TUnit.Engine 0.76.11

🚀 The Modern Testing Framework for .NET

TUnit is a modern testing framework for .NET that uses source-generated tests, parallel execution by default, and Native AOT support. Built on Microsoft.Testing.Platform, it's faster than traditional reflection-based frameworks and gives you more control over how your tests run.

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Why 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	✅ Native AOT & trimming
Test Dependencies	❌ Not supported	✅ [DependsOn] chains
Resource Management	❌ Manual lifecycle	✅ Automatic cleanup

Parallel by Default - Tests run concurrently with dependency management

Compile-Time Discovery - Test structure is known before runtime

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

Extensible - Customize data sources, attributes, and test behavior

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Documentation

New to TUnit? Start with the Getting Started Guide

Migrating? See the Migration Guides

Learn more: Data-Driven Testing, Test Dependencies, 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

Key Features

<table> <tr> <td width="50%">

Performance

• Source-generated tests (no reflection)
• Parallel execution by default
• Native AOT & trimming support
• Optimized for speed

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Test Control

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

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Data & Assertions

• Multiple data sources ([Arguments], [Matrix], [ClassData])
• Fluent async assertions
• Retry logic & conditional execution
• Test metadata & context

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Developer Tools

• Full dependency injection support
• Lifecycle hooks
• IDE integration (VS, Rider, VS Code)
• Documentation & examples

</td> </tr> </table>

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
}

Custom 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 });
}

Common Use Cases

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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);
}

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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();
}

</td> <td width="33%">

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);
}

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What Makes TUnit Different?

Compile-Time Test Discovery

Tests are discovered at build time, not runtime. This means faster discovery, better IDE integration, and more predictable resource management.

Parallel by Default

Tests run in parallel by default. Use [DependsOn] to chain tests together, and [ParallelLimit] to control resource usage.

Extensible

The DataSourceGenerator<T> pattern and custom attribute system let you extend TUnit without modifying the framework.

Community & Ecosystem

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Resources

• Official Documentation - Guides, tutorials, and API reference
• GitHub Discussions - Get help and share ideas
• Issue Tracking - Report bugs and request features
• Release Notes - Latest updates and changes

IDE Support

TUnit works with all major .NET IDEs:

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 > Testing Platform

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 uses familiar syntax with some additions:

// TUnit test with dependency management and retries
[Test]
[Arguments("value1")]
[Arguments("value2")]
[Retry(3)]
[ParallelLimit<CustomLimit>]
public async Task Modern_TUnit_Test(string value) { }

📖 Need help migrating? Check our Migration Guides for xUnit, NUnit, and MSTest.

Current Status

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

---

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Getting Started

# Create a new test project
dotnet new install TUnit.Templates && dotnet new TUnit -n "MyTestProject"

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

Learn More: tunit.dev | Get Help: GitHub Discussions | Star on GitHub: github.com/thomhurst/TUnit

</div>

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	0.66.6	1.425 s	0.0954 s	0.2722 s	1.384 s
Build_NUnit	4.4.0	1.171 s	0.0670 s	0.1934 s	1.150 s
Build_xUnit	2.9.3	1.149 s	0.0853 s	0.2448 s	1.101 s
Build_MSTest	3.11.0	1.108 s	0.0468 s	0.1365 s	1.103 s
Build_xUnit3	3.1.0	1.144 s	0.0763 s	0.2238 s	1.093 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	0.66.6	1.645 s	0.0212 s	0.0188 s	1.645 s
Build_NUnit	4.4.0	1.500 s	0.0294 s	0.0302 s	1.502 s
Build_xUnit	2.9.3	1.513 s	0.0175 s	0.0163 s	1.513 s
Build_MSTest	3.11.0	1.534 s	0.0136 s	0.0127 s	1.539 s
Build_xUnit3	3.1.0	1.496 s	0.0247 s	0.0219 s	1.500 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	0.66.6	2.134 s	0.0440 s	0.1275 s	2.143 s
Build_NUnit	4.4.0	2.085 s	0.0360 s	0.0319 s	2.085 s
Build_xUnit	2.9.3	2.055 s	0.0406 s	0.0865 s	2.057 s
Build_MSTest	3.11.0	2.160 s	0.0431 s	0.1142 s	2.152 s
Build_xUnit3	3.1.0	2.136 s	0.0424 s	0.0505 s	2.124 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	0.66.6	507.19 ms	28.541 ms	83.71 ms	497.91 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	884.34 ms	54.651 ms	160.28 ms	895.71 ms
MSTest	3.11.0	768.27 ms	39.207 ms	115.60 ms	746.33 ms
xUnit3	3.1.0	493.87 ms	16.161 ms	47.40 ms	503.28 ms
TUnit_AOT	0.66.6	70.85 ms	7.276 ms	21.34 ms	67.87 ms

Benchmarks with issues: RuntimeBenchmarks.NUnit: 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	0.66.6	487.37 ms	3.093 ms	2.893 ms	487.43 ms
NUnit	4.4.0	908.34 ms	17.276 ms	16.967 ms	911.94 ms
xUnit	2.9.3	984.77 ms	19.259 ms	18.015 ms	979.06 ms
MSTest	3.11.0	836.95 ms	11.507 ms	10.764 ms	832.08 ms
xUnit3	3.1.0	458.16 ms	4.159 ms	3.890 ms	457.83 ms
TUnit_AOT	0.66.6	25.31 ms	0.431 ms	0.382 ms	25.16 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	0.66.6	533.36 ms	3.679 ms	3.441 ms	532.96 ms
NUnit	4.4.0	1,016.18 ms	20.186 ms	34.820 ms	1,015.43 ms
xUnit	2.9.3	1,068.97 ms	20.224 ms	16.888 ms	1,073.74 ms
MSTest	3.11.0	968.58 ms	17.772 ms	31.127 ms	964.24 ms
xUnit3	3.1.0	516.29 ms	7.819 ms	6.931 ms	515.39 ms
TUnit_AOT	0.66.6	65.97 ms	2.281 ms	6.724 ms	65.43 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	0.66.6	608.9 ms	39.85 ms	117.49 ms	577.8 ms
NUnit	4.4.0	1,260.3 ms	57.30 ms	166.24 ms	1,274.6 ms
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	1,050.5 ms	41.59 ms	119.99 ms	1,053.4 ms
xUnit3	3.1.0	559.6 ms	21.67 ms	62.18 ms	567.1 ms
TUnit_AOT	0.66.6	144.6 ms	11.89 ms	34.88 ms	145.0 ms

Benchmarks with issues: 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	0.66.6	447.34 ms	3.704 ms	3.465 ms	447.86 ms
NUnit	4.4.0	907.30 ms	17.922 ms	18.404 ms	901.36 ms
xUnit	2.9.3	988.70 ms	19.061 ms	17.830 ms	983.11 ms
MSTest	3.11.0	842.79 ms	16.374 ms	17.520 ms	842.60 ms
xUnit3	3.1.0	460.86 ms	2.968 ms	2.777 ms	459.81 ms
TUnit_AOT	0.66.6	26.67 ms	0.506 ms	0.562 ms	26.78 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	0.66.6	494.36 ms	7.194 ms	6.729 ms	490.64 ms
NUnit	4.4.0	1,005.78 ms	18.596 ms	17.394 ms	1,007.02 ms
xUnit	2.9.3	1,096.34 ms	20.797 ms	22.253 ms	1,097.98 ms
MSTest	3.11.0	962.06 ms	18.672 ms	26.175 ms	957.03 ms
xUnit3	3.1.0	522.65 ms	9.988 ms	9.343 ms	521.69 ms
TUnit_AOT	0.66.6	89.31 ms	2.294 ms	6.728 ms	89.53 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	0.66.6	413.11 ms	29.400 ms	85.30 ms	389.28 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
xUnit3	3.1.0	289.63 ms	7.455 ms	21.51 ms	285.72 ms
TUnit_AOT	0.66.6	66.85 ms	9.402 ms	27.57 ms	61.87 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	0.66.6	466.81 ms	5.399 ms	4.786 ms	466.44 ms
NUnit	4.4.0	919.54 ms	16.718 ms	15.638 ms	919.80 ms
xUnit	2.9.3	994.05 ms	10.533 ms	9.337 ms	992.55 ms
MSTest	3.11.0	853.21 ms	16.534 ms	17.691 ms	854.80 ms
xUnit3	3.1.0	459.93 ms	3.301 ms	2.926 ms	458.96 ms
TUnit_AOT	0.66.6	25.34 ms	0.444 ms	0.415 ms	25.14 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	0.66.6	517.27 ms	4.416 ms	4.130 ms	518.39 ms
NUnit	4.4.0	1,018.48 ms	20.084 ms	19.725 ms	1,014.70 ms
xUnit	2.9.3	1,079.55 ms	19.399 ms	18.145 ms	1,079.08 ms
MSTest	3.11.0	950.05 ms	18.521 ms	21.329 ms	953.91 ms
xUnit3	3.1.0	509.16 ms	6.805 ms	6.365 ms	507.00 ms
TUnit_AOT	0.66.6	66.58 ms	1.505 ms	4.414 ms	65.67 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	0.66.6	408.74 ms	18.928 ms	55.21 ms	396.30 ms
NUnit	4.4.0	NA	NA	NA	NA
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	659.03 ms	22.634 ms	66.38 ms	666.53 ms
xUnit3	3.1.0	377.11 ms	11.684 ms	33.90 ms	379.14 ms
TUnit_AOT	0.66.6	44.69 ms	3.968 ms	11.39 ms	41.36 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	0.66.6	460.22 ms	2.117 ms	1.877 ms	460.03 ms
NUnit	4.4.0	909.38 ms	16.413 ms	15.352 ms	917.73 ms
xUnit	2.9.3	1,016.83 ms	18.472 ms	17.279 ms	1,008.66 ms
MSTest	3.11.0	866.29 ms	16.852 ms	18.031 ms	865.01 ms
xUnit3	3.1.0	486.65 ms	3.559 ms	3.155 ms	487.03 ms
TUnit_AOT	0.66.6	28.22 ms	0.343 ms	0.304 ms	28.31 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	0.66.6	550.13 ms	10.668 ms	10.477 ms	545.52 ms
NUnit	4.4.0	1,115.22 ms	22.111 ms	23.658 ms	1,115.33 ms
xUnit	2.9.3	1,209.43 ms	35.495 ms	100.694 ms	1,223.99 ms
MSTest	3.11.0	1,041.10 ms	20.681 ms	23.817 ms	1,038.52 ms
xUnit3	3.1.0	565.34 ms	10.258 ms	9.596 ms	565.75 ms
TUnit_AOT	0.66.6	71.69 ms	1.423 ms	3.410 ms	71.39 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	0.66.6	286.49 ms	6.152 ms	17.75 ms	285.41 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
xUnit3	3.1.0	375.36 ms	22.387 ms	66.01 ms	362.13 ms
TUnit_AOT	0.66.6	64.68 ms	6.634 ms	19.03 ms	62.08 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	0.66.6	452.99 ms	3.907 ms	3.263 ms	453.44 ms
NUnit	4.4.0	930.95 ms	14.776 ms	13.821 ms	935.97 ms
xUnit	2.9.3	1,006.26 ms	16.690 ms	15.611 ms	1,000.82 ms
MSTest	3.11.0	850.14 ms	16.934 ms	18.119 ms	852.12 ms
xUnit3	3.1.0	450.19 ms	4.025 ms	3.765 ms	450.09 ms
TUnit_AOT	0.66.6	38.57 ms	1.098 ms	3.220 ms	38.60 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	0.66.6	495.87 ms	8.424 ms	10.653 ms	492.34 ms
NUnit	4.4.0	973.98 ms	19.011 ms	18.671 ms	972.03 ms
xUnit	2.9.3	1,049.78 ms	14.531 ms	13.593 ms	1,044.49 ms
MSTest	3.11.0	916.98 ms	16.913 ms	15.821 ms	912.23 ms
xUnit3	3.1.0	486.78 ms	3.897 ms	3.645 ms	486.01 ms
TUnit_AOT	0.66.6	91.20 ms	1.800 ms	3.152 ms	91.43 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	0.66.6	410.22 ms	23.733 ms	69.23 ms	402.84 ms
NUnit	4.4.0	1,342.07 ms	95.053 ms	274.25 ms	1,303.84 ms
xUnit	2.9.3	1,328.93 ms	101.864 ms	300.35 ms	1,301.91 ms
MSTest	3.11.0	NA	NA	NA	NA
xUnit3	3.1.0	470.25 ms	20.347 ms	58.38 ms	468.24 ms
TUnit_AOT	0.66.6	58.77 ms	7.644 ms	21.93 ms	53.57 ms

Benchmarks with issues: 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	0.66.6	442.19 ms	1.731 ms	1.534 ms	441.97 ms
NUnit	4.4.0	918.06 ms	17.680 ms	17.364 ms	921.88 ms
xUnit	2.9.3	983.91 ms	18.873 ms	17.654 ms	979.36 ms
MSTest	3.11.0	838.79 ms	14.777 ms	13.823 ms	844.27 ms
xUnit3	3.1.0	449.58 ms	2.903 ms	2.573 ms	449.82 ms
TUnit_AOT	0.66.6	24.97 ms	0.208 ms	0.184 ms	24.95 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	0.66.6	510.80 ms	3.865 ms	3.616 ms	511.67 ms
NUnit	4.4.0	1,085.21 ms	21.543 ms	37.161 ms	1,079.30 ms
xUnit	2.9.3	1,125.35 ms	22.326 ms	27.418 ms	1,124.00 ms
MSTest	3.11.0	979.31 ms	15.894 ms	14.867 ms	979.73 ms
xUnit3	3.1.0	526.16 ms	5.769 ms	5.396 ms	526.42 ms
TUnit_AOT	0.66.6	65.78 ms	1.726 ms	5.063 ms	65.93 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	0.66.6	338.92 ms	19.812 ms	58.105 ms	325.53 ms
NUnit	4.4.0	574.90 ms	9.258 ms	7.228 ms	572.83 ms
xUnit	2.9.3	NA	NA	NA	NA
MSTest	3.11.0	NA	NA	NA	NA
xUnit3	3.1.0	324.91 ms	10.115 ms	29.507 ms	318.54 ms
TUnit_AOT	0.66.6	60.53 ms	8.531 ms	24.613 ms	56.15 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 2.90GHz, 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	0.66.6	486.94 ms	3.897 ms	3.645 ms	487.44 ms
NUnit	4.4.0	925.61 ms	17.307 ms	16.189 ms	922.59 ms
xUnit	2.9.3	1,085.95 ms	20.200 ms	17.906 ms	1,082.26 ms
MSTest	3.11.0	858.03 ms	16.000 ms	14.966 ms	856.06 ms
xUnit3	3.1.0	491.88 ms	4.490 ms	3.980 ms	489.95 ms
TUnit_AOT	0.66.6	40.90 ms	0.680 ms	0.636 ms	40.67 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	0.66.6	560.34 ms	10.543 ms	9.862 ms	559.08 ms
NUnit	4.4.0	1,072.50 ms	20.980 ms	45.608 ms	1,074.71 ms
xUnit	2.9.3	1,232.15 ms	24.387 ms	26.094 ms	1,232.77 ms
MSTest	3.11.0	994.43 ms	19.847 ms	54.995 ms	991.14 ms
xUnit3	3.1.0	580.80 ms	11.371 ms	15.180 ms	581.16 ms
TUnit_AOT	0.66.6	81.43 ms	2.104 ms	6.203 ms	82.90 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	0.66.6	525.73 ms	37.455 ms	108.66 ms	518.72 ms
NUnit	4.4.0	1,163.42 ms	50.082 ms	143.69 ms	1,154.49 ms
xUnit	2.9.3	1,063.35 ms	38.811 ms	113.83 ms	1,063.37 ms
MSTest	3.11.0	864.08 ms	79.507 ms	234.43 ms	768.70 ms
xUnit3	3.1.0	389.16 ms	18.371 ms	53.59 ms	391.37 ms
TUnit_AOT	0.66.6	50.16 ms	6.305 ms	18.19 ms	48.60 ms

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	0.66.6	467.37 ms	2.088 ms	1.953 ms	467.00 ms
NUnit	4.4.0	937.52 ms	18.192 ms	19.465 ms	935.06 ms
xUnit	2.9.3	1,033.10 ms	18.060 ms	16.894 ms	1,028.90 ms
MSTest	3.11.0	885.00 ms	17.336 ms	17.026 ms	882.50 ms
xUnit3	3.1.0	465.87 ms	3.757 ms	3.331 ms	465.39 ms
TUnit_AOT	0.66.6	26.79 ms	0.208 ms	0.174 ms	26.82 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	0.66.6	527.84 ms	10.425 ms	24.160 ms	521.87 ms
NUnit	4.4.0	1,069.13 ms	21.368 ms	22.864 ms	1,069.02 ms
xUnit	2.9.3	1,152.17 ms	22.381 ms	29.102 ms	1,160.05 ms
MSTest	3.11.0	994.82 ms	19.730 ms	21.929 ms	994.32 ms
xUnit3	3.1.0	544.24 ms	10.540 ms	14.071 ms	543.06 ms
TUnit_AOT	0.66.6	68.69 ms	2.349 ms	6.815 ms	68.38 ms