diff --git a/.drone.yml b/.drone.yml
index 6d03dc9..109dc1b 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -43,6 +43,14 @@ steps:
       RAILS_ENV: test
     <<: *spec_step_common
 
+  - name: Tests Ruby 2.4
+    environment:
+      COMPOSE_FILE_EXT: drone
+      DOCKER_RUBY_VERSION: 2.4
+      RUBY_IMAGE_TAG: 2.4-latest
+      RAILS_ENV: test
+    <<: *spec_step_common
+
   - name: release
     image: abakpress/gem-publication:latest
     pull: true
diff --git a/Appraisals b/Appraisals
index 96c60a6..e3ffef9 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,13 +1,15 @@
-appraise 'rails3.2' do
-  gem 'rails', '~> 3.2.0'
-end
+if RUBY_VERSION < '2.4'
+  appraise 'rails3.2' do
+    gem 'rails', '~> 3.2.0'
+  end
 
-appraise 'rails4.0' do
-  gem 'rails', '~> 4.0.13'
-end
+  appraise 'rails4.0' do
+    gem 'rails', '~> 4.0.13'
+  end
 
-appraise 'rails4.1' do
-  gem 'rails', '~> 4.1.16'
+  appraise 'rails4.1' do
+    gem 'rails', '~> 4.1.16'
+  end
 end
 
 appraise 'rails4.2' do