TUnit.Assertions 0.66.0

🚀 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

</td> <td align="center" width="25%">

🛠️ 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 v0.15.4, 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	0.63.3	1.462 s	0.1537 s	0.4532 s	1.310 s
Build_NUnit	4.4.0	1.744 s	0.1092 s	0.3168 s	1.679 s
Build_xUnit	2.9.3	1.641 s	0.1261 s	0.3698 s	1.592 s
Build_MSTest	3.11.0	1.636 s	0.1609 s	0.4668 s	1.595 s

ubuntu-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	1.677 s	0.0312 s	0.0320 s	1.674 s
Build_NUnit	4.4.0	1.494 s	0.0223 s	0.0198 s	1.490 s
Build_xUnit	2.9.3	1.516 s	0.0204 s	0.0190 s	1.515 s
Build_MSTest	3.11.0	1.563 s	0.0274 s	0.0243 s	1.551 s

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	1.816 s	0.0320 s	0.0300 s	1.813 s
Build_NUnit	4.4.0	1.740 s	0.0344 s	0.0756 s	1.741 s
Build_xUnit	2.9.3	1.746 s	0.0308 s	0.0240 s	1.745 s
Build_MSTest	3.11.0	1.949 s	0.0594 s	0.1723 s	1.945 s

Scenario: Tests focused on assertion performance and validation

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	479.46 ms	26.36 ms	77.31 ms	468.46 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	772.99 ms	27.36 ms	79.82 ms	767.38 ms
TUnit_AOT	0.63.3	78.72 ms	10.19 ms	29.88 ms	72.16 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	476.11 ms	3.318 ms	2.941 ms	475.39 ms
NUnit	4.4.0	906.72 ms	16.690 ms	15.611 ms	909.59 ms
xUnit	2.9.3	981.64 ms	17.772 ms	16.624 ms	984.23 ms
MSTest	3.11.0	837.91 ms	16.192 ms	15.146 ms	845.11 ms
TUnit_AOT	0.63.3	25.04 ms	0.435 ms	0.407 ms	24.90 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	579.08 ms	11.140 ms	11.439 ms	579.59 ms
NUnit	4.4.0	1,028.66 ms	15.662 ms	18.645 ms	1,026.26 ms
xUnit	2.9.3	1,100.01 ms	15.464 ms	14.465 ms	1,098.76 ms
MSTest	3.11.0	965.98 ms	16.841 ms	15.753 ms	969.80 ms
TUnit_AOT	0.63.3	64.84 ms	1.596 ms	4.706 ms	64.04 ms

Scenario: Tests running asynchronous operations and async/await patterns

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	367.9 ms	23.31 ms	67.62 ms	363.7 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
TUnit_AOT	0.63.3	123.0 ms	10.80 ms	30.98 ms	121.5 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 3.41GHz), 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-v4
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v4

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit	0.63.3	447.75 ms	3.328 ms	3.113 ms	448.32 ms
NUnit	4.4.0	936.85 ms	15.843 ms	14.820 ms	932.42 ms
xUnit	2.9.3	1,000.39 ms	15.065 ms	14.092 ms	997.53 ms
MSTest	3.11.0	875.87 ms	17.316 ms	17.783 ms	881.92 ms
TUnit_AOT	0.63.3	34.15 ms	1.021 ms	2.979 ms	33.99 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	487.90 ms	6.862 ms	6.419 ms	488.06 ms
NUnit	4.4.0	996.81 ms	16.090 ms	15.051 ms	1,001.60 ms
xUnit	2.9.3	1,078.25 ms	21.004 ms	25.004 ms	1,074.69 ms
MSTest	3.11.0	960.32 ms	18.866 ms	33.042 ms	957.71 ms
TUnit_AOT	0.63.3	89.64 ms	2.507 ms	7.352 ms	89.31 ms

Scenario: Simple tests with basic operations and assertions

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	284.11 ms	5.665 ms	14.11 ms	284.77 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
TUnit_AOT	0.63.3	46.96 ms	3.820 ms	11.02 ms	44.62 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	453.60 ms	3.055 ms	2.708 ms	454.25 ms
NUnit	4.4.0	899.90 ms	16.844 ms	15.756 ms	899.44 ms
xUnit	2.9.3	975.65 ms	16.601 ms	15.529 ms	975.10 ms
MSTest	3.11.0	829.74 ms	16.432 ms	17.582 ms	829.26 ms
TUnit_AOT	0.63.3	24.26 ms	0.153 ms	0.136 ms	24.29 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	514.15 ms	3.565 ms	3.160 ms	515.34 ms
NUnit	4.4.0	1,007.07 ms	20.094 ms	18.796 ms	1,016.18 ms
xUnit	2.9.3	1,072.94 ms	17.351 ms	15.381 ms	1,071.46 ms
MSTest	3.11.0	960.30 ms	19.039 ms	36.681 ms	957.30 ms
TUnit_AOT	0.63.3	65.31 ms	1.702 ms	4.910 ms	64.62 ms

Scenario: Parameterized tests with multiple test cases using data attributes

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	508.28 ms	28.742 ms	83.39 ms	503.10 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
TUnit_AOT	0.63.3	50.26 ms	5.691 ms	15.96 ms	43.02 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 3.14GHz, 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	0.63.3	455.80 ms	3.669 ms	3.253 ms	455.17 ms
NUnit	4.4.0	914.06 ms	17.555 ms	17.242 ms	914.95 ms
xUnit	2.9.3	979.27 ms	16.884 ms	15.794 ms	973.97 ms
MSTest	3.11.0	838.10 ms	16.382 ms	16.824 ms	838.29 ms
TUnit_AOT	0.63.3	26.17 ms	0.143 ms	0.111 ms	26.19 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	538.01 ms	8.772 ms	8.206 ms	537.61 ms
NUnit	4.4.0	1,073.69 ms	19.276 ms	18.031 ms	1,073.06 ms
xUnit	2.9.3	1,213.12 ms	24.081 ms	36.043 ms	1,203.63 ms
MSTest	3.11.0	944.38 ms	18.063 ms	36.898 ms	940.78 ms
TUnit_AOT	0.63.3	70.66 ms	1.623 ms	4.604 ms	69.71 ms

Scenario: Tests utilizing class fixtures and shared test context

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	288.07 ms	5.635 ms	8.434 ms	286.94 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	538.04 ms	10.750 ms	27.939 ms	537.81 ms
TUnit_AOT	0.63.3	61.74 ms	7.554 ms	22.155 ms	57.27 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.61GHz, 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	0.63.3	455.15 ms	5.557 ms	5.198 ms	455.25 ms
NUnit	4.4.0	915.64 ms	17.609 ms	18.083 ms	911.62 ms
xUnit	2.9.3	988.17 ms	13.009 ms	12.169 ms	983.08 ms
MSTest	3.11.0	844.43 ms	16.200 ms	16.636 ms	840.44 ms
TUnit_AOT	0.63.3	41.37 ms	1.147 ms	3.365 ms	41.22 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/HudsonValley) (Hyper-V)
Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 2.79GHz), 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-v4
  Job-YNJDZW : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v4

Runtime=.NET 9.0  

Method	Version	Mean	Error	StdDev	Median
TUnit	0.63.3	462.52 ms	2.747 ms	2.435 ms	462.57 ms
NUnit	4.4.0	960.55 ms	16.492 ms	15.427 ms	955.02 ms
xUnit	2.9.3	1,023.13 ms	14.747 ms	13.795 ms	1,020.79 ms
MSTest	3.11.0	902.64 ms	17.032 ms	15.932 ms	904.73 ms
TUnit_AOT	0.63.3	75.34 ms	1.815 ms	5.352 ms	75.61 ms

Scenario: Tests executing in parallel to test framework parallelization

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	363.11 ms	21.655 ms	63.17 ms	355.38 ms
NUnit	4.4.0	810.36 ms	39.599 ms	116.14 ms	817.71 ms
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
TUnit_AOT	0.63.3	52.73 ms	7.951 ms	23.32 ms	47.71 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, Linux Ubuntu 24.04.3 LTS (Noble Numbat)
AMD EPYC 7763 2.60GHz, 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	0.63.3	447.17 ms	4.052 ms	3.790 ms	446.70 ms
NUnit	4.4.0	923.05 ms	15.178 ms	14.197 ms	923.63 ms
xUnit	2.9.3	1,005.70 ms	19.824 ms	25.071 ms	1,012.18 ms
MSTest	3.11.0	846.51 ms	16.324 ms	18.145 ms	847.05 ms
TUnit_AOT	0.63.3	24.71 ms	0.117 ms	0.104 ms	24.71 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	483.76 ms	3.091 ms	2.892 ms	482.96 ms
NUnit	4.4.0	989.91 ms	19.172 ms	18.830 ms	990.27 ms
xUnit	2.9.3	1,050.50 ms	15.138 ms	14.160 ms	1,052.16 ms
MSTest	3.11.0	917.36 ms	17.850 ms	18.331 ms	919.22 ms
TUnit_AOT	0.63.3	61.39 ms	1.670 ms	4.899 ms	60.37 ms

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

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	354.33 ms	18.244 ms	51.76 ms	342.33 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
TUnit_AOT	0.63.3	71.02 ms	8.697 ms	24.39 ms	68.41 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	487.20 ms	5.421 ms	4.805 ms	486.93 ms
NUnit	4.4.0	939.51 ms	18.004 ms	17.683 ms	938.30 ms
xUnit	2.9.3	1,091.21 ms	21.753 ms	20.348 ms	1,094.17 ms
MSTest	3.11.0	867.68 ms	17.173 ms	19.777 ms	872.92 ms
TUnit_AOT	0.63.3	40.28 ms	0.781 ms	0.767 ms	40.06 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	547.41 ms	7.923 ms	7.412 ms	544.94 ms
NUnit	4.4.0	1,042.01 ms	20.683 ms	20.314 ms	1,044.61 ms
xUnit	2.9.3	1,256.12 ms	37.748 ms	111.302 ms	1,201.34 ms
MSTest	3.11.0	990.59 ms	19.476 ms	36.100 ms	983.32 ms
TUnit_AOT	0.63.3	76.87 ms	1.118 ms	0.933 ms	77.14 ms

Scenario: Tests with setup and teardown lifecycle methods

macos-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	306.88 ms	12.220 ms	34.863 ms	297.15 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
TUnit_AOT	0.63.3	38.42 ms	3.037 ms	8.811 ms	37.08 ms

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

ubuntu-latest

BenchmarkDotNet v0.15.4, 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	0.63.3	455.06 ms	4.366 ms	3.871 ms	456.07 ms
NUnit	4.4.0	921.14 ms	16.321 ms	15.267 ms	920.60 ms
xUnit	2.9.3	1,004.66 ms	17.672 ms	16.530 ms	999.12 ms
MSTest	3.11.0	853.92 ms	16.796 ms	15.711 ms	845.49 ms
TUnit_AOT	0.63.3	25.88 ms	0.175 ms	0.164 ms	25.89 ms

windows-latest

BenchmarkDotNet v0.15.4, Windows 11 (10.0.26100.6584/24H2/2024Update/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	0.63.3	493.83 ms	2.563 ms	2.397 ms	493.07 ms
NUnit	4.4.0	999.26 ms	19.901 ms	25.168 ms	996.23 ms
xUnit	2.9.3	1,057.71 ms	15.826 ms	14.804 ms	1,058.51 ms
MSTest	3.11.0	934.66 ms	17.020 ms	17.478 ms	934.94 ms
TUnit_AOT	0.63.3	62.90 ms	1.511 ms	4.455 ms	62.61 ms