diff --git a/doc/development/testing_guide/best_practices.md b/doc/development/testing_guide/best_practices.md
index 448d9fd01c4..9d6792e9139 100644
--- a/doc/development/testing_guide/best_practices.md
+++ b/doc/development/testing_guide/best_practices.md
@@ -70,6 +70,7 @@ bundle exec rspec spec/[path]/[to]/[spec].rb
 - On `before` and `after` hooks, prefer it scoped to `:context` over `:all`
 - When using `evaluate_script("$('.js-foo').testSomething()")` (or `execute_script`) which acts on a given element,
   use a Capyabara matcher beforehand (e.g. `find('.js-foo')`) to ensure the element actually exists.
+- Use `focus: true` to isolate parts of the specs you want to run.
 
 [four-phase-test]: https://robots.thoughtbot.com/four-phase-test
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index bcc133790d1..bd504f1553b 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -48,6 +48,9 @@ Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }
 quality_level = Quality::TestLevel.new
 
 RSpec.configure do |config|
+  config.filter_run focus: true
+  config.run_all_when_everything_filtered = true
+
   config.use_transactional_fixtures = true
   config.use_instantiated_fixtures  = false
   config.fixture_path = Rails.root