diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2e10af0..bf91dc1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         gemfile: [Gemfile, delayed.gemfile]
-        ruby-version: ['3.0', '3.1', '3.2']
+        ruby-version: ['3.2', '3.3', '3.4']
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
     steps:
diff --git a/README.md b/README.md
index fd2c230..6742e2f 100644
--- a/README.md
+++ b/README.md
@@ -179,5 +179,5 @@ jobs.
 ## License
 
 Delayed::Cron::Job is released under the terms of the MIT License.
-Copyright 2014-2023 Pascal Zumkehr. See [LICENSE](LICENSE) for further
+Copyright 2014-2025 Pascal Zumkehr. See [LICENSE](LICENSE) for further
 information.
diff --git a/delayed.gemfile b/delayed.gemfile
index fc4e6f6..a537916 100644
--- a/delayed.gemfile
+++ b/delayed.gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 
-gem "delayed", "~> 0.4.0"
+gem "delayed"
 
 gemspec
diff --git a/spec/delayed_cron_job_spec.rb b/spec/delayed_cron_job_spec.rb
index 3ac61ff..310f2c8 100644
--- a/spec/delayed_cron_job_spec.rb
+++ b/spec/delayed_cron_job_spec.rb
@@ -6,16 +6,6 @@ class TestJob
     def perform; end
   end
 
-  class DatabaseDisconnectPlugin < Delayed::Plugin
-
-    callbacks do |lifecycle|
-      lifecycle.after(:perform) do
-        ActiveRecord::Base.connection.disconnect!
-      end
-    end
-
-  end
-
   before { Delayed::Job.delete_all }
 
   let(:cron)    { '5 1 * * *' }
@@ -182,11 +172,25 @@ class DatabaseDisconnectPlugin < Delayed::Plugin
     end
 
     context 'when database connection is lost' do
+
+      class DatabaseDisconnectPlugin < Delayed::Plugin
+        callbacks do |lifecycle|
+          lifecycle.after(:perform) do
+
+            pp ActiveRecord::Base.connection_pool.connections
+            ActiveRecord::Base.connection.disconnect!
+          end
+        end
+      end
+
       around(:each) do |example|
         Delayed::Worker.plugins.unshift DatabaseDisconnectPlugin
         # hold onto a connection so the in-memory database isn't lost when disconnected
         temp_connection = ActiveRecord::Base.connection_pool.checkout
+        temp_connection.connect!
+
         example.run
+
         ActiveRecord::Base.connection_pool.checkin temp_connection
         Delayed::Worker.plugins.delete DatabaseDisconnectPlugin
       end