diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b4ab754..27d9994 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,15 +18,32 @@ jobs:
           --health-retries 5
         ports:
           # Maps port 6379 on service container to the host
-          - '6379:6379'
+          - "6379:6379"
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['3.0', '3.1', '3.2', '3.3']
-        gemfile: ['Gemfile', 'Gemfile.redis3', 'Gemfile.redis4']
+        ruby-version:
+          - "3.0"
+          - "3.1"
+          - "3.2"
+          - "3.3"
+        resque-version:
+          - "~> 1.23"
+        redis-version:
+          - "~> 3.3"
+          - "~> 4.8"
+        resque-scheduler-version:
+          - "4.3.0"
+          - "< 4.9.0"
+          - "~> 4.9"
+        exclude:
+          # resque-scheduler (= 4.3.0) depends on redis (~> 3.3)
+          - redis-version: "~> 4.8"
+            resque-scheduler-version: "4.3.0"
     env:
-      # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
-      BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}
+      REDIS_VERSION: "${{ matrix.redis-version }}"
+      RESQUE: "${{ matrix.resque-version }}"
+      RESQUE_SCHEDULER_VERSION: "${{ matrix.resque-scheduler-version }}"
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby-version }}
diff --git a/Gemfile b/Gemfile
index 851fabc..8c785c6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,38 @@
 source 'https://rubygems.org'
+
+case resque_version = ENV.fetch('RESQUE', 'latest')
+when 'master'
+  gem 'resque', git: 'https://github.com/resque/resque'
+when /^git:/, /^https:/
+  gem 'resque', git: resque_version
+when 'latest'
+  gem 'resque'
+else
+  gem 'resque', resque_version
+end
+
+case redis_version = ENV.fetch('REDIS_VERSION', 'latest')
+when 'master'
+  gem 'redis', git: 'https://github.com/redis/redis-rb'
+when /^git:/, /^https:/
+  gem 'redis', git: redis_version
+when 'latest'
+  gem 'redis'
+else
+  gem 'redis', redis_version
+end
+
+case resque_scheduler_version = ENV.fetch('RESQUE_SCHEDULER_VERSION', 'none')
+when 'master'
+  gem 'resque-scheduler', git: 'https://github.com/resque/resque-scheduler'
+when /^git:/, /^https:/
+  gem 'resque-scheduler', git: resque_scheduler_version
+when 'latest'
+  gem 'resque-scheduler'
+when 'none'
+  #noop
+else
+  gem 'resque-scheduler', resque_scheduler_version
+end
+
 gemspec
diff --git a/Gemfile.redis3 b/Gemfile.redis3
deleted file mode 100644
index 7283c0a..0000000
--- a/Gemfile.redis3
+++ /dev/null
@@ -1,5 +0,0 @@
-source 'https://rubygems.org'
-gemspec
-
-gem 'redis', '~> 3.3'
-gem 'redis-namespace', '~> 1.5.3'
diff --git a/Gemfile.redis4 b/Gemfile.redis4
deleted file mode 100644
index b19db31..0000000
--- a/Gemfile.redis4
+++ /dev/null
@@ -1,5 +0,0 @@
-source 'https://rubygems.org'
-gemspec
-
-gem 'redis', '~> 4.8'
-gem 'redis-namespace', '~> 1.9'
diff --git a/Rakefile b/Rakefile
index 4ae1bf4..ff27e6b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -10,6 +10,12 @@ Rake::TestTask.new(:test) do |task|
   task.verbose = true
 end
 
+desc "Run resque-scheduler integration tests."
+Rake::TestTask.new(:test_integration_resque_scheduler) do |task|
+  task.test_files = FileList["test/integration/resque-scheduler/*_test.rb"]
+  task.verbose = true
+end
+
 desc "Build Yardoc documentation."
 YARD::Rake::YardocTask.new :yardoc do |t|
   t.files = ["lib/**/*.rb"]
diff --git a/test/lock_test.rb b/test/lock_test.rb
index 1550188..a00188d 100644
--- a/test/lock_test.rb
+++ b/test/lock_test.rb
@@ -13,7 +13,7 @@ def test_resque_plugin_lint
   end
 
   def test_version
-    major, minor, _patch = Resque::Version.split(".")
+    major, minor, _patch = Resque::VERSION.split(".")
     assert_equal 1, major.to_i
     assert minor.to_i >= 7
   end