Environment Variables

TUnit supports configuration through environment variables, allowing you to set defaults without modifying command-line arguments. This is particularly useful for CI/CD pipelines and development environments.

TUnit-Specific Environment Variables

TUNIT_DISABLE_LOGO

Disables the TUnit ASCII art logo when starting a test session.

# Bash/Linux/macOS
export TUNIT_DISABLE_LOGO=true

# PowerShell
$env:TUNIT_DISABLE_LOGO = "true"

# Windows Command Prompt
set TUNIT_DISABLE_LOGO=true

Equivalent to: --disable-logo

Use case: Reduces output noise in CI/CD logs or when using AI/LLM coding assistants that parse test output.

TUNIT_DISABLE_GITHUB_REPORTER

Disables the automatic GitHub Actions test summary reporter.

export TUNIT_DISABLE_GITHUB_REPORTER=true

Use case: When you want to use a custom reporting solution instead of the built-in GitHub Actions integration.

TUNIT_GITHUB_REPORTER_STYLE

Controls the style of the GitHub Actions test reporter output.

export TUNIT_GITHUB_REPORTER_STYLE=collapsible  # default
export TUNIT_GITHUB_REPORTER_STYLE=full

Values:

• collapsible (default): Wraps detailed test results in expandable HTML blocks
• full: Displays all test details directly

Equivalent to: --github-reporter-style

TUNIT_DISABLE_JUNIT_REPORTER

Disables the JUnit XML reporter.

export TUNIT_DISABLE_JUNIT_REPORTER=true

TUNIT_ENABLE_JUNIT_REPORTER

Explicitly enables the JUnit XML reporter.

export TUNIT_ENABLE_JUNIT_REPORTER=true

JUNIT_XML_OUTPUT_PATH

Sets the output path for JUnit XML reports.

export JUNIT_XML_OUTPUT_PATH=/path/to/output.xml

TUNIT_MAX_PARALLEL_TESTS

Sets the maximum number of tests that can run in parallel.

export TUNIT_MAX_PARALLEL_TESTS=4    # Limit to 4 concurrent tests
export TUNIT_MAX_PARALLEL_TESTS=0    # Unlimited parallelism

Equivalent to: --maximum-parallel-tests

Note: Command-line arguments take precedence over environment variables.

Microsoft Testing Platform Environment Variables

These environment variables are provided by the underlying Microsoft Testing Platform:

TESTINGPLATFORM_TELEMETRY_OPTOUT

Disables telemetry collection.

export TESTINGPLATFORM_TELEMETRY_OPTOUT=1

TESTINGPLATFORM_UI_LANGUAGE

Sets the language for platform messages and logs.

export TESTINGPLATFORM_UI_LANGUAGE=en-us

Platform-Level Flags

Some command-line flags are handled by the Microsoft Testing Platform rather than TUnit directly. These flags currently do not have environment variable equivalents:

• --no-progress - Disables progress reporting to screen
• --no-ansi - Disables ANSI escape characters

Workarounds for --no-progress

While there's no environment variable for --no-progress, you can use these alternatives:

1. MSBuild Property (with dotnet test):

<PropertyGroup>
  <TestingPlatformCommandLineArguments>--no-progress</TestingPlatformCommandLineArguments>
</PropertyGroup>

2. Shell Wrapper:

#!/bin/bash
# run-tests.sh
./MyTestProject.exe --no-progress "$@"

3. Direct Command Line:

./MyTestProject.exe --no-progress

CI/CD Examples

GitHub Actions

- name: Run Tests
  env:
    TUNIT_DISABLE_LOGO: true
    TUNIT_GITHUB_REPORTER_STYLE: collapsible
  run: dotnet test

Azure DevOps

- task: DotNetCoreCLI@2
  env:
    TUNIT_DISABLE_LOGO: true
  inputs:
    command: 'test'

GitLab CI

test:
  variables:
    TUNIT_DISABLE_LOGO: "true"
  script:
    - dotnet test

Docker

ENV TUNIT_DISABLE_LOGO=true
ENV TUNIT_MAX_PARALLEL_TESTS=4

Priority Order

When the same setting is configured in multiple places, TUnit follows this priority order (highest to lowest):

1. Command-line arguments - Always take precedence
2. Environment variables - Applied when command-line argument is not provided
3. Configuration files - Applied as defaults

Summary Table

Environment Variable	Equivalent Flag	Description
TUNIT_DISABLE_LOGO	--disable-logo	Disables ASCII art logo
TUNIT_GITHUB_REPORTER_STYLE	--github-reporter-style	GitHub reporter style
TUNIT_DISABLE_GITHUB_REPORTER	-	Disables GitHub reporter
TUNIT_DISABLE_JUNIT_REPORTER	-	Disables JUnit reporter
TUNIT_ENABLE_JUNIT_REPORTER	-	Enables JUnit reporter
JUNIT_XML_OUTPUT_PATH	-	JUnit output path
TUNIT_MAX_PARALLEL_TESTS	--maximum-parallel-tests	Max parallel tests