---
title: "MSTest Best Practices (MSTest 3.x/4.x) - Air Market"
description: "MSTest has moved on, and tests written from memory often use older patterns. This gives you the best practices for MSTest unit testing, including the modern assertion APIs and tests driven by data. R…"
canonical: "https://airmarket.ai/app/csharp-mstest"
---

[Air Market](/) / [Developer Tools](/category/devtools) / MSTest Best Practices (MSTest 3.x/4.x)

Skill by [GitHub](/@github)

# MSTest Best Practices (MSTest 3.x/4.x)

Write MSTest the modern way, not the way you remember

## What this does

MSTest has moved on, and tests written from memory often use older patterns. This gives you the best practices for MSTest unit testing, including the modern assertion APIs and tests driven by data. Reach for it when writing or updating unit tests in MSTest.

### Top 3 things it does for you

- Check how MSTest unit tests should be written now
- Use the current assertion style instead of an older one
- Write tests that run over a set of inputs

## Information

**MSTest Best Practices (MSTest 3.x/4.x) at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [GitHub](/@github) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 14 KB |
| Licence | MIT |
| Repository | [github/awesome-copilot](https://github.com/github/awesome-copilot/tree/90921cc46f4e452ea379e70884d60ec25263f16a/skills/csharp-mstest) |
| GitHub stars | 38,187 (as of Nov 2026) |
| Installs | 8,872, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of MSTest Best Practices (MSTest 3.x/4.x) and recorded 0 findings and 2 flagged items. AIR's verdict: **safe**.

**What MSTest Best Practices (MSTest 3.x/4.x)'s check was run against**

|  |  |
| --- | --- |
| Commit | 90921cc46f4e452ea379e70884d60ec25263f16a |
| Content hash | 4e5b10509de7063a56a20a0748fb8523963d95e1cebc233103b88f9d64802c69 |
| Files read | [Browse the files at this exact commit](https://github.com/github/awesome-copilot/blob/90921cc46f4e452ea379e70884d60ec25263f16a/skills/csharp-mstest/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for MSTest Best Practices (MSTest 3.x/4.x)](/security/csharp-mstest)

## About MSTest Best Practices (MSTest 3.x/4.x)

This provides best practices for MSTest unit testing, covering versions 3.x and 4.x. That includes the modern assertion APIs and how to write data-driven tests.

Reach for it when you are writing MSTest tests, or updating ones that were written against older habits.

## What's inside

- SKILL.md - instructions

## Questions

### Is MSTest Best Practices (MSTest 3.x/4.x) safe to install?

AIR scanned this exact version of MSTest Best Practices (MSTest 3.x/4.x) and recorded 0 findings and 2 flagged items. AIR's verdict: safe. The verdict is named by the content that was read, at commit 90921cc46f4e, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/csharp-mstest.

### How do I install MSTest Best Practices (MSTest 3.x/4.x)?

Open https://airmarket.ai/app/csharp-mstest on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/github/awesome-copilot/tree/90921cc46f4e452ea379e70884d60ec25263f16a/skills/csharp-mstest. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by GitHub](/@github)

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Canonical URL: <https://airmarket.ai/app/csharp-mstest>