migrate-nunit-to-mstest

migrate-nunit-to-mstest is a skill for Claude Code, Codex from managedcode/dotnet-skills. It costs 144 tokens per session (3,473 once invoked), scanned A, a copy of migrate-nunit-to-mstest, MIT.

A migration tool for changing .NET tests from NUnit to MSTest while keeping the existing target framework and test platform. NUnit and MSTest are two frameworks for writing and running automated tests.

In plain words
What is it for?
Use it to convert NUnit test projects, including parameterized tests, setup and teardown, categories, retries, timeouts, and test context usage, then build and verify them.
Why use it?
It handles framework-specific test attributes, assertions, setup methods, packages, and related behavior so the test suite can move without changing unrelated project settings.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to convert NUnit test projects, including parameterized tests, setup and teardown, categories, retries, timeouts, and test context usage, then build and verify them.

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Install with agentmods
npx agentmods add skills/managedcode/dotnet-skills/migrate-nunit-to-mstest
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add managedcode/dotnet-skills --skill migrate-nunit-to-mstest
Clone the repo
git clone --depth 1 https://github.com/managedcode/dotnet-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for migrate-nunit-to-mstest

README.md
[![agentmods](https://agentmods.dev/badge/skills/managedcode/dotnet-skills/migrate-nunit-to-mstest/github.svg)](https://agentmods.dev/skills/managedcode/dotnet-skills/migrate-nunit-to-mstest)
Your own site
<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/migrate-nunit-to-mstest"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/migrate-nunit-to-mstest/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for migrate-nunit-to-mstest

Your own site · 80×15
<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/migrate-nunit-to-mstest"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/migrate-nunit-to-mstest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 144 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,473 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00144 $0.03473
Opus 5.5 $0.00058 $0.01389
Sonnet 5.5 $0.00029 $0.00695
Haiku 4.5 $0.00014 $0.00347

Measured 1mo ago against content hash 8325e081033a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

migrate-nunit-to-mstest scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to migrate-nunit-to-mstest — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

catalog/Testing/Official-DotNet-Test-Migration/skills/migrate-nunit-to-mstest/SKILL.md · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NUnit -> MSTest Migration

Convert NUnit 3 or 4 tests to MSTest v4 without changing the target framework or test platform. A successful migration builds, discovers the same test cases, and preserves pass/fail, lifecycle, data, filtering, and concurrency semantics.

Scope

Use this skill only when the project contains NUnit packages or source and the user wants MSTest. If the project already uses MSTest and contains no NUnit tests, report that no framework migration is needed and make no changes.

Do not combine this framework conversion with a target-framework upgrade or VSTest/MTP migration. Complete and verify one migration before starting another.

Workspace Contract

  • Search the current working directory for projects and source; never look for user files under this skill's directory.
  • Classify the deliverable: "convert this project" means edit, build, and test; "give me a plan" means answer without editing.
  • Preserve the user's requested project scope. Shared props may be changed only when they own NUnit package or runner configuration for that scope.
  • The final response must state the source NUnit version, preserved runner, changed files, high-risk semantic mappings, and actual test counts.

Response Mode

  • Full migration request: inspect, edit, build, and run tests. Do not stop after a plan.
  • Focused compile error or API question: apply only the relevant mapping.
  • Unsupported target framework: stop before changing packages. MSTest v4 requires .NET 8+ or .NET Framework 4.6.2+ for test applications; offer a separately approved TFM upgrade or MSTest v3.

Decisions That Change the Result

Detected state Required action
No NUnit package, namespace, attribute, or constraint remains Stop, make no changes, and run the existing test command once to prove the already-MSTest project is healthy.
Source uses VSTest Preserve VSTest. Retain and update an explicit Microsoft.NET.Test.Sdk pin when the repository owns one; do not introduce MTP properties.
Source uses MTP Replace NUnit-specific MTP configuration with MSTest MTP configuration. Prefer MSTest.Sdk; with the metapackage set EnableMSTestRunner=true and OutputType=Exe.
NUnit uses its default fixture lifecycle NUnit normally shares one fixture instance across all test cases; MSTest creates a new class instance per test. Move state that must remain class-shared behind static fields initialized by [ClassInitialize], or prove the state is per-test before leaving it as an instance field.
NUnit has no Parallelizable configuration Preserve serial execution. Do not add [assembly: Parallelize]; NUnit and MSTest are both serial by default.
NUnit explicitly enables parallel execution Translate the effective scope and worker count. Never infer method-level parallelism from fixture-level settings.

Read the full file on GitHub · 194 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 194 lines · 144 tokens per session scan A 8325e081033a

Subscribe to this mod's changes

migrate-nunit-to-mstest is a skill published in the GitHub repository managedcode/dotnet-skills (492 stars, last pushed yesterday), licensed MIT. It adds 144 tokens to every session and 3,473 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to migrate-nunit-to-mstest, differing in 0 lines, and is treated as a copy.

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