diff --git a/.rubocop.yml b/.rubocop.yml
index 17c7f88..8ce1aff 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -12,3 +12,7 @@ Discourse/Plugins/NoMonkeyPatching:
 Discourse/Plugins/NamespaceMethods:
   Exclude:
     - bin/prometheus_exporter
+
+Style/InvertibleUnlessCondition:
+  Exclude:
+    - '*.gemspec' 
diff --git a/prometheus_exporter.gemspec b/prometheus_exporter.gemspec
index dffec66..e1ee544 100644
--- a/prometheus_exporter.gemspec
+++ b/prometheus_exporter.gemspec
@@ -27,12 +27,12 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rubocop", ">= 0.69"
   spec.add_development_dependency "bundler", ">= 2.1.4"
   spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "minitest", "~> 5.15.0" # https://github.com/qrush/m/issues/93
+  spec.add_development_dependency "minitest", "~> 5.23.0"
   spec.add_development_dependency "guard", "~> 2.0"
-  spec.add_development_dependency "mini_racer", "~> 0.5.0"
+  spec.add_development_dependency "mini_racer", "~> 0.12.0"
   spec.add_development_dependency "guard-minitest", "~> 2.0"
   spec.add_development_dependency "oj", "~> 3.0"
-  spec.add_development_dependency "rack-test", "~> 0.8.3"
+  spec.add_development_dependency "rack-test", "~> 2.1.0"
   spec.add_development_dependency "minitest-stub-const", "~> 0.6"
   spec.add_development_dependency "rubocop-discourse", ">= 3"
   spec.add_development_dependency "appraisal", "~> 2.3"
diff --git a/test/middleware_test.rb b/test/middleware_test.rb
index 2d37714..c764cf5 100644
--- a/test/middleware_test.rb
+++ b/test/middleware_test.rb
@@ -133,7 +133,7 @@ def test_patch_called_with_prepend_instrument
     Object.stub_const(:Redis, Module) do
       ::Redis.stub_const(:Client) do
         mock = Minitest::Mock.new
-        mock.expect :call, nil, [Redis::Client, Array, :redis, { instrument: :prepend }]
+        mock.expect :call, nil, [Redis::Client, Array, :redis], instrument: :prepend
         ::PrometheusExporter::Instrumentation::MethodProfiler.stub(:patch, mock) do
           configure_middleware(instrument: :prepend)
         end
@@ -144,7 +144,7 @@ def test_patch_called_with_prepend_instrument
     Object.stub_const(:PG, Module) do
       ::PG.stub_const(:Connection) do
         mock = Minitest::Mock.new
-        mock.expect :call, nil, [PG::Connection, Array, :sql, { instrument: :prepend }]
+        mock.expect :call, nil, [PG::Connection, Array, :sql], instrument: :prepend
         ::PrometheusExporter::Instrumentation::MethodProfiler.stub(:patch, mock) do
           configure_middleware(instrument: :prepend)
         end
@@ -155,9 +155,9 @@ def test_patch_called_with_prepend_instrument
     Object.stub_const(:Mysql2, Module) do
       ::Mysql2.stub_consts({ Client: nil, Statement: nil, Result: nil }) do
         mock = Minitest::Mock.new
-        mock.expect :call, nil, [Mysql2::Client, Array, :sql, { instrument: :prepend }]
-        mock.expect :call, nil, [Mysql2::Statement, Array, :sql, { instrument: :prepend }]
-        mock.expect :call, nil, [Mysql2::Result, Array, :sql, { instrument: :prepend }]
+        mock.expect :call, nil, [Mysql2::Client, Array, :sql], instrument: :prepend
+        mock.expect :call, nil, [Mysql2::Statement, Array, :sql], instrument: :prepend
+        mock.expect :call, nil, [Mysql2::Result, Array, :sql], instrument: :prepend
         ::PrometheusExporter::Instrumentation::MethodProfiler.stub(:patch, mock) do
           configure_middleware(instrument: :prepend)
         end
@@ -172,7 +172,7 @@ def test_patch_called_with_alias_method_instrument
       ::Redis.stub_const(:VERSION, '4.0.4') do
         ::Redis.stub_const(:Client) do
           mock = Minitest::Mock.new
-          mock.expect :call, nil, [Redis::Client, Array, :redis, { instrument: :alias_method }]
+          mock.expect :call, nil, [Redis::Client, Array, :redis], instrument: :alias_method
           ::PrometheusExporter::Instrumentation::MethodProfiler.stub(:patch, mock) do
             configure_middleware
           end
@@ -184,7 +184,7 @@ def test_patch_called_with_alias_method_instrument
     Object.stub_const(:PG, Module) do
       ::PG.stub_const(:Connection) do
         mock = Minitest::Mock.new
-        mock.expect :call, nil, [PG::Connection, Array, :sql, { instrument: :alias_method }]
+        mock.expect :call, nil, [PG::Connection, Array, :sql], instrument: :alias_method
         ::PrometheusExporter::Instrumentation::MethodProfiler.stub(:patch, mock) do
           configure_middleware
         end
@@ -195,9 +195,9 @@ def test_patch_called_with_alias_method_instrument
     Object.stub_const(:Mysql2, Module) do
       ::Mysql2.stub_consts({ Client: nil, Statement: nil, Result: nil }) do
         mock = Minitest::Mock.new
-        mock.expect :call, nil, [Mysql2::Client, Array, :sql, { instrument: :alias_method }]
-        mock.expect :call, nil, [Mysql2::Statement, Array, :sql, { instrument: :alias_method }]
-        mock.expect :call, nil, [Mysql2::Result, Array, :sql, { instrument: :alias_method }]
+        mock.expect :call, nil, [Mysql2::Client, Array, :sql], instrument: :alias_method
+        mock.expect :call, nil, [Mysql2::Statement, Array, :sql], instrument: :alias_method
+        mock.expect :call, nil, [Mysql2::Result, Array, :sql], instrument: :alias_method
         ::PrometheusExporter::Instrumentation::MethodProfiler.stub(:patch, mock) do
           configure_middleware
         end
diff --git a/test/server/collector_test.rb b/test/server/collector_test.rb
index 1bfd52c..45dc4f7 100644
--- a/test/server/collector_test.rb
+++ b/test/server/collector_test.rb
@@ -360,7 +360,7 @@ def test_it_can_collect_sidekiq_metrics_with_custom_labels_from_worker_class
     queue = "default"
 
     client = Minitest::Mock.new
-    client.expect(:send_json, '', [{
+    client.expect(:send_json, '', [],
       type: "sidekiq",
       name: "PrometheusCollectorTest::#{worker_class}",
       queue: queue,
@@ -368,7 +368,7 @@ def test_it_can_collect_sidekiq_metrics_with_custom_labels_from_worker_class
       shutdown: false,
       duration: 0,
       custom_labels: WorkerWithCustomLabels.custom_labels
-    }])
+    )
 
     ::Process.stub(:clock_gettime, 1, ::Process::CLOCK_MONOTONIC) do
       instrument = PrometheusExporter::Instrumentation::Sidekiq.new(client: client)
@@ -386,7 +386,7 @@ def test_it_can_collect_sidekiq_metrics_with_custom_labels_from_job
     queue = "default"
 
     client = Minitest::Mock.new
-    client.expect(:send_json, '', [{
+    client.expect(:send_json, '', [],
       type: "sidekiq",
       name: "PrometheusCollectorTest::#{worker_class}",
       queue: queue,
@@ -394,7 +394,7 @@ def test_it_can_collect_sidekiq_metrics_with_custom_labels_from_job
       shutdown: false,
       duration: 0,
       custom_labels: { first_job_arg: 'arg_one' }
-    }])
+    )
 
     ::Process.stub(:clock_gettime, 1, ::Process::CLOCK_MONOTONIC) do
       instrument = PrometheusExporter::Instrumentation::Sidekiq.new(client: client)
@@ -416,12 +416,12 @@ def test_it_can_collect_sidekiq_metrics_on_job_death
     worker = Minitest::Mock.new
 
     client = Minitest::Mock.new
-    client.expect(:send_json, '', [{
+    client.expect(:send_json, '', [],
       type: "sidekiq",
       name: job["class"],
       dead: true,
       custom_labels: {}
-    }])
+    )
 
     Object.stub(:const_get, worker, [job['class']]) do
       PrometheusExporter::Client.stub(:default, client) do
@@ -444,12 +444,12 @@ def test_it_can_collect_sidekiq_metrics_on_job_death_for_delayed
     worker = Minitest::Mock.new
 
     client = Minitest::Mock.new
-    client.expect(:send_json, '', [{
+    client.expect(:send_json, '', [],
       type: "sidekiq",
       name: "DelayedAction#foo",
       dead: true,
       custom_labels: {}
-    }])
+    )
 
     Object.stub(:const_get, worker, [job['class']]) do
       PrometheusExporter::Client.stub(:default, client) do
@@ -469,12 +469,12 @@ def test_it_can_collect_sidekiq_metrics_on_job_death_with_custom_labels_from_wor
     }
 
     client = Minitest::Mock.new
-    client.expect(:send_json, '', [{
+    client.expect(:send_json, '', [],
       type: "sidekiq",
       name: job["class"],
       dead: true,
       custom_labels: WorkerWithCustomLabels.custom_labels
-    }])
+    )
 
     Object.stub(:const_get, WorkerWithCustomLabels, [job['class']]) do
       PrometheusExporter::Client.stub(:default, client) do
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 6eb72e0..027c65e 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -4,12 +4,12 @@
 require "prometheus_exporter"
 
 require "minitest/autorun"
-
+require "ostruct"
 require "redis"
 
 module TestingMod
   class FakeConnection
-    def call_pipelined(_, _)
+    def call_pipelined(_, _, _)
     end
 
     def call(_, _)