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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
Testing is software engineering

Skimping on tests doesn’t speed you up; it just leaves you flying blind.
Justin Toniazzo
December 15, 2025
- Testing
- Development
This week in #dev (Feb 21, 2025)

Highlights of what happened in our #dev channel on Slack this week.
thoughtbot
March 7, 2025
- This Week In Dev
- Ruby
- Tip
- Testing
Seeds...of Destruction! 🌱 ➡️ 💥

Untested seeds can grow into giant, crushing vines.
Louis Antonopoulos
March 5, 2025
- Ruby
- Rails
- Ruby On Rails
- Testing
- Development
This week in #dev (Jan 24, 2025)

Avoiding ReDoS attacks, using Active Resource in modern Rails, and how to improve flaky tests with Playwright.
thoughtbot
February 3, 2025
- This Week In Dev
- TIL
- Security
- Testing
- Rails
Things you might not need in your tests

Your test suite is slow and flaky because it does too much.
Matheus Richard
January 29, 2025
- Testing
- Performance
Testing SQL queries in a Ruby service

An epic journey of facing MSSQL and missing Rails.
Sally Hall
December 16, 2024
- SQL
- Testing
- Stories
- Ruby
- Web
Unlock the value of tests in understanding your codebase

Tests provide value beyond verifying behavior and catching bugs. Reading, writing, and interacting with tests empower developers to observe – and therefore gain knowledge about – their complex codebase.
Stephanie Minn
November 7, 2024
- Testing
- Learning
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