diff --git a/Appraisals b/Appraisals
deleted file mode 100644
index cc719ac3..00000000
--- a/Appraisals
+++ /dev/null
@@ -1,17 +0,0 @@
-appraise 'rails_7_2' do
-  group :test do
-    gem 'activejob', '~> 7.2'
-  end
-end
-
-appraise 'rails_8_0' do
-  group :test do
-    gem 'activejob', '~> 8.0'
-  end
-end
-
-appraise 'rails_8_1' do
-  group :test do
-    gem 'activejob', '~> 8.1'
-  end
-end
diff --git a/README.md b/README.md
index 199f39a4..c3dae772 100644
--- a/README.md
+++ b/README.md
@@ -63,15 +63,10 @@ To run all unit specs against the latest dependency versions, execute
 bundle exec rake spec
 ```
 
-To run all Rails-related specs against all supported versions of Rails, execute
-
-```sh
-bundle exec appraisal rake spec:rails
-```
-
-To run integration specs, start a mock SQS server on `localhost:5000`. One such option is [cjlarose/moto-sqs-server](https://github.com/cjlarose/moto-sqs-server). Then execute
+To run integration specs (including Rails tests), start LocalStack and run:
 
 ```sh
+docker compose up -d
 bundle exec rake spec:integration
 ```