider, VS Code)
• 📚 Extensive documentation & examples

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📝 Simple Test Example

[Test]
public async Task User_Creation_Should_Set_Timestamp()
{
    // Arrange
    var userService = new UserService();

    // Act
    var user = await userService.CreateUserAsync("john.doe@example.com");

    // Assert - TUnit's fluent assertions
    await Assert.That(user.CreatedAt)
        .IsEqualTo(DateTime.Now)
        .Within(TimeSpan.FromMinutes(1));

    await Assert.That(user.Email)
        .IsEqualTo("john.doe@example.com");
}

🎯 Data-Driven Testing

[Test]
[Arguments("user1@test.com", "ValidPassword123")]
[Arguments("user2@test.com", "AnotherPassword456")]
[Arguments("admin@test.com", "AdminPass789")]
public async Task User_Login_Should_Succeed(string email, string password)
{
    var result = await authService.LoginAsync(email, password);
    await Assert.That(result.IsSuccess).IsTrue();
}

// Matrix testing - tests all combinations
[Test]
[MatrixDataSource]
public async Task Database_Operations_Work(
    [Matrix("Create", "Update", "Delete")] string operation,
    [Matrix("User", "Product", "Order")] string entity)
{
    await Assert.That(await ExecuteOperation(operation, entity))
        .IsTrue();
}

🔗 Advanced Test Orchestration

[Before(Class)]
public static async Task SetupDatabase(ClassHookContext context)
{
    await DatabaseHelper.InitializeAsync();
}

[Test, DisplayName("Register a new account")]
[MethodDataSource(nameof(GetTestUsers))]
public async Task Register_User(string username, string password)
{
    // Test implementation
}

[Test, DependsOn(nameof(Register_User))]
[Retry(3)] // Retry on failure
public async Task Login_With_Registered_User(string username, string password)
{
    // This test runs after Register_User completes
}

[Test]
[ParallelLimit<LoadTestParallelLimit>] // Custom parallel control
[Repeat(100)] // Run 100 times
public async Task Load_Test_Homepage()
{
    // Performance testing
}

// Custom attributes
[Test, WindowsOnly, RetryOnHttpError(5)]
public async Task Windows_Specific_Feature()
{
    // Platform-specific test with custom retry logic
}

public class LoadTestParallelLimit : IParallelLimit
{
    public int Limit => 10; // Limit to 10 concurrent executions
}

🔧 Smart Test Control

// Custom conditional execution
public class WindowsOnlyAttribute : SkipAttribute
{
    public WindowsOnlyAttribute() : base("Windows only test") { }

    public override Task<bool> ShouldSkip(TestContext testContext)
        => Task.FromResult(!OperatingSystem.IsWindows());
}

// Custom retry logic
public class RetryOnHttpErrorAttribute : RetryAttribute
{
    public RetryOnHttpErrorAttribute(int times) : base(times) { }

    public override Task<bool> ShouldRetry(TestInformation testInformation,
        Exception exception, int currentRetryCount)
        => Task.FromResult(exception is HttpRequestException { StatusCode: HttpStatusCode.ServiceUnavailable });
}

🎯 Perfect For Every Testing Scenario

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🧪 Unit Testing

[Test]
[Arguments(1, 2, 3)]
[Arguments(5, 10, 15)]
public async Task Calculate_Sum(int a, int b, int expected)
{
    await Assert.That(Calculator.Add(a, b))
        .IsEqualTo(expected);
}

Fast, isolated, and reliable

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🔗 Integration Testing

[Test, DependsOn(nameof(CreateUser))]
public async Task Login_After_Registration()
{
    // Runs after CreateUser completes
    var result = await authService.Login(user);
    await Assert.That(result.IsSuccess).IsTrue();
}

Stateful workflows made simple

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⚡ Load Testing

[Test]
[ParallelLimit<LoadTestLimit>]
[Repeat(1000)]
public async Task API_Handles_Concurrent_Requests()
{
    await Assert.That(await httpClient.GetAsync("/api/health"))
        .HasStatusCode(HttpStatusCode.OK);
}

Built-in performance testing

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🚀 What Makes TUnit Different?

Compile-Time Intelligence

Tests are discovered at build time, not runtime - enabling faster discovery, better IDE integration, and precise resource lifecycle management.

Parallel-First Architecture

Built for concurrency from day one with [DependsOn] for test chains, [ParallelLimit] for resource control, and intelligent scheduling.

Extensible by Design

The DataSourceGenerator<T> pattern and custom attribute system let you extend TUnit's capabilities without modifying core framework code.

🏆 Community & Ecosystem

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🌟 Join thousands of developers modernizing their testing

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🤝 Active Community

• 📚 Official Documentation - Comprehensive guides, tutorials, and API reference
• 💬 GitHub Discussions - Get help and share ideas
• 🐛 Issue Tracking - Report bugs and request features
• 📢 Release Notes - Stay updated with latest improvements

🛠️ IDE Support

TUnit works seamlessly across all major .NET development environments:

Visual Studio (2022 17.13+)

✅ Fully supported - No additional configuration needed for latest versions

⚙️ Earlier versions: Enable "Use testing platform server mode" in Tools > Manage Preview Features

JetBrains Rider

✅ Fully supported

⚙️ Setup: Enable "Testing Platform support" in Settings > Build, Execution, Deployment > Unit Testing > VSTest

Visual Studio Code

✅ Fully supported

⚙️ Setup: Install C# Dev Kit and enable "Use Testing Platform Protocol"

Command Line

✅ Full CLI support - Works with dotnet test, dotnet run, and direct executable execution

📦 Package Options

Package	Use Case
TUnit	⭐ Start here - Complete testing framework (includes Core + Engine + Assertions)
TUnit.Core	📚 Test libraries and shared components (no execution engine)
TUnit.Engine	🚀 Test execution engine and adapter (for test projects)
TUnit.Assertions	✅ Standalone assertions (works with any test framework)
TUnit.Playwright	🎭 Playwright integration with automatic lifecycle management

🎯 Migration from Other Frameworks

Coming from NUnit or xUnit? TUnit maintains familiar syntax while adding modern capabilities:

// Enhanced with TUnit's advanced features
[Test]
[Arguments("value1")]
[Arguments("value2")]
[Retry(3)]
[ParallelLimit<CustomLimit>]
public async Task Modern_TUnit_Test(string value) { }

📖 Need help migrating? Check our detailed Migration Guides with step-by-step instructions for xUnit, NUnit, and MSTest.

💡 Current Status

The API is mostly stable, but may have some changes based on feedback or issues before v1.0 release.

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🚀 Ready to Experience the Future of .NET Testing?

⚡ Start in 30 Seconds

# Create a new test project with examples
dotnet new install TUnit.Templates && dotnet new TUnit -n "MyAwesomeTests"

# Or add to existing project
dotnet add package TUnit --prerelease

🎯 Why Wait? Join the Movement

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📈 Performance

Optimized execution Parallel by default Zero reflection overhead

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🔮 Future-Ready

Native AOT support Latest .NET features Source generation

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🛠️ Developer Experience

Compile-time checks Rich IDE integration Intelligent debugging

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🎭 Flexibility

Test dependencies Custom attributes Extensible architecture

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📖 Learn More: tunit.dev | 💬 Get Help: GitHub Discussions | ⭐ Show Support: Star on GitHub

TUnit is actively developed and production-ready. Join our growing community of developers who've made the switch!

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Performance Benchmark

Scenario: Building the test project

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
Build_TUnit	0.61.13	1.918 s	0.1560 s	0.4550 s	1.812 s
Build_NUnit	4.4.0	1.625 s	0.1525 s	0.4497 s	1.522 s
Build_xUnit	2.9.3	1.268 s	0.1006 s	0.2952 s	1.196 s
Build_MSTest	3.10.4	1.532 s	0.1190 s	0.3452 s	1.497 s

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
Build_TUnit	0.61.13	1.836 s	0.0367 s	0.0408 s	1.830 s
Build_NUnit	4.4.0	1.509 s	0.0134 s	0.0125 s	1.511 s
Build_xUnit	2.9.3	1.526 s	0.0123 s	0.0115 s	1.527 s
Build_MSTest	3.10.4	1.521 s	0.0188 s	0.0176 s	1.523 s

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
Build_TUnit	0.61.13	1.973 s	0.0382 s	0.0454 s	1.967 s
Build_NUnit	4.4.0	1.674 s	0.0181 s	0.0160 s	1.674 s
Build_xUnit	2.9.3	1.671 s	0.0264 s	0.0247 s	1.679 s
Build_MSTest	3.10.4	1.682 s	0.0266 s	0.0236 s	1.691 s

Scenario: Tests focused on assertion performance and validation

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	110.9 ms	2.11 ms	5.44 ms	108.9 ms
TUnit	0.61.13	739.7 ms	54.94 ms	160.26 ms	705.9 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	1,060.2 ms	56.19 ms	165.67 ms	1,044.3 ms
MSTest	3.10.4	983.8 ms	60.84 ms	179.40 ms	953.0 ms

Benchmarks with issues: RuntimeBenchmarks.NUnit: Job-YNJDZW(Runtime=.NET 9.0)

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	28.40 ms	0.531 ms	0.497 ms	28.43 ms
TUnit	0.61.13	972.30 ms	19.263 ms	20.611 ms	969.97 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	1,413.87 ms	15.619 ms	14.610 ms	1,409.06 ms
MSTest	3.10.4	1,284.40 ms	16.824 ms	14.914 ms	1,285.14 ms

Benchmarks with issues: RuntimeBenchmarks.NUnit: Job-YNJDZW(Runtime=.NET 9.0)

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	64.52 ms	1.452 ms	4.189 ms	63.69 ms
TUnit	0.61.13	1,140.79 ms	22.787 ms	44.979 ms	1,136.18 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	1,562.14 ms	19.368 ms	17.170 ms	1,558.80 ms
MSTest	3.10.4	1,453.56 ms	29.005 ms	27.131 ms	1,444.95 ms

Benchmarks with issues: RuntimeBenchmarks.NUnit: Job-YNJDZW(Runtime=.NET 9.0)

Scenario: Tests running asynchronous operations and async/await patterns

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	162.1 ms	13.28 ms	38.32 ms	152.6 ms
TUnit	0.61.13	924.6 ms	65.33 ms	189.54 ms	887.3 ms
NUnit	4.4.0	1,724.4 ms	151.93 ms	447.96 ms	1,706.2 ms
xUnit	2.9.3	1,262.2 ms	100.37 ms	291.20 ms	1,180.1 ms
MSTest	3.10.4	1,003.0 ms	45.14 ms	130.24 ms	972.0 ms

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	27.23 ms	0.512 ms	0.479 ms	27.19 ms
TUnit	0.61.13	930.66 ms	17.773 ms	21.158 ms	928.50 ms
NUnit	4.4.0	1,305.07 ms	11.768 ms	11.008 ms	1,305.56 ms
xUnit	2.9.3	1,456.88 ms	22.017 ms	20.594 ms	1,452.03 ms
MSTest	3.10.4	1,283.79 ms	16.823 ms	15.736 ms	1,281.50 ms

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	70.22 ms	1.403 ms	3.079 ms	69.96 ms
TUnit	0.61.13	1,133.62 ms	25.501 ms	71.508 ms	1,119.23 ms
NUnit	4.4.0	1,605.22 ms	19.582 ms	34.296 ms	1,608.29 ms
xUnit	2.9.3	1,711.36 ms	23.829 ms	22.289 ms	1,715.93 ms
MSTest	3.10.4	1,422.68 ms	27.860 ms	45.775 ms	1,403.96 ms

Scenario: Simple tests with basic operations and assertions

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	188.5 ms	18.39 ms	54.22 ms	172.9 ms
TUnit	0.61.13	1,311.5 ms	115.60 ms	337.20 ms	1,347.2 ms
NUnit	4.4.0	1,485.0 ms	102.18 ms	299.66 ms	1,472.0 ms
xUnit	2.9.3	1,203.7 ms	111.84 ms	320.89 ms	1,114.6 ms
MSTest	3.10.4	924.4 ms	44.11 ms	125.12 ms	927.6 ms

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 3.39GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	26.66 ms	0.498 ms	1.051 ms	26.68 ms
TUnit	0.61.13	913.18 ms	17.930 ms	21.344 ms	912.30 ms
NUnit	4.4.0	1,270.94 ms	17.391 ms	16.268 ms	1,277.04 ms
xUnit	2.9.3	1,333.17 ms	14.489 ms	13.553 ms	1,333.56 ms
MSTest	3.10.4	1,214.79 ms	14.611 ms	13.668 ms	1,215.54 ms

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	63.84 ms	1.394 ms	4.067 ms	63.36 ms
TUnit	0.61.13	1,070.82 ms	20.806 ms	23.960 ms	1,062.79 ms
NUnit	4.4.0	1,451.12 ms	15.863 ms	14.838 ms	1,447.88 ms
xUnit	2.9.3	1,512.73 ms	13.653 ms	11.401 ms	1,513.74 ms
MSTest	3.10.4	1,427.97 ms	24.734 ms	21.926 ms	1,430.61 ms

Scenario: Parameterized tests with multiple test cases using data attributes

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	150.6 ms	9.58 ms	27.48 ms	146.4 ms
TUnit	0.61.13	1,061.2 ms	107.15 ms	309.16 ms	1,004.8 ms
NUnit	4.4.0	1,392.6 ms	128.04 ms	363.23 ms	1,334.9 ms
xUnit	2.9.3	1,199.4 ms	89.43 ms	263.69 ms	1,147.9 ms
MSTest	3.10.4	967.6 ms	59.53 ms	168.89 ms	939.1 ms

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.87GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	27.47 ms	0.538 ms	0.899 ms	27.35 ms
TUnit	0.61.13	909.47 ms	17.837 ms	19.085 ms	902.41 ms
NUnit	4.4.0	1,272.36 ms	10.482 ms	9.805 ms	1,274.02 ms
xUnit	2.9.3	1,342.49 ms	5.426 ms	4.810 ms	1,344.06 ms
MSTest	3.10.4	1,217.09 ms	6.172 ms	5.774 ms	1,217.55 ms

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	69.27 ms	1.845 ms	5.439 ms	69.29 ms
TUnit	0.61.13	1,144.21 ms	22.870 ms	59.442 ms	1,129.41 ms
NUnit	4.4.0	1,596.92 ms	31.655 ms	57.883 ms	1,596.86 ms
xUnit	2.9.3	1,798.12 ms	57.406 ms	164.708 ms	1,806.71 ms
MSTest	3.10.4	1,561.06 ms	23.643 ms	22.116 ms	1,566.69 ms

Scenario: Tests utilizing class fixtures and shared test context

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	157.2 ms	9.78 ms	28.67 ms	151.0 ms
TUnit	0.61.13	716.3 ms	44.38 ms	127.32 ms	695.7 ms
NUnit	4.4.0	925.9 ms	41.36 ms	121.94 ms	892.5 ms
xUnit	2.9.3	889.7 ms	26.16 ms	75.46 ms	883.8 ms
MSTest	3.10.4	NA	NA	NA	NA

Benchmarks with issues: RuntimeBenchmarks.MSTest: Job-YNJDZW(Runtime=.NET 9.0)

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 3.15GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	27.09 ms	0.507 ms	0.474 ms	26.90 ms
TUnit	0.61.13	944.08 ms	18.351 ms	19.635 ms	946.04 ms
NUnit	4.4.0	1,308.89 ms	10.780 ms	10.083 ms	1,308.97 ms
xUnit	2.9.3	1,387.90 ms	14.870 ms	13.909 ms	1,389.48 ms
MSTest	3.10.4	NA	NA	NA	NA

Benchmarks with issues: RuntimeBenchmarks.MSTest: Job-YNJDZW(Runtime=.NET 9.0)

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	63.49 ms	1.622 ms	4.756 ms	62.05 ms
TUnit	0.61.13	1,098.28 ms	20.921 ms	47.648 ms	1,095.75 ms
NUnit	4.4.0	1,494.53 ms	29.750 ms	72.415 ms	1,458.86 ms
xUnit	2.9.3	1,669.62 ms	48.125 ms	136.522 ms	1,647.94 ms
MSTest	3.10.4	NA	NA	NA	NA

Benchmarks with issues: RuntimeBenchmarks.MSTest: Job-YNJDZW(Runtime=.NET 9.0)

Scenario: Tests executing in parallel to test framework parallelization

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	211.4 ms	16.11 ms	47.50 ms	212.1 ms
TUnit	0.61.13	1,074.9 ms	108.97 ms	317.86 ms	1,016.4 ms
NUnit	4.4.0	1,147.3 ms	72.65 ms	211.91 ms	1,123.8 ms
xUnit	2.9.3	946.3 ms	43.38 ms	127.89 ms	930.7 ms
MSTest	3.10.4	829.3 ms	30.12 ms	88.33 ms	821.0 ms

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	26.92 ms	0.465 ms	0.435 ms	26.80 ms
TUnit	0.61.13	939.12 ms	18.640 ms	24.884 ms	928.86 ms
NUnit	4.4.0	1,336.50 ms	7.967 ms	7.063 ms	1,338.63 ms
xUnit	2.9.3	1,410.05 ms	9.572 ms	8.953 ms	1,409.42 ms
MSTest	3.10.4	1,288.37 ms	13.379 ms	11.860 ms	1,286.14 ms

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	67.61 ms	1.937 ms	5.710 ms	66.98 ms
TUnit	0.61.13	1,172.75 ms	23.190 ms	39.378 ms	1,167.36 ms
NUnit	4.4.0	1,622.89 ms	19.758 ms	18.481 ms	1,622.22 ms
xUnit	2.9.3	1,735.38 ms	28.309 ms	25.095 ms	1,729.16 ms
MSTest	3.10.4	1,548.46 ms	28.994 ms	73.272 ms	1,554.57 ms

Scenario: A test that takes 50ms to execute, repeated 100 times

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	315.6 ms	26.51 ms	78.17 ms	314.5 ms
TUnit	0.61.13	1,151.9 ms	92.54 ms	271.39 ms	1,070.6 ms
NUnit	4.4.0	1,002.5 ms	66.38 ms	188.32 ms	970.0 ms
xUnit	2.9.3	986.2 ms	48.20 ms	139.85 ms	984.7 ms
MSTest	3.10.4	1,040.7 ms	43.33 ms	127.76 ms	1,008.0 ms

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.91GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	38.91 ms	0.303 ms	0.253 ms	38.87 ms
TUnit	0.61.13	950.57 ms	18.019 ms	22.129 ms	945.27 ms
NUnit	4.4.0	1,301.97 ms	15.537 ms	14.533 ms	1,299.41 ms
xUnit	2.9.3	1,461.88 ms	15.843 ms	14.819 ms	1,463.17 ms
MSTest	3.10.4	1,324.48 ms	12.798 ms	11.345 ms	1,327.26 ms

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	73.73 ms	1.441 ms	1.541 ms	73.50 ms
TUnit	0.61.13	1,093.55 ms	21.088 ms	28.866 ms	1,084.83 ms
NUnit	4.4.0	1,513.95 ms	30.249 ms	74.768 ms	1,476.68 ms
xUnit	2.9.3	1,675.04 ms	33.426 ms	45.754 ms	1,662.99 ms
MSTest	3.10.4	1,488.84 ms	22.205 ms	19.684 ms	1,492.05 ms

Scenario: Tests with setup and teardown lifecycle methods

macos-latest

BenchmarkDotNet v0.15.3, macOS Sequoia 15.6.1 (24G90) [Darwin 24.6.0]
Apple M1 (Virtual), 1 CPU, 3 logical and 3 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), Arm64 RyuJIT armv8.0-a

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	231.4 ms	20.05 ms	59.12 ms	229.8 ms
TUnit	0.61.13	1,088.3 ms	82.32 ms	242.71 ms	1,046.1 ms
NUnit	4.4.0	1,198.5 ms	100.16 ms	293.75 ms	1,129.5 ms
xUnit	2.9.3	835.6 ms	16.51 ms	43.50 ms	839.8 ms
MSTest	3.10.4	772.8 ms	17.93 ms	52.57 ms	785.9 ms

ubuntu-latest

BenchmarkDotNet v0.15.3, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.73GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	28.02 ms	0.554 ms	1.358 ms	28.10 ms
TUnit	0.61.13	925.55 ms	17.858 ms	19.107 ms	925.64 ms
NUnit	4.4.0	1,288.93 ms	9.420 ms	8.351 ms	1,290.03 ms
xUnit	2.9.3	1,352.49 ms	8.971 ms	7.491 ms	1,354.17 ms
MSTest	3.10.4	1,234.98 ms	9.729 ms	9.100 ms	1,234.56 ms

windows-latest

BenchmarkDotNet v0.15.3, Windows 11 (10.0.26100.4946/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 7763 2.44GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 9.0.305
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit_AOT	0.61.13	66.57 ms	1.882 ms	5.491 ms	66.53 ms
TUnit	0.61.13	1,105.22 ms	21.302 ms	51.446 ms	1,104.05 ms
NUnit	4.4.0	1,550.45 ms	30.506 ms	49.261 ms	1,560.91 ms
xUnit	2.9.3	1,692.52 ms	33.832 ms	33.228 ms	1,687.74 ms
MSTest	3.10.4	1,543.52 ms	30.775 ms	57.802 ms	1,540.19 ms