diff --git a/.github/workflows/ruby-tests.yml b/.github/workflows/ruby-tests.yml
index cffac166..ba1de791 100644
--- a/.github/workflows/ruby-tests.yml
+++ b/.github/workflows/ruby-tests.yml
@@ -19,12 +19,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.7", "3.0", "3.1"]
+        ruby: ["3.2", "3.3"]
         gemfile:
           - Gemfile
-          - gemfiles/7_0.gemfile
+          - gemfiles/7_1.gemfile
           - gemfiles/6_1.gemfile
-          - gemfiles/6_0.gemfile
 
     steps:
       - uses: actions/checkout@v2.4.0
diff --git a/.rubocop.yml b/.rubocop.yml
index 81749dcf..13ca8f16 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -16,3 +16,6 @@ AllCops:
 
 Naming/VariableNumber:
   Enabled: false
+
+Minitest/EmptyLineBeforeAssertionMethods:
+  Enabled: false
diff --git a/browser.gemspec b/browser.gemspec
index d6a22491..d4821c62 100644
--- a/browser.gemspec
+++ b/browser.gemspec
@@ -7,27 +7,26 @@ Gem::Specification.new do |s|
   s.version               = Browser::VERSION
   s.platform              = Gem::Platform::RUBY
   s.authors               = ["Nando Vieira"]
-  s.email                 = ["fnando.vieira@gmail.com"]
+  s.email                 = ["me@fnando.com"]
   s.homepage              = "https://github.com/fnando/browser"
   s.summary               = "Do some browser detection with Ruby."
   s.description           = s.summary
   s.license               = "MIT"
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 3.2.0"
 
+  s.metadata["rubygems_mfa_required"] = "true"
   s.metadata["changelog_uri"] = "https://github.com/fnando/browser/blob/main/CHANGELOG.md"
 
   s.files         = `git ls-files`.split("\n")
-  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- exe/*`
                     .split("\n")
                     .map {|f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_development_dependency "bundler", ">= 0"
+  s.add_development_dependency "bundler"
   s.add_development_dependency "minitest"
   s.add_development_dependency "minitest-autotest"
   s.add_development_dependency "minitest-utils"
-  s.add_development_dependency "pry-meta"
   s.add_development_dependency "rack-test"
   s.add_development_dependency "rails"
   s.add_development_dependency "rake"
diff --git a/gemfiles/6_1.gemfile b/gemfiles/6_1.gemfile
deleted file mode 100644
index 8f0feace..00000000
--- a/gemfiles/6_1.gemfile
+++ /dev/null
@@ -1,6 +0,0 @@
-# frozen_string_literal: true
-
-source "https://rubygems.org"
-gemspec path: ".."
-
-gem "rails", "~> 6.1.0"
diff --git a/gemfiles/6_0.gemfile b/gemfiles/7_1.gemfile
similarity index 77%
rename from gemfiles/6_0.gemfile
rename to gemfiles/7_1.gemfile
index bda7e30a..b17e019b 100644
--- a/gemfiles/6_0.gemfile
+++ b/gemfiles/7_1.gemfile
@@ -3,4 +3,4 @@
 source "https://rubygems.org"
 gemspec path: ".."
 
-gem "rails", "~> 6.0.0"
+gem "rails", "~> 7.1.0"
diff --git a/lib/browser.rb b/lib/browser.rb
index bf811ac7..87aca635 100644
--- a/lib/browser.rb
+++ b/lib/browser.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 
 require_relative "browser/browser"
-require_relative "browser/rails" if defined?(::Rails)
+require_relative "browser/rails" if defined?(Rails)
diff --git a/lib/browser/base.rb b/lib/browser/base.rb
index 157689b5..4c974c93 100644
--- a/lib/browser/base.rb
+++ b/lib/browser/base.rb
@@ -270,7 +270,7 @@ def electron?(expected_version = nil)
 
     private def validate_size(subject, input)
       actual_bytesize = input.bytesize
-      size_limit = Browser.public_send("#{subject}_size_limit")
+      size_limit = Browser.public_send(:"#{subject}_size_limit")
 
       return if actual_bytesize < size_limit
 
diff --git a/test/browser_test.rb b/test/browser_test.rb
index 825dc0b7..9f89d58d 100644
--- a/test/browser_test.rb
+++ b/test/browser_test.rb
@@ -117,7 +117,7 @@ class BrowserTest < Minitest::Test
 
   test "returns empty language set for missing accept language" do
     browser = Browser.new("")
-    assert_equal [], browser.accept_language
+    assert_empty browser.accept_language
   end
 
   test "sets accept language while instantiating object" do
diff --git a/test/rails_test.rb b/test/rails_test.rb
index fadb9698..7237b005 100644
--- a/test/rails_test.rb
+++ b/test/rails_test.rb
@@ -26,7 +26,7 @@ def app
                           "HTTP_ACCEPT_LANGUAGE" => "en-US;q=0.8"
 
     assert_equal 200, last_response.status
-    assert_equal true, JSON.parse(last_response.body)["isBot"]
+    assert JSON.parse(last_response.body)["isBot"]
     assert_equal "en-US", JSON.parse(last_response.body)["acceptLanguages"][0]
   end
 end
diff --git a/test/unit/accept_language_test.rb b/test/unit/accept_language_test.rb
index e9bb6123..2586ba7b 100644
--- a/test/unit/accept_language_test.rb
+++ b/test/unit/accept_language_test.rb
@@ -161,6 +161,6 @@ def assert_language(item, expect = {})
   test "sets default quality value for invalid strings" do
     result = Browser::AcceptLanguage.parse(";q=0.0.0.0")
 
-    assert_equal 0.1, result[0].quality
+    assert_equal 0.1, result[0].quality # rubocop:disable Minitest/AssertInDelta
   end
 end
diff --git a/test/unit/facebook_test.rb b/test/unit/facebook_test.rb
index 033b0b1c..79590461 100644
--- a/test/unit/facebook_test.rb
+++ b/test/unit/facebook_test.rb
@@ -8,7 +8,7 @@ class FacebookTest < Minitest::Test
 
     assert_equal "Facebook", browser.name
     assert browser.facebook?
-    assert :facebook, browser.id
+    assert_equal :facebook, browser.id
     assert_equal "135.0.0.45.90", browser.full_version
     assert_equal "135", browser.version
   end
@@ -18,7 +18,7 @@ class FacebookTest < Minitest::Test
 
     assert_equal "Facebook", browser.name
     assert browser.facebook?
-    assert :facebook, browser.id
+    assert_equal :facebook, browser.id
     assert_equal "AppleWebKit/605.1.15", browser.full_version
     assert_equal "AppleWebKit/605", browser.version
   end
@@ -28,7 +28,7 @@ class FacebookTest < Minitest::Test
 
     assert_equal "Facebook", browser.name
     assert browser.facebook?
-    assert :facebook, browser.id
+    assert_equal :facebook, browser.id
     assert_equal "214.0.0.43.83", browser.full_version
     assert_equal "214", browser.version
   end
diff --git a/test/unit/instagram_test.rb b/test/unit/instagram_test.rb
index 8e8a4b0c..d9ae5ad0 100644
--- a/test/unit/instagram_test.rb
+++ b/test/unit/instagram_test.rb
@@ -8,7 +8,7 @@ class InstagramTest < Minitest::Test
 
     assert_equal "Instagram", browser.name
     assert browser.instagram?
-    assert :instagram, browser.id
+    assert_equal :instagram, browser.id
     assert_equal "41.0.0.14.90", browser.full_version
     assert_equal "41", browser.version
   end
@@ -18,7 +18,7 @@ class InstagramTest < Minitest::Test
 
     assert_equal "Instagram", browser.name
     assert browser.instagram?
-    assert :instagram, browser.id
+    assert_equal :instagram, browser.id
     assert_equal "182257141", browser.full_version
     assert_equal "182257141", browser.version
   end
diff --git a/test/unit/internet_explorer_test.rb b/test/unit/internet_explorer_test.rb
index 581178df..63be6a52 100644
--- a/test/unit/internet_explorer_test.rb
+++ b/test/unit/internet_explorer_test.rb
@@ -261,34 +261,34 @@ class IeTest < Minitest::Test
     browser = Browser.new(Browser["IE6"])
     meta = browser.meta
 
-    assert meta.include?("ie")
-    assert meta.include?("ie6")
-    assert meta.include?("oldie")
-    assert meta.include?("lt-ie8")
-    assert meta.include?("lt-ie9")
-    assert meta.include?("windows")
+    assert_includes meta, "ie"
+    assert_includes meta, "ie6"
+    assert_includes meta, "oldie"
+    assert_includes meta, "lt-ie8"
+    assert_includes meta, "lt-ie9"
+    assert_includes meta, "windows"
   end
 
   test "returns string representation for ie7" do
     browser = Browser.new(Browser["IE7"])
     meta = browser.meta
 
-    assert meta.include?("ie")
-    assert meta.include?("ie7")
-    assert meta.include?("oldie")
-    assert meta.include?("lt-ie8")
-    assert meta.include?("lt-ie9")
-    assert meta.include?("windows")
+    assert_includes meta, "ie"
+    assert_includes meta, "ie7"
+    assert_includes meta, "oldie"
+    assert_includes meta, "lt-ie8"
+    assert_includes meta, "lt-ie9"
+    assert_includes meta, "windows"
   end
 
   test "returns string representation for ie8" do
     browser = Browser.new(Browser["IE8"])
     meta = browser.meta
 
-    assert meta.include?("ie")
-    assert meta.include?("ie8")
-    assert meta.include?("lt-ie9")
-    assert meta.include?("windows")
+    assert_includes meta, "ie"
+    assert_includes meta, "ie8"
+    assert_includes meta, "lt-ie9"
+    assert_includes meta, "windows"
   end
 
   test "does not detect as two different versions" do
diff --git a/test/unit/ios_test.rb b/test/unit/ios_test.rb
index 5d555584..20a635b0 100644
--- a/test/unit/ios_test.rb
+++ b/test/unit/ios_test.rb
@@ -119,22 +119,22 @@ class IosTest < Minitest::Test
     browser = Browser.new(Browser["IPHONE"])
     meta = browser.to_s
 
-    assert meta.include?("webkit")
-    assert meta.include?("ios")
-    assert meta.include?("safari")
-    assert meta.include?("safari3")
-    assert meta.include?("mobile")
-    refute meta.include?("tablet")
+    assert_includes meta, "webkit"
+    assert_includes meta, "ios"
+    assert_includes meta, "safari"
+    assert_includes meta, "safari3"
+    assert_includes meta, "mobile"
+    refute_includes meta, "tablet"
   end
 
   test "returns string representation for ipad" do
     browser = Browser.new(Browser["IPAD"])
     meta = browser.to_s
 
-    assert meta.include?("webkit")
-    assert meta.include?("ios")
-    assert meta.include?("safari")
-    assert meta.include?("tablet")
-    refute meta.include?("mobile")
+    assert_includes meta, "webkit"
+    assert_includes meta, "ios"
+    assert_includes meta, "safari"
+    assert_includes meta, "tablet"
+    refute_includes meta, "mobile"
   end
 end
diff --git a/test/unit/meta_test.rb b/test/unit/meta_test.rb
index 0e44c5dd..a4349409 100644
--- a/test/unit/meta_test.rb
+++ b/test/unit/meta_test.rb
@@ -5,7 +5,7 @@
 class MetaTest < Minitest::Test
   class CustomRule < Browser::Meta::Base
     def meta
-      "custom" if /Custom/.match?(browser.ua)
+      "custom" if browser.ua.include?("Custom")
     end
   end
 
@@ -13,15 +13,15 @@ def meta
     Browser::Meta.rules.unshift(CustomRule)
 
     browser = Browser.new("Custom")
-    assert browser.meta.include?("custom")
+    assert_includes browser.meta, "custom"
 
     browser = Browser.new("Safari")
-    refute browser.meta.include?("custom")
+    refute_includes browser.meta, "custom"
 
     Browser::Meta.rules.shift
 
     browser = Browser.new("Custom")
-    refute browser.meta.include?("custom")
+    refute_includes browser.meta, "custom"
   end
 
   test "sets meta" do
@@ -33,25 +33,25 @@ def meta
     browser = Browser.new(Browser["CHROME"])
     meta = browser.to_s
 
-    assert meta.include?("chrome")
-    assert meta.include?("webkit")
-    assert meta.include?("mac")
+    assert_includes meta, "chrome"
+    assert_includes meta, "webkit"
+    assert_includes meta, "mac"
   end
 
   test "returns string representation for mobile" do
     browser = Browser.new(Browser["BLACKBERRY"])
     meta = browser.to_s
 
-    assert meta.include?("blackberry")
-    assert meta.include?("mobile")
+    assert_includes meta, "blackberry"
+    assert_includes meta, "mobile"
   end
 
   test "returns string representation for unknown platform/device/browser" do
     browser = Browser.new("Unknown")
     meta = browser.to_s
 
-    assert meta.include?("unknown_platform")
-    assert meta.include?("unknown_device")
-    assert meta.include?("unknown_browser")
+    assert_includes meta, "unknown_platform"
+    assert_includes meta, "unknown_device"
+    assert_includes meta, "unknown_browser"
   end
 end
diff --git a/test/unit/platform_test.rb b/test/unit/platform_test.rb
index b75605b6..32fa0a18 100644
--- a/test/unit/platform_test.rb
+++ b/test/unit/platform_test.rb
@@ -31,8 +31,8 @@ def id
   test "implements ==" do
     platform = Browser::Platform.new(Browser["IOS9"])
 
-    assert platform == :ios
-    refute platform == :android
+    assert_operator platform, :==, :ios # rubocop:disable Minitest/AssertEqual
+    refute_equal platform, :android
   end
 
   test "detects unknown platforms" do
diff --git a/test/unit/proxy_test.rb b/test/unit/proxy_test.rb
index afedaafc..c9e8d366 100644
--- a/test/unit/proxy_test.rb
+++ b/test/unit/proxy_test.rb
@@ -14,7 +14,7 @@ class ProxyTest < Minitest::Test
       browser = Browser.new(ua)
 
       assert browser.proxy?
-      assert browser.meta.include?("proxy")
+      assert_includes browser.meta, "proxy"
     end
   end
 end
diff --git a/test/unit/snapchat_test.rb b/test/unit/snapchat_test.rb
index 8fd5ef94..033c5451 100644
--- a/test/unit/snapchat_test.rb
+++ b/test/unit/snapchat_test.rb
@@ -8,7 +8,7 @@ class SnapchatTest < Minitest::Test
 
     assert_equal "Snapchat", browser.name
     assert browser.snapchat?
-    assert :snapchat, browser.id
+    assert_equal :snapchat, browser.id
     assert_equal "10.69.5.72", browser.full_version
     assert_equal "10", browser.version
   end
@@ -18,7 +18,7 @@ class SnapchatTest < Minitest::Test
 
     assert_equal "Snapchat", browser.name
     assert browser.snapchat?
-    assert :snapchat, browser.id
+    assert_equal :snapchat, browser.id
     assert_equal "10.70.0.0", browser.full_version
     assert_equal "10", browser.version
   end
@@ -28,7 +28,7 @@ class SnapchatTest < Minitest::Test
 
     assert_equal "Snapchat", browser.name
     assert browser.snapchat?
-    assert :snapchat, browser.id
+    assert_equal :snapchat, browser.id
     assert_equal "10.70.0.0", browser.full_version
     assert_equal "10", browser.version
   end
diff --git a/test/unit/uc_browser_test.rb b/test/unit/uc_browser_test.rb
index 3847808c..ddc3111c 100644
--- a/test/unit/uc_browser_test.rb
+++ b/test/unit/uc_browser_test.rb
@@ -6,7 +6,7 @@ class UcBrowserTest < Minitest::Test
   test "detects UC Browser" do
     browser = Browser.new(Browser["UC_BROWSER"])
     assert browser.uc_browser?
-    assert_equal browser.name, "UCBrowser"
+    assert_equal "UCBrowser", browser.name
   end
 
   test "detects version by range" do
diff --git a/test/unit/windows_test.rb b/test/unit/windows_test.rb
index 2e31551a..924d99bf 100644
--- a/test/unit/windows_test.rb
+++ b/test/unit/windows_test.rb
@@ -8,7 +8,7 @@ class WindowsTest < Minitest::Test
     assert browser.platform.windows_x64?
     refute browser.platform.windows_wow64?
     assert browser.platform.windows_x64_inclusive?
-    assert_equal browser.platform.version, "6.2"
+    assert_equal "6.2", browser.platform.version
   end
 
   test "detects windows wow64" do
@@ -16,14 +16,14 @@ class WindowsTest < Minitest::Test
     refute browser.platform.windows_x64?
     assert browser.platform.windows_wow64?
     assert browser.platform.windows_x64_inclusive?
-    assert_equal browser.platform.version, "6.3"
+    assert_equal "6.3", browser.platform.version
   end
 
   test "detects windows_2000" do
     browser = Browser.new(Browser["WINDOWS_2000"])
 
     assert browser.platform.windows?
-    assert_equal browser.platform.version, "5.0"
+    assert_equal "5.0", browser.platform.version
     assert browser.platform.windows?(["=5.0"])
   end
 
@@ -31,7 +31,7 @@ class WindowsTest < Minitest::Test
     browser = Browser.new(Browser["WINDOWS_2000_SP1"])
 
     assert browser.platform.windows?
-    assert_equal browser.platform.version, "5.01"
+    assert_equal "5.01", browser.platform.version
     assert browser.platform.windows?(["=5.01"])
   end
 
@@ -40,7 +40,7 @@ class WindowsTest < Minitest::Test
 
     assert browser.platform.windows?
     assert browser.platform.windows_xp?
-    assert_equal browser.platform.version, "5.1"
+    assert_equal "5.1", browser.platform.version
     assert browser.platform.windows?(["=5.1"])
   end
 
@@ -50,7 +50,7 @@ class WindowsTest < Minitest::Test
     assert browser.platform.windows?
     assert browser.platform.windows_xp?
     assert browser.platform.windows_x64?
-    assert_equal browser.platform.version, "5.2"
+    assert_equal "5.2", browser.platform.version
     assert browser.platform.windows?(["=5.2"])
   end
 
@@ -59,7 +59,7 @@ class WindowsTest < Minitest::Test
 
     assert browser.platform.windows?
     assert browser.platform.windows_vista?
-    assert_equal browser.platform.version, "6.0"
+    assert_equal "6.0", browser.platform.version
     assert browser.platform.windows?(["=6.0"])
   end
 
@@ -68,7 +68,7 @@ class WindowsTest < Minitest::Test
 
     assert browser.platform.windows?
     assert browser.platform.windows7?
-    assert_equal browser.platform.version, "6.1"
+    assert_equal "6.1", browser.platform.version
     assert browser.platform.windows?(["=6.1"])
   end
 
@@ -78,7 +78,7 @@ class WindowsTest < Minitest::Test
     assert browser.platform.windows?
     assert browser.platform.windows8?
     refute browser.platform.windows8_1?
-    assert_equal browser.platform.version, "6.2"
+    assert_equal "6.2", browser.platform.version
     assert browser.platform.windows?(["=6.2"])
   end
 
@@ -88,7 +88,7 @@ class WindowsTest < Minitest::Test
     assert browser.platform.windows?
     assert browser.platform.windows8?
     assert browser.platform.windows8_1?
-    assert_equal browser.platform.version, "6.3"
+    assert_equal "6.3", browser.platform.version
     assert browser.platform.windows?(["=6.3"])
   end
 
@@ -97,7 +97,7 @@ class WindowsTest < Minitest::Test
 
     assert browser.platform.windows?
     assert browser.platform.windows10?
-    assert_equal browser.platform.version, "10.0"
+    assert_equal "10.0", browser.platform.version
     assert browser.platform.windows?(["=10.0"])
   end