diff --git a/.rubocop.yml b/.rubocop.yml
index 1e233cef..e180f6d8 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -125,7 +125,7 @@ RSpec/ExampleWording:
   Enabled: false
 
 RSpec/InstanceVariable:
-  Enabled: false
+  AssignmentOnly: true
 
 RSpec/ExampleLength:
   Enabled: false
diff --git a/lib/capybara/spec/session/attach_file_spec.rb b/lib/capybara/spec/session/attach_file_spec.rb
index 7717b997..5a64bf00 100644
--- a/lib/capybara/spec/session/attach_file_spec.rb
+++ b/lib/capybara/spec/session/attach_file_spec.rb
@@ -1,11 +1,12 @@
 # frozen_string_literal: true
 
 Capybara::SpecHelper.spec '#attach_file' do
+  let(:test_file_path) { File.expand_path('../fixtures/test_file.txt', File.dirname(__FILE__)) }
+  let(:another_test_file_path) { File.expand_path('../fixtures/another_test_file.txt', File.dirname(__FILE__)) }
+  let(:test_jpg_file_path) { File.expand_path('../fixtures/capybara.jpg', File.dirname(__FILE__)) }
+  let(:no_extension_file_path) { File.expand_path('../fixtures/no_extension', File.dirname(__FILE__)) }
+
   before do
-    @test_file_path = File.expand_path('../fixtures/test_file.txt', File.dirname(__FILE__))
-    @another_test_file_path = File.expand_path('../fixtures/another_test_file.txt', File.dirname(__FILE__))
-    @test_jpg_file_path = File.expand_path('../fixtures/capybara.jpg', File.dirname(__FILE__))
-    @no_extension_file_path = File.expand_path('../fixtures/no_extension', File.dirname(__FILE__))
     @session.visit('/form')
   end
 
@@ -38,15 +39,15 @@ Capybara::SpecHelper.spec '#attach_file' do
 
   context 'with multipart form' do
     it 'should set a file path by id' do
-      @session.attach_file 'form_document', with_os_path_separators(@test_file_path)
+      @session.attach_file 'form_document', with_os_path_separators(test_file_path)
       @session.click_button('Upload Single')
-      expect(@session).to have_content(File.read(@test_file_path))
+      expect(@session).to have_content(File.read(test_file_path))
     end
 
     it 'should set a file path by label' do
-      @session.attach_file 'Single Document', with_os_path_separators(@test_file_path)
+      @session.attach_file 'Single Document', with_os_path_separators(test_file_path)
       @session.click_button('Upload Single')
-      expect(@session).to have_content(File.read(@test_file_path))
+      expect(@session).to have_content(File.read(test_file_path))
     end
 
     it 'should not break if no file is submitted' do
@@ -55,37 +56,37 @@ Capybara::SpecHelper.spec '#attach_file' do
     end
 
     it 'should send content type text/plain when uploading a text file' do
-      @session.attach_file 'Single Document', with_os_path_separators(@test_file_path)
+      @session.attach_file 'Single Document', with_os_path_separators(test_file_path)
       @session.click_button 'Upload Single'
       expect(@session).to have_content('text/plain')
     end
 
     it 'should send content type image/jpeg when uploading an image' do
-      @session.attach_file 'Single Document', with_os_path_separators(@test_jpg_file_path)
+      @session.attach_file 'Single Document', with_os_path_separators(test_jpg_file_path)
       @session.click_button 'Upload Single'
       expect(@session).to have_content('image/jpeg')
     end
 
     it 'should not break when uploading a file without extension' do
-      @session.attach_file 'Single Document', with_os_path_separators(@no_extension_file_path)
+      @session.attach_file 'Single Document', with_os_path_separators(no_extension_file_path)
       @session.click_button 'Upload Single'
-      expect(@session).to have_content(File.read(@no_extension_file_path))
+      expect(@session).to have_content(File.read(no_extension_file_path))
     end
 
     it 'should not break when using HTML5 multiple file input' do
-      @session.attach_file 'Multiple Documents', with_os_path_separators(@test_file_path)
+      @session.attach_file 'Multiple Documents', with_os_path_separators(test_file_path)
       @session.click_button('Upload Multiple')
-      expect(@session).to have_content(File.read(@test_file_path))
+      expect(@session).to have_content(File.read(test_file_path))
       expect(@session.body).to include('1 | ') # number of files
     end
 
     it 'should not break when using HTML5 multiple file input uploading multiple files' do
       @session.attach_file('Multiple Documents',
-                           [@test_file_path, @another_test_file_path].map { |f| with_os_path_separators(f) })
+                           [test_file_path, another_test_file_path].map { |f| with_os_path_separators(f) })
       @session.click_button('Upload Multiple')
       expect(@session.body).to include('2 | ') # number of files
-      expect(@session.body).to include(File.read(@test_file_path))
-      expect(@session.body).to include(File.read(@another_test_file_path))
+      expect(@session.body).to include(File.read(test_file_path))
+      expect(@session.body).to include(File.read(another_test_file_path))
     end
 
     it 'should not send anything when attaching no files to a multiple upload field' do
@@ -94,26 +95,26 @@ Capybara::SpecHelper.spec '#attach_file' do
     end
 
     it 'should not append files to already attached' do
-      @session.attach_file 'Multiple Documents', with_os_path_separators(@test_file_path)
-      @session.attach_file 'Multiple Documents', with_os_path_separators(@another_test_file_path)
+      @session.attach_file 'Multiple Documents', with_os_path_separators(test_file_path)
+      @session.attach_file 'Multiple Documents', with_os_path_separators(another_test_file_path)
       @session.click_button('Upload Multiple')
       expect(@session.body).to include('1 | ') # number of files
-      expect(@session.body).to include(File.read(@another_test_file_path))
-      expect(@session.body).not_to include(File.read(@test_file_path))
+      expect(@session.body).to include(File.read(another_test_file_path))
+      expect(@session.body).not_to include(File.read(test_file_path))
     end
 
     it 'should fire change once when uploading multiple files from empty', requires: [:js] do
       @session.visit('with_js')
       @session.attach_file('multiple-file',
-                           [@test_file_path, @another_test_file_path].map { |f| with_os_path_separators(f) })
+                           [test_file_path, another_test_file_path].map { |f| with_os_path_separators(f) })
       expect(@session).to have_css('.file_change', count: 1)
     end
 
     it 'should fire change once for each set of files uploaded', requires: [:js] do
       @session.visit('with_js')
-      @session.attach_file('multiple-file', [@test_jpg_file_path].map { |f| with_os_path_separators(f) })
+      @session.attach_file('multiple-file', [test_jpg_file_path].map { |f| with_os_path_separators(f) })
       @session.attach_file('multiple-file',
-                           [@test_file_path, @another_test_file_path].map { |f| with_os_path_separators(f) })
+                           [test_file_path, another_test_file_path].map { |f| with_os_path_separators(f) })
       expect(@session).to have_css('.file_change', count: 2)
     end
   end
@@ -122,7 +123,7 @@ Capybara::SpecHelper.spec '#attach_file' do
     it 'should raise an error' do
       msg = 'Unable to find file field "does not exist"'
       expect do
-        @session.attach_file('does not exist', with_os_path_separators(@test_file_path))
+        @session.attach_file('does not exist', with_os_path_separators(test_file_path))
       end.to raise_error(Capybara::ElementNotFound, msg)
     end
   end
diff --git a/lib/capybara/spec/session/click_button_spec.rb b/lib/capybara/spec/session/click_button_spec.rb
index cd6ab73b..3bc5620a 100644
--- a/lib/capybara/spec/session/click_button_spec.rb
+++ b/lib/capybara/spec/session/click_button_spec.rb
@@ -45,111 +45,113 @@ Capybara::SpecHelper.spec '#click_button' do
 
   context 'with value given on a submit button' do
     context 'on a form with HTML5 fields' do
+      let(:results) { extract_results(@session) }
+
       before do
         @session.click_button('html5_submit')
-        @results = extract_results(@session)
       end
 
       it 'should serialise and submit search fields' do
-        expect(@results['html5_search']).to eq('what are you looking for')
+        expect(results['html5_search']).to eq('what are you looking for')
       end
 
       it 'should serialise and submit email fields' do
-        expect(@results['html5_email']).to eq('person@email.com')
+        expect(results['html5_email']).to eq('person@email.com')
       end
 
       it 'should serialise and submit url fields' do
-        expect(@results['html5_url']).to eq('http://www.example.com')
+        expect(results['html5_url']).to eq('http://www.example.com')
       end
 
       it 'should serialise and submit tel fields' do
-        expect(@results['html5_tel']).to eq('911')
+        expect(results['html5_tel']).to eq('911')
       end
 
       it 'should serialise and submit color fields' do
-        expect(@results['html5_color'].upcase).to eq('#FFFFFF')
+        expect(results['html5_color'].upcase).to eq('#FFFFFF')
       end
     end
 
     context 'on an HTML4 form' do
+      let(:results) { extract_results(@session) }
+
       before do
         @session.click_button('awesome')
-        @results = extract_results(@session)
       end
 
       it 'should serialize and submit text fields' do
-        expect(@results['first_name']).to eq('John')
+        expect(results['first_name']).to eq('John')
       end
 
       it 'should escape fields when submitting' do
-        expect(@results['phone']).to eq('+1 555 7021')
+        expect(results['phone']).to eq('+1 555 7021')
       end
 
       it 'should serialize and submit password fields' do
-        expect(@results['password']).to eq('seeekrit')
+        expect(results['password']).to eq('seeekrit')
       end
 
       it 'should serialize and submit hidden fields' do
-        expect(@results['token']).to eq('12345')
+        expect(results['token']).to eq('12345')
       end
 
       it 'should not serialize fields from other forms' do
-        expect(@results['middle_name']).to be_nil
+        expect(results['middle_name']).to be_nil
       end
 
       it 'should submit the button that was clicked, but not other buttons' do
-        expect(@results['awesome']).to eq('awesome')
-        expect(@results['crappy']).to be_nil
+        expect(results['awesome']).to eq('awesome')
+        expect(results['crappy']).to be_nil
       end
 
       it 'should serialize radio buttons' do
-        expect(@results['gender']).to eq('female')
+        expect(results['gender']).to eq('female')
       end
 
       it "should default radio value to 'on' if none specified" do
-        expect(@results['valueless_radio']).to eq('on')
+        expect(results['valueless_radio']).to eq('on')
       end
 
       it 'should serialize check boxes' do
-        expect(@results['pets']).to include('dog', 'hamster')
-        expect(@results['pets']).not_to include('cat')
+        expect(results['pets']).to include('dog', 'hamster')
+        expect(results['pets']).not_to include('cat')
       end
 
       it "should default checkbox value to 'on' if none specififed" do
-        expect(@results['valueless_checkbox']).to eq('on')
+        expect(results['valueless_checkbox']).to eq('on')
       end
 
       it 'should serialize text areas' do
-        expect(@results['description']).to eq('Descriptive text goes here')
+        expect(results['description']).to eq('Descriptive text goes here')
       end
 
       it 'should serialize select tag with values' do
-        expect(@results['locale']).to eq('en')
+        expect(results['locale']).to eq('en')
       end
 
       it 'should serialize select tag without values' do
-        expect(@results['region']).to eq('Norway')
+        expect(results['region']).to eq('Norway')
       end
 
       it 'should serialize first option for select tag with no selection' do
-        expect(@results['city']).to eq('London')
+        expect(results['city']).to eq('London')
       end
 
       it 'should not serialize a select tag without options' do
-        expect(@results['tendency']).to be_nil
+        expect(results['tendency']).to be_nil
       end
 
       it 'should convert lf to cr/lf in submitted textareas' do
-        expect(@results['newline']).to eq("\r\nNew line after and before textarea tag\r\n")
+        expect(results['newline']).to eq("\r\nNew line after and before textarea tag\r\n")
       end
 
       it 'should not submit disabled fields' do
-        expect(@results['disabled_text_field']).to be_nil
-        expect(@results['disabled_textarea']).to be_nil
-        expect(@results['disabled_checkbox']).to be_nil
-        expect(@results['disabled_radio']).to be_nil
-        expect(@results['disabled_select']).to be_nil
-        expect(@results['disabled_file']).to be_nil
+        expect(results['disabled_text_field']).to be_nil
+        expect(results['disabled_textarea']).to be_nil
+        expect(results['disabled_checkbox']).to be_nil
+        expect(results['disabled_radio']).to be_nil
+        expect(results['disabled_select']).to be_nil
+        expect(results['disabled_file']).to be_nil
       end
     end
   end
@@ -172,57 +174,60 @@ Capybara::SpecHelper.spec '#click_button' do
   end
 
   context 'with fields associated with the form using the form attribute', requires: [:form_attribute] do
+    let(:results) { extract_results(@session) }
+
     before do
       @session.click_button('submit_form1')
-      @results = extract_results(@session)
     end
 
     it 'should serialize and submit text fields' do
-      expect(@results['outside_input']).to eq('outside_input')
+      expect(results['outside_input']).to eq('outside_input')
     end
 
     it 'should serialize text areas' do
-      expect(@results['outside_textarea']).to eq('Some text here')
+      expect(results['outside_textarea']).to eq('Some text here')
     end
 
     it 'should serialize select tags' do
-      expect(@results['outside_select']).to eq('Ruby')
+      expect(results['outside_select']).to eq('Ruby')
     end
 
     it 'should not serliaze fields associated with a different form' do
-      expect(@results['for_form2']).to be_nil
+      expect(results['for_form2']).to be_nil
     end
   end
 
   context 'with submit button outside the form defined by <button> tag', requires: [:form_attribute] do
+    let(:results) { extract_results(@session) }
+
     before do
       @session.click_button('outside_button')
-      @results = extract_results(@session)
     end
 
     it 'should submit the associated form' do
-      expect(@results['which_form']).to eq('form2')
+      expect(results['which_form']).to eq('form2')
     end
 
     it 'should submit the button that was clicked, but not other buttons' do
-      expect(@results['outside_button']).to eq('outside_button')
-      expect(@results['unused']).to be_nil
+      expect(results['outside_button']).to eq('outside_button')
+      expect(results['unused']).to be_nil
     end
   end
 
   context "with submit button outside the form defined by <input type='submit'> tag", requires: [:form_attribute] do
+    let(:results) { extract_results(@session) }
+
     before do
       @session.click_button('outside_submit')
-      @results = extract_results(@session)
     end
 
     it 'should submit the associated form' do
-      expect(@results['which_form']).to eq('form1')
+      expect(results['which_form']).to eq('form1')
     end
 
     it 'should submit the button that was clicked, but not other buttons' do
-      expect(@results['outside_submit']).to eq('outside_submit')
-      expect(@results['submit_form1']).to be_nil
+      expect(results['outside_submit']).to eq('outside_submit')
+      expect(results['submit_form1']).to be_nil
     end
   end
 
@@ -303,9 +308,9 @@ Capybara::SpecHelper.spec '#click_button' do
     it 'should serialize and send GET forms' do
       @session.visit('/form')
       @session.click_button('med')
-      @results = extract_results(@session)
-      expect(@results['middle_name']).to eq('Darren')
-      expect(@results['foo']).to be_nil
+      results = extract_results(@session)
+      expect(results['middle_name']).to eq('Darren')
+      expect(results['foo']).to be_nil
     end
   end
 
@@ -357,45 +362,45 @@ Capybara::SpecHelper.spec '#click_button' do
   context 'with formaction attribute on button' do
     it 'should submit to the formaction attribute' do
       @session.click_button('Formaction button')
-      @results = extract_results(@session)
+      results = extract_results(@session)
       expect(@session.current_path).to eq '/form'
-      expect(@results['which_form']).to eq 'formaction form'
+      expect(results['which_form']).to eq 'formaction form'
     end
   end
 
   context 'with formmethod attribute on button' do
     it 'should submit to the formethod attribute' do
       @session.click_button('Formmethod button')
-      @results = extract_results(@session)
+      results = extract_results(@session)
       expect(@session.current_path).to eq '/form/get'
-      expect(@results['which_form']).to eq 'formaction form'
+      expect(results['which_form']).to eq 'formaction form'
     end
   end
 
   it 'should serialize and send valueless buttons that were clicked' do
     @session.click_button('No Value!')
-    @results = extract_results(@session)
-    expect(@results['no_value']).not_to be_nil
+    results = extract_results(@session)
+    expect(results['no_value']).not_to be_nil
   end
 
   it 'should send button in document order' do
     @session.click_button('outside_button')
-    @results = extract_results(@session)
-    expect(@results.keys).to eq %w[for_form2 outside_button which_form post_count]
+    results = extract_results(@session)
+    expect(results.keys).to eq %w[for_form2 outside_button which_form post_count]
   end
 
   it 'should not send image buttons that were not clicked' do
     @session.click_button('Click me!')
-    @results = extract_results(@session)
-    expect(@results['okay']).to be_nil
+    results = extract_results(@session)
+    expect(results['okay']).to be_nil
   end
 
   it 'should serialize and send GET forms' do
     @session.visit('/form')
     @session.click_button('med')
-    @results = extract_results(@session)
-    expect(@results['middle_name']).to eq('Darren')
-    expect(@results['foo']).to be_nil
+    results = extract_results(@session)
+    expect(results['middle_name']).to eq('Darren')
+    expect(results['foo']).to be_nil
   end
 
   it 'should follow redirects' do
diff --git a/lib/capybara/spec/session/element/matches_selector_spec.rb b/lib/capybara/spec/session/element/matches_selector_spec.rb
index 958126f1..9ff72cca 100644
--- a/lib/capybara/spec/session/element/matches_selector_spec.rb
+++ b/lib/capybara/spec/session/element/matches_selector_spec.rb
@@ -1,31 +1,32 @@
 # frozen_string_literal: true
 
 Capybara::SpecHelper.spec '#match_selector?' do
+  let(:element) { @session.find(:xpath, '//span', text: '42') }
+
   before do
     @session.visit('/with_html')
-    @element = @session.find('//span', text: '42')
   end
 
   it 'should be true if the element matches the given selector' do
-    expect(@element).to match_selector(:xpath, '//span')
-    expect(@element).to match_selector(:css, 'span.number')
-    expect(@element.matches_selector?(:css, 'span.number')).to be true
+    expect(element).to match_selector(:xpath, '//span')
+    expect(element).to match_selector(:css, 'span.number')
+    expect(element.matches_selector?(:css, 'span.number')).to be true
   end
 
   it 'should be false if the element does not match the given selector' do
-    expect(@element).not_to match_selector(:xpath, '//div')
-    expect(@element).not_to match_selector(:css, 'span.not_a_number')
-    expect(@element.matches_selector?(:css, 'span.not_a_number')).to be false
+    expect(element).not_to match_selector(:xpath, '//div')
+    expect(element).not_to match_selector(:css, 'span.not_a_number')
+    expect(element.matches_selector?(:css, 'span.not_a_number')).to be false
   end
 
   it 'should use default selector' do
     Capybara.default_selector = :css
-    expect(@element).not_to match_selector('span.not_a_number')
-    expect(@element).to match_selector('span.number')
+    expect(element).not_to match_selector('span.not_a_number')
+    expect(element).to match_selector('span.number')
   end
 
   it 'should work with elements located via a sibling selector' do
-    sibling = @element.sibling(:css, 'span', text: 'Other span')
+    sibling = element.sibling(:css, 'span', text: 'Other span')
     expect(sibling).to match_selector(:xpath, '//span')
     expect(sibling).to match_selector(:css, 'span')
   end
@@ -37,23 +38,23 @@ Capybara::SpecHelper.spec '#match_selector?' do
 
   context 'with text' do
     it 'should discard all matches where the given string is not contained' do
-      expect(@element).to match_selector('//span', text: '42')
-      expect(@element).not_to match_selector('//span', text: 'Doesnotexist')
+      expect(element).to match_selector('//span', text: '42')
+      expect(element).not_to match_selector('//span', text: 'Doesnotexist')
     end
   end
 
   it 'should have css sugar' do
-    expect(@element.matches_css?('span.number')).to be true
-    expect(@element.matches_css?('span.not_a_number')).to be false
-    expect(@element.matches_css?('span.number', text: '42')).to be true
-    expect(@element.matches_css?('span.number', text: 'Nope')).to be false
+    expect(element.matches_css?('span.number')).to be true
+    expect(element.matches_css?('span.not_a_number')).to be false
+    expect(element.matches_css?('span.number', text: '42')).to be true
+    expect(element.matches_css?('span.number', text: 'Nope')).to be false
   end
 
   it 'should have xpath sugar' do
-    expect(@element.matches_xpath?('//span')).to be true
-    expect(@element.matches_xpath?('//div')).to be false
-    expect(@element.matches_xpath?('//span', text: '42')).to be true
-    expect(@element.matches_xpath?('//span', text: 'Nope')).to be false
+    expect(element.matches_xpath?('//span')).to be true
+    expect(element.matches_xpath?('//div')).to be false
+    expect(element.matches_xpath?('//span', text: '42')).to be true
+    expect(element.matches_xpath?('//span', text: 'Nope')).to be false
   end
 
   it 'should accept selector filters' do
@@ -73,47 +74,47 @@ Capybara::SpecHelper.spec '#match_selector?' do
 end
 
 Capybara::SpecHelper.spec '#not_matches_selector?' do
+  let(:element) { @session.find(:css, 'span', text: 42) }
   before do
     @session.visit('/with_html')
-    @element = @session.find(:css, 'span', text: 42)
   end
 
   it 'should be false if the given selector matches the element' do
-    expect(@element).not_to not_match_selector(:xpath, '//span')
-    expect(@element).not_to not_match_selector(:css, 'span.number')
-    expect(@element.not_matches_selector?(:css, 'span.number')).to be false
+    expect(element).not_to not_match_selector(:xpath, '//span')
+    expect(element).not_to not_match_selector(:css, 'span.number')
+    expect(element.not_matches_selector?(:css, 'span.number')).to be false
   end
 
   it 'should be true if the given selector does not match the element' do
-    expect(@element).to not_match_selector(:xpath, '//abbr')
-    expect(@element).to not_match_selector(:css, 'p a#doesnotexist')
-    expect(@element.not_matches_selector?(:css, 'p a#doesnotexist')).to be true
+    expect(element).to not_match_selector(:xpath, '//abbr')
+    expect(element).to not_match_selector(:css, 'p a#doesnotexist')
+    expect(element.not_matches_selector?(:css, 'p a#doesnotexist')).to be true
   end
 
   it 'should use default selector' do
     Capybara.default_selector = :css
-    expect(@element).to not_match_selector('p a#doesnotexist')
-    expect(@element).not_to not_match_selector('span.number')
+    expect(element).to not_match_selector('p a#doesnotexist')
+    expect(element).not_to not_match_selector('span.number')
   end
 
   context 'with text' do
     it 'should discard all matches where the given string is contained' do
-      expect(@element).not_to not_match_selector(:css, 'span.number', text: '42')
-      expect(@element).to not_match_selector(:css, 'span.number', text: 'Doesnotexist')
+      expect(element).not_to not_match_selector(:css, 'span.number', text: '42')
+      expect(element).to not_match_selector(:css, 'span.number', text: 'Doesnotexist')
     end
   end
 
   it 'should have CSS sugar' do
-    expect(@element.not_matches_css?('span.number')).to be false
-    expect(@element.not_matches_css?('p a#doesnotexist')).to be true
-    expect(@element.not_matches_css?('span.number', text: '42')).to be false
-    expect(@element.not_matches_css?('span.number', text: 'Doesnotexist')).to be true
+    expect(element.not_matches_css?('span.number')).to be false
+    expect(element.not_matches_css?('p a#doesnotexist')).to be true
+    expect(element.not_matches_css?('span.number', text: '42')).to be false
+    expect(element.not_matches_css?('span.number', text: 'Doesnotexist')).to be true
   end
 
   it 'should have xpath sugar' do
-    expect(@element.not_matches_xpath?('//span')).to be false
-    expect(@element.not_matches_xpath?('//div')).to be true
-    expect(@element.not_matches_xpath?('//span', text: '42')).to be false
-    expect(@element.not_matches_xpath?('//span', text: 'Doesnotexist')).to be true
+    expect(element.not_matches_xpath?('//span')).to be false
+    expect(element.not_matches_xpath?('//div')).to be true
+    expect(element.not_matches_xpath?('//span', text: '42')).to be false
+    expect(element.not_matches_xpath?('//span', text: 'Doesnotexist')).to be true
   end
 end
diff --git a/lib/capybara/spec/session/node_spec.rb b/lib/capybara/spec/session/node_spec.rb
index cd94a757..39f40a6f 100644
--- a/lib/capybara/spec/session/node_spec.rb
+++ b/lib/capybara/spec/session/node_spec.rb
@@ -25,9 +25,9 @@ Capybara::SpecHelper.spec 'node' do
 
   describe '#query_scope' do
     it 'should have a reference to the element the query was evaluated on if there is one' do
-      @node = @session.find(:css, '#first')
-      expect(@node.query_scope).to eq(@node.session.document)
-      expect(@node.find(:css, '#foo').query_scope).to eq(@node)
+      node = @session.find(:css, '#first')
+      expect(node.query_scope).to eq(node.session.document)
+      expect(node.find(:css, '#foo').query_scope).to eq(node)
     end
   end
 
diff --git a/lib/capybara/spec/session/reset_session_spec.rb b/lib/capybara/spec/session/reset_session_spec.rb
index 7b16ce88..28640e5a 100644
--- a/lib/capybara/spec/session/reset_session_spec.rb
+++ b/lib/capybara/spec/session/reset_session_spec.rb
@@ -96,25 +96,26 @@ Capybara::SpecHelper.spec '#reset_session!' do
   end
 
   context 'When reuse_server == false' do
+    let!(:orig_reuse_server) { Capybara.reuse_server }
+
     before do
-      @reuse_server = Capybara.reuse_server
       Capybara.reuse_server = false
     end
 
     after do
-      Capybara.reuse_server = @reuse_server
+      Capybara.reuse_server = orig_reuse_server
     end
 
     it 'raises any standard errors caught inside the server during a second session', requires: [:server] do
       Capybara.using_driver(@session.mode) do
         Capybara.using_session(:another_session) do
-          @another_session = Capybara.current_session
-          quietly { @another_session.visit('/error') }
+          another_session = Capybara.current_session
+          quietly { another_session.visit('/error') }
           expect do
-            @another_session.reset_session!
+            another_session.reset_session!
           end.to raise_error(TestApp::TestAppError)
-          @another_session.visit('/')
-          expect(@another_session.current_path).to eq('/')
+          another_session.visit('/')
+          expect(another_session.current_path).to eq('/')
         end
       end
     end
diff --git a/lib/capybara/spec/session/window/become_closed_spec.rb b/lib/capybara/spec/session/window/become_closed_spec.rb
index a36635e2..5e579ac3 100644
--- a/lib/capybara/spec/session/window/become_closed_spec.rb
+++ b/lib/capybara/spec/session/window/become_closed_spec.rb
@@ -1,38 +1,41 @@
 # frozen_string_literal: true
 
 Capybara::SpecHelper.spec '#become_closed', requires: %i[windows js] do
-  before do
-    @window = @session.current_window
-    @session.visit('/with_windows')
-    @other_window = @session.window_opened_by do
+  let!(:window) { @session.current_window }
+  let(:other_window) do
+    @session.window_opened_by do
       @session.find(:css, '#openWindow').click
     end
   end
 
+  before do
+    @session.visit('/with_windows')
+  end
+
   after do
     @session.document.synchronize(5, errors: [Capybara::CapybaraError]) do
       raise Capybara::CapybaraError if @session.windows.size != 1
     end
-    @session.switch_to_window(@window)
+    @session.switch_to_window(window)
   end
 
   context 'with :wait option' do
     it 'should wait if value of :wait is more than timeout' do
-      @session.within_window @other_window do
+      @session.within_window other_window do
         @session.execute_script('setTimeout(function(){ window.close(); }, 500);')
       end
       Capybara.using_wait_time 0.1 do
-        expect(@other_window).to become_closed(wait: 5)
+        expect(other_window).to become_closed(wait: 5)
       end
     end
 
     it 'should raise error if value of :wait is less than timeout' do
-      @session.within_window @other_window do
+      @session.within_window other_window do
         @session.execute_script('setTimeout(function(){ window.close(); }, 1000);')
       end
       Capybara.using_wait_time 2 do
         expect do
-          expect(@other_window).to become_closed(wait: 0.2)
+          expect(other_window).to become_closed(wait: 0.2)
         end.to raise_error(RSpec::Expectations::ExpectationNotMetError, /\Aexpected #<Window @handle=".+"> to become closed after 0.2 seconds\Z/)
       end
     end
@@ -40,21 +43,21 @@ Capybara::SpecHelper.spec '#become_closed', requires: %i[windows js] do
 
   context 'without :wait option' do
     it 'should wait if value of default_max_wait_time is more than timeout' do
-      @session.within_window @other_window do
+      @session.within_window other_window do
         @session.execute_script('setTimeout(function(){ window.close(); }, 500);')
       end
       Capybara.using_wait_time 5 do
-        expect(@other_window).to become_closed
+        expect(other_window).to become_closed
       end
     end
 
     it 'should raise error if value of default_max_wait_time is less than timeout' do
-      @session.within_window @other_window do
+      @session.within_window other_window do
         @session.execute_script('setTimeout(function(){ window.close(); }, 900);')
       end
       Capybara.using_wait_time 0.4 do
         expect do
-          expect(@other_window).to become_closed
+          expect(other_window).to become_closed
         end.to raise_error(RSpec::Expectations::ExpectationNotMetError, /\Aexpected #<Window @handle=".+"> to become closed after 0.4 seconds\Z/)
       end
     end
@@ -62,23 +65,23 @@ Capybara::SpecHelper.spec '#become_closed', requires: %i[windows js] do
 
   context 'with not_to' do
     it "should not raise error if window doesn't close before default_max_wait_time" do
-      @session.within_window @other_window do
+      @session.within_window other_window do
         @session.execute_script('setTimeout(function(){ window.close(); }, 1000);')
       end
       Capybara.using_wait_time 0.3 do
         expect do
-          expect(@other_window).not_to become_closed
+          expect(other_window).not_to become_closed
         end.not_to raise_error
       end
     end
 
     it 'should raise error if window closes before default_max_wait_time' do
-      @session.within_window @other_window do
+      @session.within_window other_window do
         @session.execute_script('setTimeout(function(){ window.close(); }, 700);')
       end
       Capybara.using_wait_time 3.1 do
         expect do
-          expect(@other_window).not_to become_closed
+          expect(other_window).not_to become_closed
         end.to raise_error(RSpec::Expectations::ExpectationNotMetError, /\Aexpected #<Window @handle=".+"> not to become closed after 3.1 seconds\Z/)
       end
     end
diff --git a/lib/capybara/spec/session/window/window_spec.rb b/lib/capybara/spec/session/window/window_spec.rb
index e213dcad..709b258e 100644
--- a/lib/capybara/spec/session/window/window_spec.rb
+++ b/lib/capybara/spec/session/window/window_spec.rb
@@ -5,89 +5,87 @@
 # using Capybara provided assertions with builtin waiting behavior.
 
 Capybara::SpecHelper.spec Capybara::Window, requires: [:windows] do
+  let!(:orig_window) { @session.current_window }
   before do
-    @window = @session.current_window
     @session.visit('/with_windows')
   end
 
   after do
-    (@session.windows - [@window]).each do |w|
+    (@session.windows - [orig_window]).each do |w|
       @session.switch_to_window w
       w.close
     end
-    @session.switch_to_window(@window)
+    @session.switch_to_window(orig_window)
   end
 
   describe '#exists?' do
-    before do
-      @other_window = @session.window_opened_by do
+    it 'should become false after window was closed' do
+      other_window = @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
-    end
 
-    it 'should become false after window was closed' do
       expect do
-        @session.switch_to_window @other_window
-        @other_window.close
-      end.to change { @other_window.exists? }.from(true).to(false)
+        @session.switch_to_window other_window
+        other_window.close
+      end.to change(other_window, :exists?).from(true).to(false)
     end
   end
 
   describe '#closed?' do
     it 'should become true after window was closed' do
-      @other_window = @session.window_opened_by do
+      other_window = @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
       expect do
-        @session.switch_to_window @other_window
-        @other_window.close
-      end.to change { @other_window.closed? }.from(false).to(true)
+        @session.switch_to_window other_window
+        other_window.close
+      end.to change { other_window.closed? }.from(false).to(true)
     end
   end
 
   describe '#current?' do
-    before do
-      @other_window = @session.window_opened_by do
+    let(:other_window) do
+      @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
     end
 
     it 'should become true after switching to window' do
       expect do
-        @session.switch_to_window(@other_window)
-      end.to change { @other_window.current? }.from(false).to(true)
+        @session.switch_to_window(other_window)
+      end.to change(other_window, :current?).from(false).to(true)
     end
 
     it 'should return false if window is closed' do
-      @session.switch_to_window(@other_window)
-      @other_window.close
-      expect(@other_window.current?).to eq(false)
+      @session.switch_to_window(other_window)
+      other_window.close
+      expect(other_window.current?).to eq(false)
     end
   end
 
   describe '#close' do
-    before do
-      @other_window = @session.window_opened_by do
+    let!(:other_window) do
+      @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
     end
 
     it 'should switch to original window if invoked not for current window' do
       expect(@session.windows.size).to eq(2)
-      expect(@session.current_window).to eq(@window)
-      @other_window.close
+      expect(@session.current_window).to eq(orig_window)
+      other_window.close
       expect(@session.windows.size).to eq(1)
-      expect(@session.current_window).to eq(@window)
+      expect(@session.current_window).to eq(orig_window)
     end
 
     it 'should make subsequent invocations of other methods raise no_such_window_error if invoked for current window' do
-      @session.switch_to_window(@other_window)
-      expect(@session.current_window).to eq(@other_window)
-      @other_window.close
+      @session.switch_to_window(other_window)
+      expect(@session.current_window).to eq(other_window)
+      other_window.close
       expect do
         @session.find(:css, '#some_id')
       end.to raise_error(@session.driver.no_such_window_error)
-      @session.switch_to_window(@window)
+      @session.switch_to_window(orig_window)
     end
   end
 
@@ -101,43 +99,41 @@ Capybara::SpecHelper.spec Capybara::Window, requires: [:windows] do
     end
 
     it 'should switch to original window if invoked not for current window' do
-      @other_window = @session.window_opened_by do
+      other_window = @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
       sleep 1
-      size = @session.within_window(@other_window) do
+      size = @session.within_window(other_window) do
         win_size
       end
-      expect(@other_window.size).to eq(size)
-      expect(@session.current_window).to eq(@window)
+      expect(other_window.size).to eq(size)
+      expect(@session.current_window).to eq(orig_window)
     end
   end
 
   describe '#resize_to' do
-    before do
-      @initial_size = @session.current_window.size
-    end
+    let!(:initial_size) { @session.current_window.size }
 
     after do
-      @session.current_window.resize_to(*@initial_size)
+      @session.current_window.resize_to(*initial_size)
       sleep 1
     end
 
     it 'should be able to resize window', requires: %i[windows js] do
-      width, height = @initial_size
+      width, height = initial_size
       @session.current_window.resize_to(width - 100, height - 100)
       sleep 1
       expect(@session.current_window.size).to eq([width - 100, height - 100])
     end
 
     it 'should stay on current window if invoked not for current window', requires: %i[windows js] do
-      @other_window = @session.window_opened_by do
+      other_window = @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
-      @other_window.resize_to(600, 300)
-      expect(@session.current_window).to eq(@window)
+      other_window.resize_to(600, 300)
+      expect(@session.current_window).to eq(orig_window)
 
-      @session.within_window(@other_window) do
+      @session.within_window(other_window) do
         expect(@session.current_window.size).to eq([600, 300])
       end
     end
@@ -169,19 +165,19 @@ Capybara::SpecHelper.spec Capybara::Window, requires: [:windows] do
     end
 
     it 'should stay on current window if invoked not for current window', requires: %i[windows js] do
-      @other_window = @session.window_opened_by do
+      other_window = @session.window_opened_by do
         @session.find(:css, '#openWindow').click
       end
-      @other_window.resize_to(400, 300)
+      other_window.resize_to(400, 300)
       sleep 0.5
-      @other_window.maximize
+      other_window.maximize
       sleep 0.5 # The timing on maximize is finicky on Travis -- wait a bit for maximize to occur
 
-      expect(@session.current_window).to eq(@window)
+      expect(@session.current_window).to eq(orig_window)
       # Maximizing the browser affects all tabs so this may not be valid in real browsers
       # expect(@session.current_window.size).to eq(@initial_size)
 
-      ow_width, ow_height = @other_window.size
+      ow_width, ow_height = other_window.size
       expect(ow_width).to be > 400
       expect(ow_height).to be > 300
     end
diff --git a/spec/capybara_spec.rb b/spec/capybara_spec.rb
index 0e688bae..dcc773c6 100644
--- a/spec/capybara_spec.rb
+++ b/spec/capybara_spec.rb
@@ -4,12 +4,12 @@ require 'spec_helper'
 
 RSpec.describe Capybara do
   describe 'default_max_wait_time' do
-    after do
-      Capybara.default_max_wait_time = @previous_default_time
-    end
+    before { @previous_default_time = Capybara.default_max_wait_time }
+
+    after { Capybara.default_max_wait_time = @previous_default_time } # rubocop:disable RSpec/InstanceVariable
 
     it 'should be changeable' do
-      @previous_default_time = Capybara.default_max_wait_time
+      expect(Capybara.default_max_wait_time).not_to eq(5)
       Capybara.default_max_wait_time = 5
       expect(Capybara.default_max_wait_time).to eq(5)
     end
diff --git a/spec/css_builder_spec.rb b/spec/css_builder_spec.rb
index b3804ff4..e00f8556 100644
--- a/spec/css_builder_spec.rb
+++ b/spec/css_builder_spec.rb
@@ -2,6 +2,7 @@
 
 require 'spec_helper'
 
+# rubocop:disable RSpec/InstanceVariable
 RSpec.describe Capybara::Selector::CSSBuilder do
   let :builder do
     ::Capybara::Selector::CSSBuilder.new(@css)
@@ -97,3 +98,4 @@ RSpec.describe Capybara::Selector::CSSBuilder do
     end
   end
 end
+# rubocop:enable RSpec/InstanceVariable
diff --git a/spec/dsl_spec.rb b/spec/dsl_spec.rb
index ad8e3541..299f9f29 100644
--- a/spec/dsl_spec.rb
+++ b/spec/dsl_spec.rb
@@ -115,14 +115,11 @@ RSpec.describe Capybara::DSL do
     end
   end
 
+  # rubocop:disable RSpec/InstanceVariable
   describe '#using_wait_time' do
-    before do
-      @previous_wait_time = Capybara.default_max_wait_time
-    end
+    before { @previous_wait_time = Capybara.default_max_wait_time }
 
-    after do
-      Capybara.default_max_wait_time = @previous_wait_time
-    end
+    after { Capybara.default_max_wait_time = @previous_wait_time }
 
     it 'should switch the wait time and switch it back' do
       in_block = nil
@@ -142,6 +139,7 @@ RSpec.describe Capybara::DSL do
       expect(Capybara.default_max_wait_time).to eq(@previous_wait_time)
     end
   end
+  # rubocop:enable RSpec/InstanceVariable
 
   describe '#app' do
     it 'should be changeable' do
@@ -249,31 +247,29 @@ RSpec.describe Capybara::DSL do
   end
 
   describe 'the DSL' do
-    before do
-      @session = Class.new { include Capybara::DSL }.new
-    end
+    let(:session) { Class.new { include Capybara::DSL }.new }
 
     it 'should be possible to include it in another class' do
-      @session.visit('/with_html')
-      @session.click_link('ullamco')
-      expect(@session.body).to include('Another World')
+      session.visit('/with_html')
+      session.click_link('ullamco')
+      expect(session.body).to include('Another World')
     end
 
     it "should provide a 'page' shortcut for more expressive tests" do
-      @session.page.visit('/with_html')
-      @session.page.click_link('ullamco')
-      expect(@session.page.body).to include('Another World')
+      session.page.visit('/with_html')
+      session.page.click_link('ullamco')
+      expect(session.page.body).to include('Another World')
     end
 
     it "should provide an 'using_session' shortcut" do
       allow(Capybara).to receive(:using_session)
-      @session.using_session(:name)
+      session.using_session(:name)
       expect(Capybara).to have_received(:using_session).with(:name)
     end
 
     it "should provide a 'using_wait_time' shortcut" do
       allow(Capybara).to receive(:using_wait_time)
-      @session.using_wait_time(6)
+      session.using_wait_time(6)
       expect(Capybara).to have_received(:using_wait_time).with(6)
     end
   end
diff --git a/spec/rack_test_spec.rb b/spec/rack_test_spec.rb
index 2dbe7df5..f0827892 100644
--- a/spec/rack_test_spec.rb
+++ b/spec/rack_test_spec.rb
@@ -37,55 +37,53 @@ end
 
 RSpec.describe Capybara::Session do # rubocop:disable RSpec/MultipleDescribes
   context 'with rack test driver' do
-    before do
-      @session = TestSessions::RackTest
-    end
+    let(:session) { TestSessions::RackTest }
 
     describe '#driver' do
       it 'should be a rack test driver' do
-        expect(@session.driver).to be_an_instance_of(Capybara::RackTest::Driver)
+        expect(session.driver).to be_an_instance_of(Capybara::RackTest::Driver)
       end
     end
 
     describe '#mode' do
       it 'should remember the mode' do
-        expect(@session.mode).to eq(:rack_test)
+        expect(session.mode).to eq(:rack_test)
       end
     end
 
     describe '#click_link' do
       after do
-        @session.driver.options[:respect_data_method] = false
+        session.driver.options[:respect_data_method] = false
       end
 
       it 'should use data-method if option is true' do
-        @session.driver.options[:respect_data_method] = true
-        @session.visit '/with_html'
-        @session.click_link 'A link with data-method'
-        expect(@session.html).to include('The requested object was deleted')
+        session.driver.options[:respect_data_method] = true
+        session.visit '/with_html'
+        session.click_link 'A link with data-method'
+        expect(session.html).to include('The requested object was deleted')
       end
 
       it 'should not use data-method if option is false' do
-        @session.driver.options[:respect_data_method] = false
-        @session.visit '/with_html'
-        @session.click_link 'A link with data-method'
-        expect(@session.html).to include('Not deleted')
+        session.driver.options[:respect_data_method] = false
+        session.visit '/with_html'
+        session.click_link 'A link with data-method'
+        expect(session.html).to include('Not deleted')
       end
 
       it "should use data-method if available even if it's capitalized" do
-        @session.driver.options[:respect_data_method] = true
-        @session.visit '/with_html'
-        @session.click_link 'A link with capitalized data-method'
-        expect(@session.html).to include('The requested object was deleted')
+        session.driver.options[:respect_data_method] = true
+        session.visit '/with_html'
+        session.click_link 'A link with capitalized data-method'
+        expect(session.html).to include('The requested object was deleted')
       end
     end
 
     describe '#fill_in' do
       it 'should warn that :fill_options are not supported' do
         allow_any_instance_of(Capybara::RackTest::Node).to receive(:warn)
-        @session.visit '/with_html'
-        field = @session.fill_in 'test_field', with: 'not_monkey', fill_options: { random: true }
-        expect(@session).to have_field('test_field', with: 'not_monkey')
+        session.visit '/with_html'
+        field = session.fill_in 'test_field', with: 'not_monkey', fill_options: { random: true }
+        expect(session).to have_field('test_field', with: 'not_monkey')
         expect(field.base).to have_received(:warn).with("Options passed to Node#set but the RackTest driver doesn't support any - ignoring")
       end
     end
@@ -93,50 +91,50 @@ RSpec.describe Capybara::Session do # rubocop:disable RSpec/MultipleDescribes
     describe '#attach_file' do
       context 'with multipart form' do
         it 'should submit an empty form-data section if no file is submitted' do
-          @session.visit('/form')
-          @session.click_button('Upload Empty')
-          expect(@session.html).to include('Successfully ignored empty file field.')
+          session.visit('/form')
+          session.click_button('Upload Empty')
+          expect(session.html).to include('Successfully ignored empty file field.')
         end
       end
 
       it 'should not submit an obsolete mime type' do
-        @test_jpg_file_path = File.expand_path('fixtures/capybara.csv', File.dirname(__FILE__))
-        @session.visit('/form')
-        @session.attach_file 'form_document', @test_jpg_file_path
-        @session.click_button('Upload Single')
-        expect(@session).to have_content('Content-type: text/csv')
+        test_jpg_file_path = File.expand_path('fixtures/capybara.csv', File.dirname(__FILE__))
+        session.visit('/form')
+        session.attach_file 'form_document', test_jpg_file_path
+        session.click_button('Upload Single')
+        expect(session).to have_content('Content-type: text/csv')
       end
     end
 
     describe '#click' do
       context 'on a label' do
         it 'should toggle the associated checkbox' do
-          @session.visit('/form')
-          expect(@session).to have_unchecked_field('form_pets_cat')
-          @session.find(:label, 'Cat').click
-          expect(@session).to have_checked_field('form_pets_cat')
-          @session.find(:label, 'Cat').click
-          expect(@session).to have_unchecked_field('form_pets_cat')
-          @session.find(:label, 'McLaren').click
-          expect(@session).to have_checked_field('form_cars_mclaren', visible: :hidden)
+          session.visit('/form')
+          expect(session).to have_unchecked_field('form_pets_cat')
+          session.find(:label, 'Cat').click
+          expect(session).to have_checked_field('form_pets_cat')
+          session.find(:label, 'Cat').click
+          expect(session).to have_unchecked_field('form_pets_cat')
+          session.find(:label, 'McLaren').click
+          expect(session).to have_checked_field('form_cars_mclaren', visible: :hidden)
         end
 
         it 'should toggle the associated radio' do
-          @session.visit('/form')
-          expect(@session).to have_unchecked_field('gender_male')
-          @session.find(:label, 'Male').click
-          expect(@session).to have_checked_field('gender_male')
-          @session.find(:label, 'Female').click
-          expect(@session).to have_unchecked_field('gender_male')
+          session.visit('/form')
+          expect(session).to have_unchecked_field('gender_male')
+          session.find(:label, 'Male').click
+          expect(session).to have_checked_field('gender_male')
+          session.find(:label, 'Female').click
+          expect(session).to have_unchecked_field('gender_male')
         end
       end
     end
 
     describe '#text' do
       it 'should return original text content for textareas' do
-        @session.visit('/with_html')
-        @session.find_field('normal', type: 'textarea', with: 'banana').set('hello')
-        normal = @session.find(:css, '#normal')
+        session.visit('/with_html')
+        session.find_field('normal', type: 'textarea', with: 'banana').set('hello')
+        normal = session.find(:css, '#normal')
         expect(normal.value).to eq 'hello'
         expect(normal.text).to eq 'banana'
       end
@@ -144,8 +142,8 @@ RSpec.describe Capybara::Session do # rubocop:disable RSpec/MultipleDescribes
 
     describe '#style' do
       it 'should raise an error' do
-        @session.visit('/with_html')
-        el = @session.find(:css, '#first')
+        session.visit('/with_html')
+        el = session.find(:css, '#first')
         expect { el.style('display') }.to raise_error NotImplementedError, /not process CSS/
       end
     end
@@ -153,87 +151,81 @@ RSpec.describe Capybara::Session do # rubocop:disable RSpec/MultipleDescribes
 end
 
 RSpec.describe Capybara::RackTest::Driver do
-  before do
-    @driver = TestSessions::RackTest.driver
-  end
+  let(:driver) { TestSessions::RackTest.driver }
 
   describe ':headers option' do
     it 'should always set headers' do
-      @driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
-      @driver.visit('/get_header')
-      expect(@driver.html).to include('foobar')
+      driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
+      driver.visit('/get_header')
+      expect(driver.html).to include('foobar')
     end
 
     it 'should keep headers on link clicks' do
-      @driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
-      @driver.visit('/header_links')
-      @driver.find_xpath('.//a').first.click
-      expect(@driver.html).to include('foobar')
+      driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
+      driver.visit('/header_links')
+      driver.find_xpath('.//a').first.click
+      expect(driver.html).to include('foobar')
     end
 
     it 'should keep headers on form submit' do
-      @driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
-      @driver.visit('/header_links')
-      @driver.find_xpath('.//input').first.click
-      expect(@driver.html).to include('foobar')
+      driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
+      driver.visit('/header_links')
+      driver.find_xpath('.//input').first.click
+      expect(driver.html).to include('foobar')
     end
 
     it 'should keep headers on redirects' do
-      @driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
-      @driver.visit('/get_header_via_redirect')
-      expect(@driver.html).to include('foobar')
+      driver = Capybara::RackTest::Driver.new(TestApp, headers: { 'HTTP_FOO' => 'foobar' })
+      driver.visit('/get_header_via_redirect')
+      expect(driver.html).to include('foobar')
     end
   end
 
   describe ':follow_redirects option' do
     it 'defaults to following redirects' do
-      @driver = Capybara::RackTest::Driver.new(TestApp)
+      driver = Capybara::RackTest::Driver.new(TestApp)
 
-      @driver.visit('/redirect')
-      expect(@driver.response.header['Location']).to be_nil
-      expect(@driver.current_url).to match %r{/landed$}
+      driver.visit('/redirect')
+      expect(driver.response.header['Location']).to be_nil
+      expect(driver.current_url).to match %r{/landed$}
     end
 
     it 'is possible to not follow redirects' do
-      @driver = Capybara::RackTest::Driver.new(TestApp, follow_redirects: false)
+      driver = Capybara::RackTest::Driver.new(TestApp, follow_redirects: false)
 
-      @driver.visit('/redirect')
-      expect(@driver.response.header['Location']).to match %r{/redirect_again$}
-      expect(@driver.current_url).to match %r{/redirect$}
+      driver.visit('/redirect')
+      expect(driver.response.header['Location']).to match %r{/redirect_again$}
+      expect(driver.current_url).to match %r{/redirect$}
     end
   end
 
   describe ':redirect_limit option' do
     context 'with default redirect limit' do
-      before do
-        @driver = Capybara::RackTest::Driver.new(TestApp)
-      end
+      let(:driver) { Capybara::RackTest::Driver.new(TestApp) }
 
       it 'should follow 5 redirects' do
-        @driver.visit('/redirect/5/times')
-        expect(@driver.html).to include('redirection complete')
+        driver.visit('/redirect/5/times')
+        expect(driver.html).to include('redirection complete')
       end
 
       it 'should not follow more than 6 redirects' do
         expect do
-          @driver.visit('/redirect/6/times')
+          driver.visit('/redirect/6/times')
         end.to raise_error(Capybara::InfiniteRedirectError)
       end
     end
 
     context 'with 21 redirect limit' do
-      before do
-        @driver = Capybara::RackTest::Driver.new(TestApp, redirect_limit: 21)
-      end
+      let(:driver) { Capybara::RackTest::Driver.new(TestApp, redirect_limit: 21) }
 
       it 'should follow 21 redirects' do
-        @driver.visit('/redirect/21/times')
-        expect(@driver.html).to include('redirection complete')
+        driver.visit('/redirect/21/times')
+        expect(driver.html).to include('redirection complete')
       end
 
       it 'should not follow more than 21 redirects' do
         expect do
-          @driver.visit('/redirect/22/times')
+          driver.visit('/redirect/22/times')
         end.to raise_error(Capybara::InfiniteRedirectError)
       end
     end
diff --git a/spec/rspec/features_spec.rb b/spec/rspec/features_spec.rb
index 2f9f183e..ca03277c 100644
--- a/spec/rspec/features_spec.rb
+++ b/spec/rspec/features_spec.rb
@@ -3,6 +3,7 @@
 require 'spec_helper'
 require 'capybara/rspec'
 
+# rubocop:disable RSpec/InstanceVariable
 RSpec.configuration.before(:each, file_path: './spec/rspec/features_spec.rb') do
   @in_filtered_hook = true
 end
@@ -53,6 +54,7 @@ feature "Capybara's feature DSL" do
     end
   end
 end
+# rubocop:enable RSpec/InstanceVariable
 
 feature 'given and given! aliases to let and let!' do
   given(:value) { :available }
diff --git a/spec/rspec/shared_spec_matchers.rb b/spec/rspec/shared_spec_matchers.rb
index 2eda6a8d..1f724ef7 100644
--- a/spec/rspec/shared_spec_matchers.rb
+++ b/spec/rspec/shared_spec_matchers.rb
@@ -555,21 +555,20 @@ RSpec.shared_examples Capybara::RSpecMatchers do |session, _mode|
 
       context 'with wait' do
         before do
-          @session = session
-          @session.visit('/with_js')
+          session.visit('/with_js')
         end
 
         it 'waits if wait time is more than timeout' do
-          @session.click_link('Change title')
+          session.click_link('Change title')
           using_wait_time 0 do
-            expect(@session).to have_title('changed title', wait: 2)
+            expect(session).to have_title('changed title', wait: 2)
           end
         end
 
         it "doesn't wait if wait time is less than timeout" do
-          @session.click_link('Change title')
+          session.click_link('Change title')
           using_wait_time 3 do
-            expect(@session).not_to have_title('changed title', wait: 0)
+            expect(session).not_to have_title('changed title', wait: 0)
           end
         end
       end
@@ -600,21 +599,20 @@ RSpec.shared_examples Capybara::RSpecMatchers do |session, _mode|
 
       context 'with wait' do
         before do
-          @session = session
-          @session.visit('/with_js')
+          session.visit('/with_js')
         end
 
         it 'waits if wait time is more than timeout' do
-          @session.click_link('Change page')
+          session.click_link('Change page')
           using_wait_time 0 do
-            expect(@session).to have_current_path('/with_html', wait: 2)
+            expect(session).to have_current_path('/with_html', wait: 2)
           end
         end
 
         it "doesn't wait if wait time is less than timeout" do
-          @session.click_link('Change page')
+          session.click_link('Change page')
           using_wait_time 0 do
-            expect(@session).not_to have_current_path('/with_html')
+            expect(session).not_to have_current_path('/with_html')
           end
         end
       end
@@ -848,10 +846,11 @@ RSpec.shared_examples Capybara::RSpecMatchers do |session, _mode|
   end
 
   context 'compounding timing' do
+    let(:session) { session }
+    let(:el) { session.find(:css, '#reload-me') }
+
     before do
-      @session = session
-      @session.visit('/with_js')
-      @el = @session.find(:css, '#reload-me')
+      session.visit('/with_js')
     end
 
     context '#and' do
@@ -860,82 +859,82 @@ RSpec.shared_examples Capybara::RSpecMatchers do |session, _mode|
           matcher = have_text('this is not there').and have_text('neither is this')
           expect(Benchmark.realtime do
             expect do
-              expect(@el).to matcher
+              expect(el).to matcher
             end.to raise_error RSpec::Expectations::ExpectationNotMetError
           end).to be_between(2, 3)
         end
       end
 
       it "should run 'concurrently' and retry" do
-        @session.click_link('reload-link')
-        @session.using_wait_time(2) do
+        session.click_link('reload-link')
+        session.using_wait_time(2) do
           expect(Benchmark.realtime do
             expect do
-              expect(@el).to have_text('waiting to be reloaded').and(have_text('has been reloaded'))
+              expect(el).to have_text('waiting to be reloaded').and(have_text('has been reloaded'))
             end.to raise_error RSpec::Expectations::ExpectationNotMetError, /expected to find text "waiting to be reloaded" in "has been reloaded"/
           end).to be_between(2, 3)
         end
       end
 
       it 'should ignore :wait options' do
-        @session.using_wait_time(2) do
+        session.using_wait_time(2) do
           matcher = have_text('this is not there', wait: 5).and have_text('neither is this', wait: 6)
           expect(Benchmark.realtime do
             expect do
-              expect(@el).to matcher
+              expect(el).to matcher
             end.to raise_error RSpec::Expectations::ExpectationNotMetError
           end).to be_between(2, 3)
         end
       end
 
       it 'should work on the session' do
-        @session.using_wait_time(2) do
-          @session.click_link('reload-link')
-          expect(@session).to have_selector(:css, 'h1', text: 'FooBar').and have_text('has been reloaded')
+        session.using_wait_time(2) do
+          session.click_link('reload-link')
+          expect(session).to have_selector(:css, 'h1', text: 'FooBar').and have_text('has been reloaded')
         end
       end
     end
 
     context '#and_then' do
       it 'should run sequentially' do
-        @session.click_link('reload-link')
-        expect(@el).to have_text('waiting to be reloaded').and_then have_text('has been reloaded')
+        session.click_link('reload-link')
+        expect(el).to have_text('waiting to be reloaded').and_then have_text('has been reloaded')
       end
     end
 
     context '#or' do
       it "should run 'concurrently'" do
-        @session.using_wait_time(3) do
+        session.using_wait_time(3) do
           expect(Benchmark.realtime do
-            expect(@el).to have_text('has been reloaded').or have_text('waiting to be reloaded')
+            expect(el).to have_text('has been reloaded').or have_text('waiting to be reloaded')
           end).to be < 1
         end
       end
 
       it 'should retry' do
-        @session.using_wait_time(3) do
+        session.using_wait_time(3) do
           expect(Benchmark.realtime do
             expect do
-              expect(@el).to have_text('has been reloaded').or have_text('random stuff')
+              expect(el).to have_text('has been reloaded').or have_text('random stuff')
             end.to raise_error RSpec::Expectations::ExpectationNotMetError
           end).to be > 3
         end
       end
 
       it 'should ignore :wait options' do
-        @session.using_wait_time(2) do
+        session.using_wait_time(2) do
           expect(Benchmark.realtime do
             expect do
-              expect(@el).to have_text('this is not there', wait: 10).or have_text('neither is this', wait: 15)
+              expect(el).to have_text('this is not there', wait: 10).or have_text('neither is this', wait: 15)
             end.to raise_error RSpec::Expectations::ExpectationNotMetError
           end).to be_between(2, 3)
         end
       end
 
       it 'should work on the session' do
-        @session.using_wait_time(2) do
-          @session.click_link('reload-link')
-          expect(@session).to have_selector(:css, 'h1', text: 'Not on the page').or have_text('has been reloaded')
+        session.using_wait_time(2) do
+          session.click_link('reload-link')
+          expect(session).to have_selector(:css, 'h1', text: 'Not on the page').or have_text('has been reloaded')
         end
       end
     end
diff --git a/spec/rspec_spec.rb b/spec/rspec_spec.rb
index b655319c..be860562 100644
--- a/spec/rspec_spec.rb
+++ b/spec/rspec_spec.rb
@@ -75,40 +75,38 @@ RSpec.describe 'capybara/rspec' do
 
   context 'Type: Other', type: :other do
     context 'when RSpec::Matchers is included after Capybara::DSL' do
-      before do
+      let(:test_class_instance) do
         class DSLMatchersTest
           include Capybara::DSL
           include RSpec::Matchers
-        end
-
-        @test_class_instance = DSLMatchersTest.new
+        end.new
       end
 
       context '#all' do
         it 'allows access to the Capybara finder' do
-          @test_class_instance.visit('/with_html')
-          expect(@test_class_instance.all(:css, 'h2.head').size).to eq(5)
+          test_class_instance.visit('/with_html')
+          expect(test_class_instance.all(:css, 'h2.head').size).to eq(5)
         end
 
         it 'allows access to the RSpec matcher' do
-          @test_class_instance.visit('/with_html')
+          test_class_instance.visit('/with_html')
           strings = %w[test1 test2]
-          expect(strings).to @test_class_instance.all(be_a(String))
+          expect(strings).to test_class_instance.all(be_a(String))
         end
       end
 
       context '#within' do
         it 'allows access to the Capybara scoper' do
-          @test_class_instance.visit('/with_html')
+          test_class_instance.visit('/with_html')
           expect do
-            @test_class_instance.within(:css, '#does_not_exist') { @test_class_instance.click_link 'Go to simple' }
+            test_class_instance.within(:css, '#does_not_exist') { test_class_instance.click_link 'Go to simple' }
           end.to raise_error(Capybara::ElementNotFound)
         end
 
         it 'allows access to the RSpec matcher' do
-          @test_class_instance.visit('/with_html')
+          test_class_instance.visit('/with_html')
           # This reads terribly, but must call #within
-          expect(@test_class_instance.find(:css, 'span.number').text.to_i).to @test_class_instance.within(1).of(41)
+          expect(test_class_instance.find(:css, 'span.number').text.to_i).to test_class_instance.within(1).of(41)
         end
       end
 
@@ -124,7 +122,7 @@ RSpec.describe 'capybara/rspec' do
         it 'can be called with `not_to`' do
           # This test is for a bug in jruby where `super` isn't defined correctly - https://github.com/jruby/jruby/issues/4678
           # Reported in https://github.com/teamcapybara/capybara/issues/2115
-          @test_class_instance.instance_eval do
+          test_class_instance.instance_eval do
             expect do
               expect(true).not_to only_match_matcher(false) # rubocop:disable RSpec/ExpectActual
             end.not_to raise_error
diff --git a/spec/selenium_spec_chrome.rb b/spec/selenium_spec_chrome.rb
index d1cd06d8..c9d3de8a 100644
--- a/spec/selenium_spec_chrome.rb
+++ b/spec/selenium_spec_chrome.rb
@@ -50,23 +50,23 @@ RSpec.describe 'Capybara::Session with chrome' do
   context 'storage' do
     describe '#reset!' do
       it 'clears storage by default' do
-        @session = TestSessions::Chrome
-        @session.visit('/with_js')
-        @session.find(:css, '#set-storage').click
-        @session.reset!
-        @session.visit('/with_js')
-        expect(@session.evaluate_script('Object.keys(localStorage)')).to be_empty
-        expect(@session.evaluate_script('Object.keys(sessionStorage)')).to be_empty
+        session = TestSessions::Chrome
+        session.visit('/with_js')
+        session.find(:css, '#set-storage').click
+        session.reset!
+        session.visit('/with_js')
+        expect(session.evaluate_script('Object.keys(localStorage)')).to be_empty
+        expect(session.evaluate_script('Object.keys(sessionStorage)')).to be_empty
       end
 
       it 'does not clear storage when false' do
-        @session = Capybara::Session.new(:selenium_chrome_not_clear_storage, TestApp)
-        @session.visit('/with_js')
-        @session.find(:css, '#set-storage').click
-        @session.reset!
-        @session.visit('/with_js')
-        expect(@session.evaluate_script('Object.keys(localStorage)')).not_to be_empty
-        expect(@session.evaluate_script('Object.keys(sessionStorage)')).not_to be_empty
+        session = Capybara::Session.new(:selenium_chrome_not_clear_storage, TestApp)
+        session.visit('/with_js')
+        session.find(:css, '#set-storage').click
+        session.reset!
+        session.visit('/with_js')
+        expect(session.evaluate_script('Object.keys(localStorage)')).not_to be_empty
+        expect(session.evaluate_script('Object.keys(sessionStorage)')).not_to be_empty
       end
     end
   end
@@ -79,29 +79,29 @@ RSpec.describe 'Capybara::Session with chrome' do
 
   describe 'filling in Chrome-specific date and time fields with keystrokes' do
     let(:datetime) { Time.new(1983, 6, 19, 6, 30) }
+    let(:session) { TestSessions::Chrome }
 
     before do
-      @session = TestSessions::Chrome
-      @session.visit('/form')
+      session.visit('/form')
     end
 
     it 'should fill in a date input with a String' do
-      @session.fill_in('form_date', with: '06/19/1983')
-      @session.click_button('awesome')
-      expect(Date.parse(extract_results(@session)['date'])).to eq datetime.to_date
+      session.fill_in('form_date', with: '06/19/1983')
+      session.click_button('awesome')
+      expect(Date.parse(extract_results(session)['date'])).to eq datetime.to_date
     end
 
     it 'should fill in a time input with a String' do
-      @session.fill_in('form_time', with: '06:30A')
-      @session.click_button('awesome')
-      results = extract_results(@session)['time']
+      session.fill_in('form_time', with: '06:30A')
+      session.click_button('awesome')
+      results = extract_results(session)['time']
       expect(Time.parse(results).strftime('%r')).to eq datetime.strftime('%r')
     end
 
     it 'should fill in a datetime input with a String' do
-      @session.fill_in('form_datetime', with: "06/19/1983\t06:30A")
-      @session.click_button('awesome')
-      expect(Time.parse(extract_results(@session)['datetime'])).to eq datetime
+      session.fill_in('form_datetime', with: "06/19/1983\t06:30A")
+      session.click_button('awesome')
+      expect(Time.parse(extract_results(session)['datetime'])).to eq datetime
     end
   end
 end
diff --git a/spec/selenium_spec_firefox.rb b/spec/selenium_spec_firefox.rb
index 68970869..dce87a7d 100644
--- a/spec/selenium_spec_firefox.rb
+++ b/spec/selenium_spec_firefox.rb
@@ -74,51 +74,47 @@ RSpec.describe 'Capybara::Session with firefox' do # rubocop:disable RSpec/Multi
 end
 
 RSpec.describe Capybara::Selenium::Driver do
-  before do
-    @driver = Capybara::Selenium::Driver.new(TestApp, browser: :firefox, options: browser_options)
-  end
+  let(:driver) { Capybara::Selenium::Driver.new(TestApp, browser: :firefox, options: browser_options) }
 
   describe '#quit' do
     it 'should reset browser when quit' do
-      expect(@driver.browser).to be_truthy
-      @driver.quit
+      expect(driver.browser).to be_truthy
+      driver.quit
       # access instance variable directly so we don't create a new browser instance
-      expect(@driver.instance_variable_get(:@browser)).to be_nil
+      expect(driver.instance_variable_get(:@browser)).to be_nil
     end
 
     context 'with errors' do
-      before do
-        @original_browser = @driver.browser
-      end
+      let!(:original_browser) { driver.browser }
 
       after do
         # Ensure browser is actually quit so we don't leave hanging processe
-        RSpec::Mocks.space.proxy_for(@original_browser).reset
-        @original_browser.quit
+        RSpec::Mocks.space.proxy_for(original_browser).reset
+        original_browser.quit
       end
 
       it 'warns UnknownError returned during quit because the browser is probably already gone' do
-        allow(@driver).to receive(:warn)
-        allow(@driver.browser).to(
+        allow(driver).to receive(:warn)
+        allow(driver.browser).to(
           receive(:quit)
           .and_raise(Selenium::WebDriver::Error::UnknownError, 'random message')
         )
 
-        expect { @driver.quit }.not_to raise_error
-        expect(@driver.instance_variable_get(:@browser)).to be_nil
-        expect(@driver).to have_received(:warn).with(/random message/)
+        expect { driver.quit }.not_to raise_error
+        expect(driver.instance_variable_get(:@browser)).to be_nil
+        expect(driver).to have_received(:warn).with(/random message/)
       end
 
       it 'ignores silenced UnknownError returned during quit because the browser is almost definitely already gone' do
-        allow(@driver).to receive(:warn)
-        allow(@driver.browser).to(
+        allow(driver).to receive(:warn)
+        allow(driver.browser).to(
           receive(:quit)
           .and_raise(Selenium::WebDriver::Error::UnknownError, 'Error communicating with the remote browser')
         )
 
-        expect { @driver.quit }.not_to raise_error
-        expect(@driver.instance_variable_get(:@browser)).to be_nil
-        expect(@driver).not_to have_received(:warn)
+        expect { driver.quit }.not_to raise_error
+        expect(driver.instance_variable_get(:@browser)).to be_nil
+        expect(driver).not_to have_received(:warn)
       end
     end
   end
@@ -126,23 +122,23 @@ RSpec.describe Capybara::Selenium::Driver do
   context 'storage' do
     describe '#reset!' do
       it 'clears storage by default' do
-        @session = TestSessions::SeleniumFirefox
-        @session.visit('/with_js')
-        @session.find(:css, '#set-storage').click
-        @session.reset!
-        @session.visit('/with_js')
-        expect(@session.driver.browser.local_storage.keys).to be_empty
-        expect(@session.driver.browser.session_storage.keys).to be_empty
+        session = TestSessions::SeleniumFirefox
+        session.visit('/with_js')
+        session.find(:css, '#set-storage').click
+        session.reset!
+        session.visit('/with_js')
+        expect(session.driver.browser.local_storage.keys).to be_empty
+        expect(session.driver.browser.session_storage.keys).to be_empty
       end
 
       it 'does not clear storage when false' do
-        @session = Capybara::Session.new(:selenium_firefox_not_clear_storage, TestApp)
-        @session.visit('/with_js')
-        @session.find(:css, '#set-storage').click
-        @session.reset!
-        @session.visit('/with_js')
-        expect(@session.driver.browser.local_storage.keys).not_to be_empty
-        expect(@session.driver.browser.session_storage.keys).not_to be_empty
+        session = Capybara::Session.new(:selenium_firefox_not_clear_storage, TestApp)
+        session.visit('/with_js')
+        session.find(:css, '#set-storage').click
+        session.reset!
+        session.visit('/with_js')
+        expect(session.driver.browser.local_storage.keys).not_to be_empty
+        expect(session.driver.browser.session_storage.keys).not_to be_empty
       end
     end
   end
diff --git a/spec/server_spec.rb b/spec/server_spec.rb
index 3bc614c7..fe2c7227 100644
--- a/spec/server_spec.rb
+++ b/spec/server_spec.rb
@@ -4,17 +4,17 @@ require 'spec_helper'
 
 RSpec.describe Capybara::Server do
   it 'should spool up a rack server' do
-    @app = proc { |_env| [200, {}, ['Hello Server!']] }
-    @server = Capybara::Server.new(@app).boot
+    app = proc { |_env| [200, {}, ['Hello Server!']] }
+    server = Capybara::Server.new(app).boot
 
-    @res = Net::HTTP.start(@server.host, @server.port) { |http| http.get('/') }
+    res = Net::HTTP.start(server.host, server.port) { |http| http.get('/') }
 
-    expect(@res.body).to include('Hello Server')
+    expect(res.body).to include('Hello Server')
   end
 
   it 'should do nothing when no server given' do
     expect do
-      @server = Capybara::Server.new(nil).boot
+      Capybara::Server.new(nil).boot
     end.not_to raise_error
   end
 
@@ -42,37 +42,36 @@ RSpec.describe Capybara::Server do
   it 'should use specified port' do
     Capybara.server_port = 22789
 
-    @app = proc { |_env| [200, {}, ['Hello Server!']] }
-    @server = Capybara::Server.new(@app).boot
+    app = proc { |_env| [200, {}, ['Hello Server!']] }
+    server = Capybara::Server.new(app).boot
 
-    @res = Net::HTTP.start(@server.host, 22789) { |http| http.get('/') }
-    expect(@res.body).to include('Hello Server')
+    res = Net::HTTP.start(server.host, 22789) { |http| http.get('/') }
+    expect(res.body).to include('Hello Server')
 
     Capybara.server_port = nil
   end
 
   it 'should use given port' do
-    @app = proc { |_env| [200, {}, ['Hello Server!']] }
-    @server = Capybara::Server.new(@app, port: 22790).boot
+    app = proc { |_env| [200, {}, ['Hello Server!']] }
+    server = Capybara::Server.new(app, port: 22790).boot
 
-    @res = Net::HTTP.start(@server.host, 22790) { |http| http.get('/') }
-    expect(@res.body).to include('Hello Server')
+    res = Net::HTTP.start(server.host, 22790) { |http| http.get('/') }
+    expect(res.body).to include('Hello Server')
 
     Capybara.server_port = nil
   end
 
   it 'should find an available port' do
-    @app1 = proc { |_env| [200, {}, ['Hello Server!']] }
-    @app2 = proc { |_env| [200, {}, ['Hello Second Server!']] }
+    responses = ['Hello Server!', 'Hello Second Server!']
+    apps = responses.map do |response|
+      proc { |_env| [200, {}, [response]] }
+    end
+    servers = apps.map { |app| Capybara::Server.new(app).boot }
 
-    @server1 = Capybara::Server.new(@app1).boot
-    @server2 = Capybara::Server.new(@app2).boot
-
-    @res1 = Net::HTTP.start(@server1.host, @server1.port) { |http| http.get('/') }
-    expect(@res1.body).to include('Hello Server')
-
-    @res2 = Net::HTTP.start(@server2.host, @server2.port) { |http| http.get('/') }
-    expect(@res2.body).to include('Hello Second Server')
+    servers.each_with_index do |server, idx|
+      result = Net::HTTP.start(server.host, server.port) { |http| http.get('/') }
+      expect(result.body).to include(responses[idx])
+    end
   end
 
   it 'should support SSL' do
@@ -98,28 +97,27 @@ RSpec.describe Capybara::Server do
   end
 
   context 'When Capybara.reuse_server is true' do
+    let!(:old_reuse_server) { Capybara.reuse_server }
+
     before do
-      @old_reuse_server = Capybara.reuse_server
       Capybara.reuse_server = true
     end
 
     after do
-      Capybara.reuse_server = @old_reuse_server
+      Capybara.reuse_server = old_reuse_server
     end
 
     it 'should use the existing server if it already running' do
-      @app = proc { |_env| [200, {}, ['Hello Server!']] }
+      app = proc { |_env| [200, {}, ['Hello Server!']] }
 
-      @server1 = Capybara::Server.new(@app).boot
-      @server2 = Capybara::Server.new(@app).boot
+      servers = Array.new(2) { Capybara::Server.new(app).boot }
 
-      res = Net::HTTP.start(@server1.host, @server1.port) { |http| http.get('/') }
-      expect(res.body).to include('Hello Server')
+      servers.each do |server|
+        res = Net::HTTP.start(server.host, server.port) { |http| http.get('/') }
+        expect(res.body).to include('Hello Server')
+      end
 
-      res = Net::HTTP.start(@server2.host, @server2.port) { |http| http.get('/') }
-      expect(res.body).to include('Hello Server')
-
-      expect(@server1.port).to eq(@server2.port)
+      expect(servers[0].port).to eq(servers[1].port)
     end
 
     it 'detects and waits for all reused server sessions pending requests' do
@@ -151,22 +149,20 @@ RSpec.describe Capybara::Server do
     end
 
     after do
-      Capybara.reuse_server = @old_reuse_server
+      Capybara.reuse_server = @old_reuse_server # rubocop:disable RSpec/InstanceVariable
     end
 
     it 'should not reuse an already running server' do
-      @app = proc { |_env| [200, {}, ['Hello Server!']] }
+      app = proc { |_env| [200, {}, ['Hello Server!']] }
 
-      @server1 = Capybara::Server.new(@app).boot
-      @server2 = Capybara::Server.new(@app).boot
+      servers = Array.new(2) { Capybara::Server.new(app).boot }
 
-      res = Net::HTTP.start(@server1.host, @server1.port) { |http| http.get('/') }
-      expect(res.body).to include('Hello Server')
+      servers.each do |server|
+        res = Net::HTTP.start(server.host, server.port) { |http| http.get('/') }
+        expect(res.body).to include('Hello Server')
+      end
 
-      res = Net::HTTP.start(@server2.host, @server2.port) { |http| http.get('/') }
-      expect(res.body).to include('Hello Server')
-
-      expect(@server1.port).not_to eq(@server2.port)
+      expect(servers[0].port).not_to eq(servers[1].port)
     end
 
     it 'detects and waits for only one sessions pending requests' do
diff --git a/spec/shared_selenium_session.rb b/spec/shared_selenium_session.rb
index 20bd12f5..6041310e 100644
--- a/spec/shared_selenium_session.rb
+++ b/spec/shared_selenium_session.rb
@@ -28,27 +28,28 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
     end
 
     describe 'exit codes' do
+      let(:env) { { 'SELENIUM_BROWSER' => session.driver.options[:browser].to_s } }
+      let!(:orig_dir) { Dir.getwd }
+
       before do
-        @current_dir = Dir.getwd
         Dir.chdir(File.join(File.dirname(__FILE__), '..'))
-        @env = { 'SELENIUM_BROWSER' => session.driver.options[:browser].to_s }
       end
 
       after do
-        Dir.chdir(@current_dir)
+        Dir.chdir(orig_dir)
       end
 
       it 'should have return code 1 when running selenium_driver_rspec_failure.rb' do
         skip 'only setup for local non-headless' if headless_or_remote?
 
-        system(@env, 'rspec spec/fixtures/selenium_driver_rspec_failure.rb', out: File::NULL, err: File::NULL)
+        system(env, 'rspec spec/fixtures/selenium_driver_rspec_failure.rb', out: File::NULL, err: File::NULL)
         expect($CHILD_STATUS.exitstatus).to eq(1)
       end
 
       it 'should have return code 0 when running selenium_driver_rspec_success.rb' do
         skip 'only setup for local non-headless' if headless_or_remote?
 
-        system(@env, 'rspec spec/fixtures/selenium_driver_rspec_success.rb', out: File::NULL, err: File::NULL)
+        system(env, 'rspec spec/fixtures/selenium_driver_rspec_success.rb', out: File::NULL, err: File::NULL)
         expect($CHILD_STATUS.exitstatus).to eq(0)
       end
     end
@@ -351,8 +352,8 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
         pending "IE doesn't support uploading a directory" if ie?(session)
 
         session.visit('/form')
-        @test_file_dir = File.expand_path('./fixtures', File.dirname(__FILE__))
-        session.attach_file('Directory Upload', @test_file_dir)
+        test_file_dir = File.expand_path('./fixtures', File.dirname(__FILE__))
+        session.attach_file('Directory Upload', test_file_dir)
         session.click_button('Upload Multiple')
         expect(session.body).to include('5 | ') # number of files
       end
@@ -366,6 +367,7 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
       end
     end
 
+    # rubocop:disable RSpec/InstanceVariable
     describe 'Capybara#disable_animation' do
       context 'when set to `true`' do
         before(:context) do # rubocop:disable RSpec/BeforeAfterAll
@@ -375,10 +377,6 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
           @animation_session = Capybara::Session.new(session.mode, TestApp.new)
         end
 
-        after(:context) do # rubocop:disable RSpec/BeforeAfterAll
-          @animation_session = nil
-        end
-
         it 'should disable CSS transitions' do
           @animation_session.visit('with_animation')
           @animation_session.click_link('transition me away')
@@ -400,10 +398,6 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
           @animation_session_with_matching_css = Capybara::Session.new(session.mode, TestApp.new)
         end
 
-        after(:context) do # rubocop:disable RSpec/BeforeAfterAll
-          @animation_session_with_matching_css = nil
-        end
-
         it 'should disable CSS transitions' do
           @animation_session_with_matching_css.visit('with_animation')
           @animation_session_with_matching_css.click_link('transition me away')
@@ -425,10 +419,6 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
           @animation_session_without_matching_css = Capybara::Session.new(session.mode, TestApp.new)
         end
 
-        after(:context) do # rubocop:disable RSpec/BeforeAfterAll
-          @animation_session_without_matching_css = nil
-        end
-
         it 'should not disable CSS transitions' do
           @animation_session_without_matching_css.visit('with_animation')
           @animation_session_without_matching_css.click_link('transition me away')
@@ -446,6 +436,7 @@ RSpec.shared_examples 'Capybara::Session' do |session, mode|
         end
       end
     end
+    # rubocop:enable RSpec/InstanceVariable
 
     describe ':element selector' do
       it 'can find html5 svg elements' do
diff --git a/spec/xpath_builder_spec.rb b/spec/xpath_builder_spec.rb
index e7546df0..d621c7c0 100644
--- a/spec/xpath_builder_spec.rb
+++ b/spec/xpath_builder_spec.rb
@@ -2,6 +2,7 @@
 
 require 'spec_helper'
 
+# rubocop:disable RSpec/InstanceVariable
 RSpec.describe Capybara::Selector::XPathBuilder do
   let :builder do
     ::Capybara::Selector::XPathBuilder.new(@xpath)
@@ -89,3 +90,4 @@ RSpec.describe Capybara::Selector::XPathBuilder do
     end
   end
 end
+# rubocop:enable RSpec/InstanceVariable