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Announcing Shoulda Matchers 8.0: validate multiple attributes in one line

The latest Shoulda Matchers cuts repetitive validation specs down to a single line, runs on Ruby 4, and keeps up with the newest Rails.
Matheus Sales
June 23, 2026
- News
- Ruby
- Ruby On Rails
- Testing
- Open Source
- Shoulda
AI's "overnight" solution for our flaky tests took two weeks to adopt

We lived with flaky tests for years until Claude found a solution overnight. It only took two weeks to make the solution useful.
Fritz Meissner
June 22, 2026
The Playwright debugging tool Rails devs aren't using

Playwright records every test in cinematic detail. Most Rails devs aren’t watching.
Justin Toniazzo
June 19, 2026
- Rails
- Testing
- Capybara
- RSpec
- Debugging
- CI
Why Duck Typer?

Some say interface tests are fragile and shouldn’t be written. I disagree. Here’s why I think they’re worth writing.
Thiago Araújo Silva
May 26, 2026
- Ruby
- Testing
- Open Source
- Design
Meet Duck Typer: your new duck typing friend

Keep the beauty of duck typing with no annotations while still catching missing methods, mismatched signatures, and accidental drift across classes.
Thiago Araújo Silva
March 23, 2026
- RSpec
- Minitest
- Testing
- Ruby
- OOP
- Development
Introducing Test Budget: a linter for test performance

Your test suite didn’t get slow all at once. It won’t get fast all at once either. Start by making sure it stops getting worse.
Matheus Richard
March 17, 2026
Combine Capybara selectors to avoid the sequential timeout trap

How I shaved over a minute off a test suite with a one-line change.
Matheus Richard
March 6, 2026
What Shoulda Matchers Is Actually Doing For You

Rails model specs full of setup and error-message checks? There’s a reason so many teams replace them using shoulda-matchers. We’ll look at what those expectations are doing, how they make your tests more resilient to changes, and a lot less noisy.
Matheus Sales
January 23, 2026
- RSpec
- Rails
- Shoulda
- Ruby
- Testing
This week in #dev (Jan 9, 2026)

Overriding Rails credentials, a helper to submit forms with images and how to count tests with rspec’s –dry-run option.
thoughtbot
January 19, 2026
- This Week In Dev
- TIL
- Testing
- Rails
The Arrange/Act/Assert pattern

Organizing tests for readability.
Justin Toniazzo
December 16, 2025
- Testing
- Development
- Ruby
- Rails
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