diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 3bc6d7a..5f8202a 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -6,17 +6,6 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: leading, trailing
-Layout/DotPosition:
-  Exclude:
-    - 'spec/finds_asset_paths_spec.rb'
-    - 'spec/helpers/inline_svg_spec.rb'
-    - 'spec/id_generator_spec.rb'
-    - 'spec/transformation_pipeline/transformations/aria_attributes_spec.rb'
-    - 'spec/transformation_pipeline/transformations/data_attributes_spec.rb'
-
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: IndentationWidth.
 # SupportedStyles: special_inside_parentheses, consistent, align_brackets
@@ -41,22 +30,6 @@ Layout/MultilineMethodCallIndentation:
     - 'spec/transformation_pipeline/transformations/style_attribute_spec.rb'
     - 'spec/transformation_pipeline/transformations/view_box_spec.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Lint/AmbiguousOperator:
-  Exclude:
-    - 'spec/io_resource_spec.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-Lint/LiteralInInterpolation:
-  Exclude:
-    - 'spec/inline_svg_spec.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AllowPercentLiteralArrayArgument.
-Lint/RedundantSplatExpansion:
-  Exclude:
-    - 'lib/inline_svg.rb'
-
 Lint/ShadowingOuterLocalVariable:
   Exclude:
     - 'lib/inline_svg/transform_pipeline/transformations/description.rb'
@@ -102,17 +75,6 @@ Performance/MapCompact:
   Exclude:
     - 'lib/inline_svg/transform_pipeline/transformations.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AutoCorrect.
-RSpec/BeEmpty:
-  Exclude:
-    - 'spec/transformation_pipeline/transformations_spec.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-RSpec/ContextMethod:
-  Exclude:
-    - 'spec/transformation_pipeline/transformations/transformation_spec.rb'
-
 # Configuration parameters: Prefixes, AllowedPatterns.
 # Prefixes: when, with, without
 RSpec/ContextWording:
@@ -121,7 +83,6 @@ RSpec/ContextWording:
     - 'spec/inline_svg_spec.rb'
     - 'spec/io_resource_spec.rb'
     - 'spec/transformation_pipeline/transformations/aria_attributes_spec.rb'
-    - 'spec/transformation_pipeline/transformations/transformation_spec.rb'
     - 'spec/transformation_pipeline/transformations_spec.rb'
 
 # This cop supports unsafe autocorrection (--autocorrect-all).
@@ -140,12 +101,6 @@ RSpec/EmptyExampleGroup:
 RSpec/ExampleLength:
   Max: 32
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: .
-# SupportedStyles: implicit, each, example
-RSpec/HookArgument:
-  EnforcedStyle: each
-
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: single_line_only, single_statement_only, disallow, require_implicit
@@ -153,11 +108,6 @@ RSpec/ImplicitSubject:
   Exclude:
     - 'spec/io_resource_spec.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-RSpec/MatchArray:
-  Exclude:
-    - 'spec/transformation_pipeline/transformations_spec.rb'
-
 # Configuration parameters: .
 # SupportedStyles: have_received, receive
 RSpec/MessageSpies:
@@ -176,14 +126,6 @@ RSpec/NamedSubject:
 RSpec/NestedGroups:
   Max: 4
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: not_to, to_not
-RSpec/NotToNot:
-  Exclude:
-    - 'spec/helpers/inline_svg_spec.rb'
-    - 'spec/io_resource_spec.rb'
-
 RSpec/RepeatedExampleGroupDescription:
   Exclude:
     - 'spec/helpers/inline_svg_spec.rb'
@@ -254,18 +196,6 @@ Style/CollectionCompact:
 Style/Documentation:
   Enabled: false
 
-# This cop supports safe autocorrection (--autocorrect).
-Style/EachWithObject:
-  Exclude:
-    - 'lib/inline_svg/transform_pipeline/transformations.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-Style/ExpandPathArguments:
-  Exclude:
-    - 'spec/cached_asset_file_spec.rb'
-    - 'spec/helpers/inline_svg_spec.rb'
-    - 'spec/io_resource_spec.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: always, always_true, never
@@ -277,15 +207,6 @@ Style/FrozenStringLiteralComment:
 Style/GuardClause:
   Exclude:
     - 'lib/inline_svg.rb'
-    - 'lib/inline_svg/action_view/helpers.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, EnforcedShorthandSyntax, UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
-# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
-# SupportedShorthandSyntax: always, never, either, consistent, either_consistent
-Style/HashSyntax:
-  Exclude:
-    - 'Rakefile'
 
 # This cop supports safe autocorrection (--autocorrect).
 Style/IfUnlessModifier:
@@ -294,12 +215,6 @@ Style/IfUnlessModifier:
     - 'lib/inline_svg/static_asset_finder.rb'
     - 'lib/inline_svg/transform_pipeline/transformations/aria_attributes.rb'
 
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: InverseMethods, InverseBlocks.
-Style/InverseMethods:
-  Exclude:
-    - 'lib/inline_svg/transform_pipeline/transformations.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 Style/MapIntoArray:
   Exclude:
@@ -313,19 +228,6 @@ Style/MutableConstant:
     - 'lib/inline_svg/asset_file.rb'
     - 'lib/inline_svg/version.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AllowedMethods.
-# AllowedMethods: be, be_a, be_an, be_between, be_falsey, be_kind_of, be_instance_of, be_truthy, be_within, eq, eql, end_with, include, match, raise_error, respond_to, start_with
-Style/NestedParenthesizedCalls:
-  Exclude:
-    - 'spec/io_resource_spec.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: IncludeSemanticChanges.
-Style/NonNilCheck:
-  Exclude:
-    - 'lib/inline_svg/transform_pipeline/transformations.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle, AllowedCompactTypes.
 # SupportedStyles: compact, exploded
@@ -341,24 +243,6 @@ Style/RedundantArgument:
   Exclude:
     - 'lib/inline_svg/transform_pipeline/transformations/class_attribute.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Style/RedundantBegin:
-  Exclude:
-    - 'lib/inline_svg.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-Style/RedundantConstantBase:
-  Exclude:
-    - 'spec/propshaft_asset_finder_spec.rb'
-    - 'spec/static_asset_finder_spec.rb'
-    - 'spec/webpack_asset_finder_spec.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AllowMultipleReturnValues.
-Style/RedundantReturn:
-  Exclude:
-    - 'lib/inline_svg/action_view/helpers.rb'
-
 # This cop supports safe autocorrection (--autocorrect).
 Style/RedundantSelf:
   Exclude:
@@ -372,13 +256,6 @@ Style/RedundantSelf:
     - 'lib/inline_svg/transform_pipeline/transformations/transformation.rb'
     - 'lib/inline_svg/transform_pipeline/transformations/width.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, AllowInnerSlashes.
-# SupportedStyles: slashes, percent_r, mixed
-Style/RegexpLiteral:
-  Exclude:
-    - 'spec/transformation_pipeline/transformations/transformation_spec.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: ConvertCodeThatCanStartToReturnNil, AllowedMethods, MaxChainLength.
 # AllowedMethods: present?, blank?, presence, try, try!
diff --git a/Rakefile b/Rakefile
index 88c85cf..0391f03 100644
--- a/Rakefile
+++ b/Rakefile
@@ -5,4 +5,4 @@ RSpec::Core::RakeTask.new(:spec) do |t|
   t.pattern = Dir.glob("spec/**/*_spec.rb")
   # t.rspec_opts = "--format documentation"
 end
-task :default => :spec
+task default: :spec
diff --git a/lib/inline_svg.rb b/lib/inline_svg.rb
index 7a76776..8ad5d44 100644
--- a/lib/inline_svg.rb
+++ b/lib/inline_svg.rb
@@ -30,16 +30,14 @@ def initialize
     end
 
     def asset_file=(custom_asset_file)
-      begin
-        method = custom_asset_file.method(:named)
-        if method.arity == 1
-          @asset_file = custom_asset_file
-        else
-          raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method with arity 1")
-        end
-      rescue NameError
-        raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method")
+      method = custom_asset_file.method(:named)
+      if method.arity == 1
+        @asset_file = custom_asset_file
+      else
+        raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method with arity 1")
       end
+    rescue NameError
+      raise InlineSvg::Configuration::Invalid.new("asset_file should implement the #named method")
     end
 
     def asset_finder=(finder)
@@ -67,7 +65,7 @@ def add_custom_transformation(options)
         raise InlineSvg::Configuration::Invalid.new("#{options.fetch(:transform)} should implement the .create_with_value and #transform methods")
       end
 
-      @custom_transformations.merge!(Hash[*[options.fetch(:attribute, :no_attribute), options]])
+      @custom_transformations.merge!(options.fetch(:attribute, :no_attribute) => options)
     end
 
     def raise_on_file_not_found=(value)
diff --git a/lib/inline_svg/action_view/helpers.rb b/lib/inline_svg/action_view/helpers.rb
index 957b6b0..8d945fe 100644
--- a/lib/inline_svg/action_view/helpers.rb
+++ b/lib/inline_svg/action_view/helpers.rb
@@ -54,9 +54,9 @@ def placeholder(filename)
         not_found_message = "'#{ERB::Util.html_escape_once(filename)}' #{extension_hint(filename)}"
 
         if css_class.nil?
-          return "<svg><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
+          "<svg><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
         else
-          return "<svg class='#{css_class}'><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
+          "<svg class='#{css_class}'><!-- SVG file not found: #{not_found_message}--></svg>".html_safe
         end
       end
 
diff --git a/lib/inline_svg/transform_pipeline/transformations.rb b/lib/inline_svg/transform_pipeline/transformations.rb
index 39558f7..0759e85 100644
--- a/lib/inline_svg/transform_pipeline/transformations.rb
+++ b/lib/inline_svg/transform_pipeline/transformations.rb
@@ -24,11 +24,10 @@ def self.custom_transformations
   end
 
   def self.magnify_priorities(transforms)
-    transforms.inject({}) do |output, (name, definition)|
+    transforms.each_with_object({}) do |(name, definition), output|
       priority = definition.fetch(:priority, built_in_transformations.size)
 
       output[name] = definition.merge({ priority: magnify(priority) })
-      output
     end
   end
 
@@ -65,7 +64,7 @@ def self.without_empty_values(params)
   def self.all_default_values
     custom_transformations
       .values
-      .select { |opt| opt[:default_value] != nil }
+      .reject { |opt| opt[:default_value].nil? }
       .map { |opt| [opt[:attribute], opt[:default_value]] }
       .inject({}) { |options, attrs| options.merge!(attrs[0] => attrs[1]) }
   end
diff --git a/spec/cached_asset_file_spec.rb b/spec/cached_asset_file_spec.rb
index e99dbe2..29c0284 100644
--- a/spec/cached_asset_file_spec.rb
+++ b/spec/cached_asset_file_spec.rb
@@ -4,7 +4,7 @@
 require "inline_svg"
 
 describe InlineSvg::CachedAssetFile do
-  let(:fixture_path) { Pathname.new(File.expand_path("../files/static_assets", __FILE__)) }
+  let(:fixture_path) { Pathname.new(File.expand_path('files/static_assets', __dir__)) }
 
   it "loads assets under configured paths" do
     known_document = File.read(fixture_path.join("assets0", "known-document.svg"))
diff --git a/spec/finds_asset_paths_spec.rb b/spec/finds_asset_paths_spec.rb
index 4354490..b68cefd 100644
--- a/spec/finds_asset_paths_spec.rb
+++ b/spec/finds_asset_paths_spec.rb
@@ -6,8 +6,8 @@
     it "returns fully qualified file paths from Sprockets" do
       sprockets = double('SprocketsDouble')
 
-      expect(sprockets).to receive(:find_asset).with('some-file').
-        and_return(double(pathname: Pathname('/full/path/to/some-file')))
+      expect(sprockets).to receive(:find_asset).with('some-file')
+                                               .and_return(double(pathname: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = sprockets
@@ -21,8 +21,8 @@
     it "returns fully qualified file paths from Sprockets" do
       sprockets = double('SprocketsDouble')
 
-      expect(sprockets).to receive(:find_asset).with('some-file').
-        and_return(double(filename: Pathname('/full/path/to/some-file')))
+      expect(sprockets).to receive(:find_asset).with('some-file')
+                                               .and_return(double(filename: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = sprockets
@@ -50,8 +50,8 @@
     it "returns fully qualified file paths from Propshaft" do
       propshaft = double('PropshaftDouble')
 
-      expect(propshaft).to receive(:find_asset).with('some-file').
-        and_return(double(pathname: Pathname('/full/path/to/some-file')))
+      expect(propshaft).to receive(:find_asset).with('some-file')
+                                               .and_return(double(pathname: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = propshaft
@@ -65,8 +65,8 @@
     it "returns the fully qualified file path" do
       shakapacker = double('ShakapackerDouble')
 
-      expect(shakapacker).to receive(:find_asset).with('some-file').
-        and_return(double(filename: Pathname('/full/path/to/some-file')))
+      expect(shakapacker).to receive(:find_asset).with('some-file')
+                                                 .and_return(double(filename: Pathname('/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = shakapacker
@@ -80,8 +80,8 @@
     it "returns the fully qualified file path" do
       shakapacker = double('ShakapackerDouble')
 
-      expect(shakapacker).to receive(:find_asset).with('some-file').
-        and_return(double(filename: Pathname('https://my-fancy-domain.test/full/path/to/some-file')))
+      expect(shakapacker).to receive(:find_asset).with('some-file')
+                                                 .and_return(double(filename: Pathname('https://my-fancy-domain.test/full/path/to/some-file')))
 
       InlineSvg.configure do |config|
         config.asset_finder = shakapacker
diff --git a/spec/helpers/inline_svg_spec.rb b/spec/helpers/inline_svg_spec.rb
index 1626bf7..f67945d 100644
--- a/spec/helpers/inline_svg_spec.rb
+++ b/spec/helpers/inline_svg_spec.rb
@@ -14,7 +14,7 @@ def transform(doc)
 
   shared_examples "inline_svg helper" do |helper_method:|
     context "when passed the name of an SVG that does not exist" do
-      after(:each) do
+      after do
         InlineSvg.reset_configuration!
       end
 
@@ -24,9 +24,9 @@ def transform(doc)
             config.raise_on_file_not_found = true
           end
 
-          allow(InlineSvg::AssetFile).to receive(:named).
-            with('some-missing-file.svg').
-            and_raise(InlineSvg::AssetFile::FileNotFound.new)
+          allow(InlineSvg::AssetFile).to receive(:named)
+            .with('some-missing-file.svg')
+            .and_raise(InlineSvg::AssetFile::FileNotFound.new)
 
           expect {
             helper.send(helper_method, 'some-missing-file.svg')
@@ -35,9 +35,9 @@ def transform(doc)
       end
 
       it "returns an empty, html safe, SVG document as a placeholder" do
-        allow(InlineSvg::AssetFile).to receive(:named).
-          with('some-missing-file.svg').
-          and_raise(InlineSvg::AssetFile::FileNotFound.new)
+        allow(InlineSvg::AssetFile).to receive(:named)
+          .with('some-missing-file.svg')
+          .and_raise(InlineSvg::AssetFile::FileNotFound.new)
 
         output = helper.send(helper_method, 'some-missing-file.svg')
         expect(output).to eq "<svg><!-- SVG file not found: 'some-missing-file.svg' --></svg>"
@@ -46,9 +46,9 @@ def transform(doc)
 
       it "escapes malicious input" do
         malicious = "--></svg><script>alert(1)</script><svg>.svg"
-        allow(InlineSvg::AssetFile).to receive(:named).
-          with(malicious).
-          and_raise(InlineSvg::AssetFile::FileNotFound.new)
+        allow(InlineSvg::AssetFile).to receive(:named)
+          .with(malicious)
+          .and_raise(InlineSvg::AssetFile::FileNotFound.new)
 
         output = helper.send(helper_method, malicious)
         expect(output).to eq "<svg><!-- SVG file not found: '--&gt;&lt;/svg&gt;&lt;script&gt;alert(1)&lt;/script&gt;&lt;svg&gt;.svg' --></svg>"
@@ -56,9 +56,9 @@ def transform(doc)
       end
 
       it "gives a helpful hint when no .svg extension is provided in the filename" do
-        allow(InlineSvg::AssetFile).to receive(:named).
-          with('missing-file-with-no-extension').
-          and_raise(InlineSvg::AssetFile::FileNotFound.new)
+        allow(InlineSvg::AssetFile).to receive(:named)
+          .with('missing-file-with-no-extension')
+          .and_raise(InlineSvg::AssetFile::FileNotFound.new)
 
         output = helper.send(helper_method, 'missing-file-with-no-extension')
         expect(output).to eq "<svg><!-- SVG file not found: 'missing-file-with-no-extension' (Try adding .svg to your filename) --></svg>"
@@ -69,9 +69,9 @@ def transform(doc)
           config.svg_not_found_css_class = 'missing-svg'
         end
 
-        allow(InlineSvg::AssetFile).to receive(:named).
-          with('some-other-missing-file.svg').
-          and_raise(InlineSvg::AssetFile::FileNotFound.new)
+        allow(InlineSvg::AssetFile).to receive(:named)
+          .with('some-other-missing-file.svg')
+          .and_raise(InlineSvg::AssetFile::FileNotFound.new)
 
         output = helper.send(helper_method, 'some-other-missing-file.svg')
         expect(output).to eq "<svg class='missing-svg'><!-- SVG file not found: 'some-other-missing-file.svg' --></svg>"
@@ -80,9 +80,9 @@ def transform(doc)
 
       context "and a fallback that does exist" do
         it "displays the fallback" do
-          allow(InlineSvg::AssetFile).to receive(:named).
-            with('missing.svg').
-            and_raise(InlineSvg::AssetFile::FileNotFound.new)
+          allow(InlineSvg::AssetFile).to receive(:named)
+            .with('missing.svg')
+            .and_raise(InlineSvg::AssetFile::FileNotFound.new)
 
           fallback_file = '<svg xmlns="http://www.w3.org/2000/svg" xml:lang="en"><!-- This is a comment --></svg>'
           allow(InlineSvg::AssetFile).to receive(:named).with('fallback.svg').and_return(fallback_file)
@@ -146,13 +146,13 @@ def transform(doc)
       end
 
       context "with custom transformations" do
-        before(:each) do
+        before do
           InlineSvg.configure do |config|
             config.add_custom_transformation({ attribute: :custom, transform: WorkingCustomTransform })
           end
         end
 
-        after(:each) do
+        after do
           InlineSvg.reset_configuration!
         end
 
@@ -165,13 +165,13 @@ def transform(doc)
       end
 
       context "with custom transformations using a default value" do
-        before(:each) do
+        before do
           InlineSvg.configure do |config|
             config.add_custom_transformation({ attribute: :custom, transform: WorkingCustomTransform, default_value: 'default value' })
           end
         end
 
-        after(:each) do
+        after do
           InlineSvg.reset_configuration!
         end
 
@@ -203,13 +203,13 @@ def transform(doc)
       it 'accept IO' do
         expect(InlineSvg::IOResource).to receive(:===).with(argument).and_return(true)
         expect(InlineSvg::IOResource).to receive(:read).with(argument)
-        expect(InlineSvg::AssetFile).to_not receive(:named)
+        expect(InlineSvg::AssetFile).not_to receive(:named)
         helper.send(helper_method, argument)
       end
 
       it 'accept filename' do
         expect(InlineSvg::IOResource).to receive(:===).with(argument).and_return(false)
-        expect(InlineSvg::IOResource).to_not receive(:read)
+        expect(InlineSvg::IOResource).not_to receive(:read)
         expect(InlineSvg::AssetFile).to receive(:named).with(argument)
         helper.send(helper_method, argument)
       end
@@ -217,7 +217,7 @@ def transform(doc)
 
     context 'when passed IO object argument' do
       let(:io_object) { double('io_object') }
-      let(:file_path) { File.expand_path('../../files/example.svg', __FILE__) }
+      let(:file_path) { File.expand_path('../files/example.svg', __dir__) }
       let(:answer) { File.read(file_path) }
 
       it 'return valid svg' do
diff --git a/spec/id_generator_spec.rb b/spec/id_generator_spec.rb
index f69f085..6543824 100644
--- a/spec/id_generator_spec.rb
+++ b/spec/id_generator_spec.rb
@@ -4,7 +4,7 @@
   it "generates a hexencoded ID based on a salt and a random value" do
     randomizer = -> { "some-random-value" }
 
-    expect(InlineSvg::IdGenerator.generate("some-base", "some-salt", randomness: randomizer)).
-      to eq("at2c17mkqnvopy36iccxspura7wnreqf")
+    expect(InlineSvg::IdGenerator.generate("some-base", "some-salt", randomness: randomizer))
+      .to eq("at2c17mkqnvopy36iccxspura7wnreqf")
   end
 end
diff --git a/spec/inline_svg_spec.rb b/spec/inline_svg_spec.rb
index 6821be6..63a7c79 100644
--- a/spec/inline_svg_spec.rb
+++ b/spec/inline_svg_spec.rb
@@ -120,7 +120,7 @@ def self.named(filename); end
           InlineSvg.configure do |config|
             config.add_custom_transformation(attribute: :irrelevant, transform: :not_a_class)
           end
-        end.to raise_error(InlineSvg::Configuration::Invalid, /#{:not_a_class} should implement the .create_with_value and #transform methods/)
+        end.to raise_error(InlineSvg::Configuration::Invalid, /not_a_class should implement the .create_with_value and #transform methods/)
       end
     end
   end
diff --git a/spec/io_resource_spec.rb b/spec/io_resource_spec.rb
index d0be2e5..2825981 100644
--- a/spec/io_resource_spec.rb
+++ b/spec/io_resource_spec.rb
@@ -42,12 +42,12 @@
 
       it "empty" do
         rio.read
-        expect(subject.read rio).to eq ''
+        expect(subject.read(rio)).to eq ''
       end
 
       it "twice" do
-        expect(subject.read rio).to eq answer
-        expect(subject.read rio).to eq answer
+        expect(subject.read(rio)).to eq answer
+        expect(subject.read(rio)).to eq answer
       end
 
       it "write only raise error" do
@@ -62,18 +62,18 @@
       let(:rio) { StringIO.new(answer, 'r') }
       let(:wio) { StringIO.new('write', 'w') }
 
-      instance_exec &tests
+      instance_exec(&tests)
     end
 
     context 'File object' do
-      let(:file_path) { File.expand_path('../files/example.svg', __FILE__) }
+      let(:file_path) { File.expand_path('files/example.svg', __dir__) }
       let(:answer) { File.read(file_path) }
       let(:rio) { File.new(file_path, 'r') }
       let(:wio) { File.new('/dev/null', 'w') }
 
-      instance_exec &tests
+      instance_exec(&tests)
       it 'has non empty body' do
-        expect(answer).to_not eq ''
+        expect(answer).not_to eq ''
       end
     end
   end
diff --git a/spec/propshaft_asset_finder_spec.rb b/spec/propshaft_asset_finder_spec.rb
index 81c46c0..6d8c2bc 100644
--- a/spec/propshaft_asset_finder_spec.rb
+++ b/spec/propshaft_asset_finder_spec.rb
@@ -4,7 +4,7 @@
   context "when the file is not found" do
     it "returns nil" do
       stub_const('Rails', double('Rails').as_null_object)
-      expect(::Rails.application.assets.load_path).to receive(:find).with('some-file').and_return(nil)
+      expect(Rails.application.assets.load_path).to receive(:find).with('some-file').and_return(nil)
 
       expect(InlineSvg::PropshaftAssetFinder.find_asset('some-file').pathname).to be_nil
     end
@@ -15,7 +15,7 @@
       stub_const('Rails', double('Rails').as_null_object)
       asset = double('Asset')
       expect(asset).to receive(:path).and_return(Pathname.new('/full/path/to/some-file'))
-      expect(::Rails.application.assets.load_path).to receive(:find).with('some-file').and_return(asset)
+      expect(Rails.application.assets.load_path).to receive(:find).with('some-file').and_return(asset)
 
       expect(InlineSvg::PropshaftAssetFinder.find_asset('some-file').pathname).to eq Pathname('/full/path/to/some-file')
     end
diff --git a/spec/static_asset_finder_spec.rb b/spec/static_asset_finder_spec.rb
index 4bb14be..e4c16e5 100644
--- a/spec/static_asset_finder_spec.rb
+++ b/spec/static_asset_finder_spec.rb
@@ -4,7 +4,7 @@
   context "when the file is not found" do
     it "returns nil" do
       stub_const('Rails', double('Rails').as_null_object)
-      expect(::Rails.application.config.assets).to receive(:compile).and_return(true)
+      expect(Rails.application.config.assets).to receive(:compile).and_return(true)
 
       expect(described_class.find_asset('some-file').pathname).to be_nil
     end
@@ -13,11 +13,11 @@
   context "when the file is found" do
     it "returns fully qualified file path from Sprockets" do
       stub_const('Rails', double('Rails').as_null_object)
-      expect(::Rails.application.config.assets).to receive(:compile).and_return(true)
+      expect(Rails.application.config.assets).to receive(:compile).and_return(true)
       pathname = Pathname.new('/full/path/to/some-file')
       asset = double('Asset')
       expect(asset).to receive(:filename).and_return(pathname)
-      expect(::Rails.application.assets).to receive(:[]).with('some-file').and_return(asset)
+      expect(Rails.application.assets).to receive(:[]).with('some-file').and_return(asset)
 
       expect(described_class.find_asset('some-file').pathname).to eq(pathname)
     end
diff --git a/spec/transformation_pipeline/transformations/aria_attributes_spec.rb b/spec/transformation_pipeline/transformations/aria_attributes_spec.rb
index 65a452a..003eb26 100644
--- a/spec/transformation_pipeline/transformations/aria_attributes_spec.rb
+++ b/spec/transformation_pipeline/transformations/aria_attributes_spec.rb
@@ -15,8 +15,8 @@
       document = Nokogiri::XML::Document.parse("<svg><title>Some title</title>Some document</svg>")
       transformation = InlineSvg::TransformPipeline::Transformations::AriaAttributes.create_with_value(true)
 
-      expect(InlineSvg::IdGenerator).to receive(:generate).with("title", "Some title").
-        and_return("some-id")
+      expect(InlineSvg::IdGenerator).to receive(:generate).with("title", "Some title")
+                                                          .and_return("some-id")
 
       expect(transformation.transform(document).to_html).to eq(
         "<svg role=\"img\" aria-labelledby=\"some-id\"><title id=\"some-id\">Some title</title>Some document</svg>\n"
@@ -27,8 +27,8 @@
       document = Nokogiri::XML::Document.parse("<svg><desc>Some description</desc>Some document</svg>")
       transformation = InlineSvg::TransformPipeline::Transformations::AriaAttributes.create_with_value(true)
 
-      expect(InlineSvg::IdGenerator).to receive(:generate).with("desc", "Some description").
-        and_return("some-id")
+      expect(InlineSvg::IdGenerator).to receive(:generate).with("desc", "Some description")
+                                                          .and_return("some-id")
 
       expect(transformation.transform(document).to_html).to eq(
         "<svg role=\"img\" aria-labelledby=\"some-id\"><desc id=\"some-id\">Some description</desc>Some document</svg>\n"
@@ -39,10 +39,10 @@
       document = Nokogiri::XML::Document.parse("<svg><title>Some title</title><desc>Some description</desc>Some document</svg>")
       transformation = InlineSvg::TransformPipeline::Transformations::AriaAttributes.create_with_value(true)
 
-      expect(InlineSvg::IdGenerator).to receive(:generate).with("title", "Some title").
-        and_return("some-id")
-      expect(InlineSvg::IdGenerator).to receive(:generate).with("desc", "Some description").
-        and_return("some-other-id")
+      expect(InlineSvg::IdGenerator).to receive(:generate).with("title", "Some title")
+                                                          .and_return("some-id")
+      expect(InlineSvg::IdGenerator).to receive(:generate).with("desc", "Some description")
+                                                          .and_return("some-other-id")
 
       expect(transformation.transform(document).to_html).to eq(
         "<svg role=\"img\" aria-labelledby=\"some-id some-other-id\"><title id=\"some-id\">Some title</title>\n<desc id=\"some-other-id\">Some description</desc>Some document</svg>\n"
@@ -53,10 +53,10 @@
       document = Nokogiri::XML::Document.parse("<svg><title id='my-title'>Some title</title><desc id='my-desc'>Some description</desc>Some document</svg>")
       transformation = InlineSvg::TransformPipeline::Transformations::AriaAttributes.create_with_value(true)
 
-      expect(InlineSvg::IdGenerator).to receive(:generate).with("my-title", "Some title").
-        and_return("some-id")
-      expect(InlineSvg::IdGenerator).to receive(:generate).with("my-desc", "Some description").
-        and_return("some-other-id")
+      expect(InlineSvg::IdGenerator).to receive(:generate).with("my-title", "Some title")
+                                                          .and_return("some-id")
+      expect(InlineSvg::IdGenerator).to receive(:generate).with("my-desc", "Some description")
+                                                          .and_return("some-other-id")
 
       expect(transformation.transform(document).to_html).to eq(
         "<svg role=\"img\" aria-labelledby=\"some-id some-other-id\"><title id=\"some-id\">Some title</title>\n<desc id=\"some-other-id\">Some description</desc>Some document</svg>\n"
diff --git a/spec/transformation_pipeline/transformations/data_attributes_spec.rb b/spec/transformation_pipeline/transformations/data_attributes_spec.rb
index 89f5fd5..09f0f82 100644
--- a/spec/transformation_pipeline/transformations/data_attributes_spec.rb
+++ b/spec/transformation_pipeline/transformations/data_attributes_spec.rb
@@ -31,8 +31,8 @@
   context "when multiple data attributes are supplied" do
     it "adds data attributes to the SVG for each supplied value" do
       document = Nokogiri::XML::Document.parse('<svg>Some document</svg>')
-      transformation = InlineSvg::TransformPipeline::Transformations::DataAttributes.
-        create_with_value({ some: "value", other: "thing" })
+      transformation = InlineSvg::TransformPipeline::Transformations::DataAttributes
+        .create_with_value({ some: "value", other: "thing" })
 
       expect(transformation.transform(document).to_html).to eq(
         "<svg data-some=\"value\" data-other=\"thing\">Some document</svg>\n"
@@ -43,8 +43,8 @@
   context "when a non-hash is supplied" do
     it "does not update the SVG document" do
       document = Nokogiri::XML::Document.parse('<svg>Some document</svg>')
-      transformation = InlineSvg::TransformPipeline::Transformations::DataAttributes.
-        create_with_value("some non-hash")
+      transformation = InlineSvg::TransformPipeline::Transformations::DataAttributes
+        .create_with_value("some non-hash")
 
       expect(transformation.transform(document).to_html).to eq(
         "<svg>Some document</svg>\n"
diff --git a/spec/transformation_pipeline/transformations/transformation_spec.rb b/spec/transformation_pipeline/transformations/transformation_spec.rb
index 1dcc364..3e4580f 100644
--- a/spec/transformation_pipeline/transformations/transformation_spec.rb
+++ b/spec/transformation_pipeline/transformations/transformation_spec.rb
@@ -2,7 +2,7 @@
 require 'inline_svg/transform_pipeline'
 
 describe InlineSvg::TransformPipeline::Transformations::Transformation do
-  context "#with_svg" do
+  describe "#with_svg" do
     it "returns a Nokogiri::XML::Document representing the parsed document fragment" do
       document = Nokogiri::XML::Document.parse("<svg>Some document</svg>")
 
@@ -23,7 +23,7 @@
         returned_document = transformation.with_svg(document, &b)
       end.to yield_control
 
-      expect(returned_document.to_s).to match(/<svg>Some document<\/svg>/)
+      expect(returned_document.to_s).to match(%r{<svg>Some document</svg>})
     end
 
     it "does not yield if the document does not contain an SVG element at the root" do
diff --git a/spec/transformation_pipeline/transformations_spec.rb b/spec/transformation_pipeline/transformations_spec.rb
index 038bd46..a64ef09 100644
--- a/spec/transformation_pipeline/transformations_spec.rb
+++ b/spec/transformation_pipeline/transformations_spec.rb
@@ -29,7 +29,7 @@ class ASecondCustomTransform < ACustomTransform; end
         aria_hidden: "true"
       )
 
-      expect(transformations.map(&:class)).to match_array([
+      expect(transformations.map(&:class)).to contain_exactly(
         InlineSvg::TransformPipeline::Transformations::NoComment,
         InlineSvg::TransformPipeline::Transformations::ClassAttribute,
         InlineSvg::TransformPipeline::Transformations::StyleAttribute,
@@ -44,7 +44,7 @@ class ASecondCustomTransform < ACustomTransform; end
         InlineSvg::TransformPipeline::Transformations::PreserveAspectRatio,
         InlineSvg::TransformPipeline::Transformations::AriaAttributes,
         InlineSvg::TransformPipeline::Transformations::AriaHiddenAttribute
-      ])
+      )
     end
 
     it "returns transformations in priority order" do
@@ -78,7 +78,7 @@ class ASecondCustomTransform < ACustomTransform; end
         not_a_real_transform: 'irrelevant'
       )
 
-      expect(transformations.map(&:class)).to match_array([])
+      expect(transformations.map(&:class)).to be_empty
     end
 
     it "does not return a transformation when a value is not supplied" do
@@ -86,19 +86,19 @@ class ASecondCustomTransform < ACustomTransform; end
         title: nil
       )
 
-      expect(transformations.map(&:class)).to match_array([])
+      expect(transformations.map(&:class)).to be_empty
     end
   end
 
   context "custom transformations" do
-    before(:each) do
+    before do
       InlineSvg.configure do |config|
         config.add_custom_transformation({ transform: ACustomTransform, attribute: :my_transform, priority: 2 })
         config.add_custom_transformation({ transform: ASecondCustomTransform, attribute: :my_other_transform, priority: 1 })
       end
     end
 
-    after(:each) do
+    after do
       InlineSvg.reset_configuration!
     end
 
@@ -107,7 +107,7 @@ class ASecondCustomTransform < ACustomTransform; end
         my_transform: :irrelevant
       )
 
-      expect(transformations.map(&:class)).to match_array([ACustomTransform])
+      expect(transformations.map(&:class)).to contain_exactly(ACustomTransform)
     end
 
     it "returns configured custom transformations in priority order" do
diff --git a/spec/webpack_asset_finder_spec.rb b/spec/webpack_asset_finder_spec.rb
index eb94ee7..d0a1b61 100644
--- a/spec/webpack_asset_finder_spec.rb
+++ b/spec/webpack_asset_finder_spec.rb
@@ -5,7 +5,7 @@
     it "returns nil" do
       stub_const('Rails', double('Rails').as_null_object)
       stub_const('Shakapacker', double('Shakapacker').as_null_object)
-      expect(::Shakapacker.manifest).to receive(:lookup).with('some-file').and_return(nil)
+      expect(Shakapacker.manifest).to receive(:lookup).with('some-file').and_return(nil)
 
       expect(described_class.find_asset('some-file').pathname).to be_nil
     end