diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e5f1dde..fa98800 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -86,13 +86,15 @@ jobs:
             gemfile: gemfiles/rails_8.1.gemfile
           - ruby: "3.1"
             gemfile: gemfiles/rails_8.1.gemfile
-          # NOTE: Rails edge requires Ruby version >= 3.2
+          # NOTE: Rails edge requires Ruby version >= 3.3.1
           - ruby: "2.7"
             gemfile: gemfiles/rails_edge.gemfile
           - ruby: "3.0"
             gemfile: gemfiles/rails_edge.gemfile
           - ruby: "3.1"
             gemfile: gemfiles/rails_edge.gemfile
+          - ruby: "3.2"
+            gemfile: gemfiles/rails_edge.gemfile
 
 
     env:
@@ -106,5 +108,20 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
 
-      - run: bundle exec rake
+      # Specs only. Linting is handled once by the `lint` job below: RuboCop
+      # resolves to a different version on each Ruby, so running it across the
+      # matrix makes lint results depend on the leg rather than on the code.
+      - run: bundle exec rake spec
+
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.4"
+          bundler-cache: true
+
       - run: bundle exec rubocop
diff --git a/.rubocop.yml b/.rubocop.yml
index 265ef77..1b59e00 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -12,13 +12,28 @@ Lint/AmbiguousBlockAssociation:
   Exclude:
     - spec/**/*_spec.rb
 
+# The no-op logger methods are intentionally empty. Configured here rather than
+# with an inline directive so the suppression is understood by every RuboCop
+# version in the CI matrix.
+Lint/EmptyBlock:
+  Exclude:
+    - lib/lograge/silent_logger.rb
+
 Metrics/AbcSize:
   Enabled: false
 
+# RuboCop excludes gemspecs from this cop by default, but a local Exclude
+# replaces the default list rather than extending it, so restate it here.
 Metrics/BlockLength:
   Exclude:
+    - '**/*.gemspec'
     - spec/**/*_spec.rb
 
+# Lograge's public API lives in a single module. See the note on Lint/EmptyBlock.
+Metrics/ModuleLength:
+  Exclude:
+    - lib/lograge.rb
+
 Style/BlockDelimiters:
   Enabled: false
 
diff --git a/lib/lograge.rb b/lib/lograge.rb
index 7e31653..0607942 100644
--- a/lib/lograge.rb
+++ b/lib/lograge.rb
@@ -22,7 +22,6 @@
 require 'active_support/core_ext/module/attribute_accessors'
 require 'active_support/core_ext/string/inflections'
 
-# rubocop:disable Metrics/ModuleLength
 module Lograge
   module_function
 
@@ -241,6 +240,5 @@ def notification_listeners_for(name)
     end
   end
 end
-# rubocop:enable Metrics/ModuleLength
 
 require 'lograge/railtie' if defined?(Rails)
diff --git a/lib/lograge/silent_logger.rb b/lib/lograge/silent_logger.rb
index 04c9055..41b1243 100644
--- a/lib/lograge/silent_logger.rb
+++ b/lib/lograge/silent_logger.rb
@@ -5,9 +5,7 @@
 module Lograge
   class SilentLogger < SimpleDelegator
     %i[debug info warn error fatal unknown].each do |method_name|
-      # rubocop:disable Lint/EmptyBlock
       define_method(method_name) { |*_args| }
-      # rubocop:enable Lint/EmptyBlock
     end
   end
 end
diff --git a/lograge.gemspec b/lograge.gemspec
index 2d439ea..b8f02e5 100644
--- a/lograge.gemspec
+++ b/lograge.gemspec
@@ -22,10 +22,11 @@ Gem::Specification.new do |s|
 
   s.files = `git ls-files lib LICENSE.txt`.split("\n")
 
-  # base64, bigdecimal and mutex_m were extracted from the default gems in
-  # Ruby 3.4; older Rails releases still `require` them, and JRuby (which
-  # targets Ruby 3.4) does not bundle them, so declare them explicitly.
+  # base64, benchmark, bigdecimal and mutex_m were extracted from the default
+  # gems in Ruby 3.4/4.1; older Rails releases still `require` them, and JRuby
+  # (which targets Ruby 3.4) does not bundle them, so declare them explicitly.
   s.add_development_dependency 'base64'
+  s.add_development_dependency 'benchmark'
   s.add_development_dependency 'bigdecimal'
   s.add_development_dependency 'mutex_m'
   # rdoc 8 depends on rbs, whose C extension cannot be built on JRuby. Keep
diff --git a/spec/log_subscribers/action_cable_spec.rb b/spec/log_subscribers/action_cable_spec.rb
index 0dfa385..28e3f0e 100644
--- a/spec/log_subscribers/action_cable_spec.rb
+++ b/spec/log_subscribers/action_cable_spec.rb
@@ -33,7 +33,7 @@
 
   context 'with custom_options configured for cee output' do
     before do
-      Lograge.formatter = ->(data) { "My test: #{data.to_json}" }
+      Lograge.formatter = ->(data) { "My test: #{JSON.dump(data)}" }
     end
 
     it 'combines the hash properly for the output' do
diff --git a/spec/log_subscribers/action_controller_spec.rb b/spec/log_subscribers/action_controller_spec.rb
index 35e60ec..5402927 100644
--- a/spec/log_subscribers/action_controller_spec.rb
+++ b/spec/log_subscribers/action_controller_spec.rb
@@ -39,7 +39,7 @@
 
   context 'with custom_options configured for cee output' do
     before do
-      Lograge.formatter = ->(data) { "My test: #{data.to_json}" }
+      Lograge.formatter = ->(data) { "My test: #{JSON.dump(data)}" }
     end
 
     it 'combines the hash properly for the output' do