Re-run only failed tests through Rspec

In cases where large refactoring is taking place and there are multiple tests across multiple files failing, there’s an easy shortcut built into Rspec that allows you to re-run your specs but only the ones that failed.

The command ——————— rspec –only-failures

This allows for a tighter feedback loop to get failing tests green.

Setup ———- This functionality doesn’t come for free and some simple, but required, setup is necessary. Details about what’s required can be [found here.] (

The quick rundown is your Rspec configuration needs some extra flags set:

RSpec.configure do |c|
  c.example_status_persistence_file_path = "failing_specs.txt" 
  c.run_all_when_everything_filtered = true

This is required so Rspec will output any failing specs to a file and then read from it when --only-failures is specified.

Permanently using this, it’s also a great idea to add it to your .gitignore file.

Written on April 22, 2016 by jordanneville