Is the Testcontainers for .NET skill free?

Yes. The skill itself is free from testcontainers/claude-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Testcontainers for .NET SkillProof Score?

7.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 5/10, docs & honesty 4/5.

How do I install Testcontainers for .NET?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Testcontainers for .NET with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Testcontainers for .NET

Integration tests in .NET against real Docker containers, on current 4.x APIs

by testcontainers · testcontainers/claude-skills

Works with setup

Install — copy the command Download source ↗

Test report

Verdict: Works with setup
Score: 7.6/10
Tested: Jul 30, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 30, 2026 · 76e6a76

⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Jul 30, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.

Nothing here could be compiled or run: this machine has no .NET SDK and no Docker or Podman, and Docker is a hard prerequisite for every example in the file, so the output score is left at no-measured-difference rather than guessed at. What I could check, I checked against the library's own source at version 4.13.0: every API the skill uses exists, the Ryuk image tag it names matches the one hardcoded in ResourceReaper.cs, and the constructor pattern it teaches is the one that is still current — the parameterless PostgreSqlBuilder() that most blog posts and a from-memory answer still reach for is marked [Obsolete] "will be removed" in the shipped code. Its own claim of 65+ modules is a shade high, with 64 module projects in the repository, and one Kafka example pins a different image than the library default. Install is clean from a bare HOME and the file is a genuinely well-organised reference, but you need Docker running before any of it does anything.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 5/10
Docs & honesty 4/5

What Testcontainers for .NET does

A reference for writing Testcontainers for .NET integration tests: module selection, builder configuration, wait strategies, container networking, volume and file mapping, cleanup via Ryuk, and worked xUnit, NUnit and MSTest examples for Postgres, Redis, SQL Server with EF Core, Kafka and multi-container stacks. Triggers when you need a real database or message queue in a .NET test instead of a mock, or when Testcontainers tests are flaky in CI.

How to install Testcontainers for .NET

Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.

Commands — how to trigger Testcontainers for .NET

/testcontainers-dotnet Integration tests in .NET against real Docker containers, on current 4.x APIs

It also activates on plain-language prompts like these:

Write an xUnit integration test against a real Postgres container in Docker
Our Testcontainers tests are flaky in CI, the container isn't ready in time
How do I share one SQL Server container across an xUnit test class?

Frequently asked questions

Is the Testcontainers for .NET skill free?: Yes. The skill itself is free from testcontainers/claude-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Testcontainers for .NET work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 30, 2026. Verdict: Works with setup. Nothing here could be compiled or run: this machine has no .NET SDK and no Docker or Podman, and Docker is a hard prerequisite for every example in the file, so the output score is left at no-measured-difference rather than guessed at. What I could check, I checked against the library's own source at version 4.13.0: every API the skill uses exists, the Ryuk image tag it names matches the one hardcoded in ResourceReaper.cs, and the constructor pattern it teaches is the one that is still current — the parameterless PostgreSqlBuilder() that most blog posts and a from-memory answer still reach for is marked [Obsolete] "will be removed" in the shipped code. Its own claim of 65+ modules is a shade high, with 64 module projects in the repository, and one Kafka example pins a different image than the library default. Install is clean from a bare HOME and the file is a genuinely well-organised reference, but you need Docker running before any of it does anything.
What is the Testcontainers for .NET SkillProof Score?: 7.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 5/10, docs & honesty 4/5.
How do I install Testcontainers for .NET?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Testcontainers for .NET with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.