diff --git a/lib/web-console.rb b/lib/web-console.rb
index 9edf0081..09c95e48 100644
--- a/lib/web-console.rb
+++ b/lib/web-console.rb
@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 require 'web_console'
diff --git a/lib/web_console.rb b/lib/web_console.rb
index 279c6bcc..823330cc 100644
--- a/lib/web_console.rb
+++ b/lib/web_console.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'active_support/dependencies/autoload'
 require 'active_support/logger'
 
diff --git a/lib/web_console/context.rb b/lib/web_console/context.rb
index 4d9650fc..f9e57c0b 100644
--- a/lib/web_console/context.rb
+++ b/lib/web_console/context.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # A context lets you get object names related to the current session binding.
   class Context
diff --git a/lib/web_console/errors.rb b/lib/web_console/errors.rb
index 66c80cbc..d523393d 100644
--- a/lib/web_console/errors.rb
+++ b/lib/web_console/errors.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # The base class for every Web Console related error.
   Error = Class.new(StandardError)
diff --git a/lib/web_console/evaluator.rb b/lib/web_console/evaluator.rb
index 472bf3a0..e8a9fea4 100644
--- a/lib/web_console/evaluator.rb
+++ b/lib/web_console/evaluator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # Simple Ruby code evaluator.
   #
@@ -25,7 +27,7 @@ def eval(input)
       def format_exception(exc)
         backtrace = cleaner.clean(Array(exc.backtrace) - caller)
 
-        format = "#{exc.class.name}: #{exc}\n"
+        format = "#{exc.class.name}: #{exc}\n".dup
         format << backtrace.map { |trace| "\tfrom #{trace}\n" }.join
         format
       end
diff --git a/lib/web_console/exception_mapper.rb b/lib/web_console/exception_mapper.rb
index 5cbcf830..959af2cc 100644
--- a/lib/web_console/exception_mapper.rb
+++ b/lib/web_console/exception_mapper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class ExceptionMapper
     def initialize(exception)
diff --git a/lib/web_console/extensions.rb b/lib/web_console/extensions.rb
index 0e831ced..fa79de25 100644
--- a/lib/web_console/extensions.rb
+++ b/lib/web_console/extensions.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Kernel
   module_function
 
diff --git a/lib/web_console/middleware.rb b/lib/web_console/middleware.rb
index a25cd655..a09dd13b 100644
--- a/lib/web_console/middleware.rb
+++ b/lib/web_console/middleware.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'active_support/core_ext/string/strip'
 
 module WebConsole
diff --git a/lib/web_console/railtie.rb b/lib/web_console/railtie.rb
index 9f3d0a40..f7063785 100644
--- a/lib/web_console/railtie.rb
+++ b/lib/web_console/railtie.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rails/railtie'
 
 module WebConsole
diff --git a/lib/web_console/request.rb b/lib/web_console/request.rb
index 53d1f8b4..18280c8d 100644
--- a/lib/web_console/request.rb
+++ b/lib/web_console/request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # Web Console tailored request object.
   class Request < ActionDispatch::Request
diff --git a/lib/web_console/response.rb b/lib/web_console/response.rb
index 0fc3d947..2c8c0b03 100644
--- a/lib/web_console/response.rb
+++ b/lib/web_console/response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # A response object that writes content before the closing </body> tag, if
   # possible.
diff --git a/lib/web_console/session.rb b/lib/web_console/session.rb
index f6accd80..9da4753e 100644
--- a/lib/web_console/session.rb
+++ b/lib/web_console/session.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # A session lets you persist an +Evaluator+ instance in memory associated
   # with multiple bindings.
diff --git a/lib/web_console/tasks/extensions.rake b/lib/web_console/tasks/extensions.rake
index 2035b841..9565cbfd 100644
--- a/lib/web_console/tasks/extensions.rake
+++ b/lib/web_console/tasks/extensions.rake
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :ext do
   rootdir = Pathname('extensions')
 
diff --git a/lib/web_console/tasks/templates.rake b/lib/web_console/tasks/templates.rake
index bf0fe14e..6526d30a 100644
--- a/lib/web_console/tasks/templates.rake
+++ b/lib/web_console/tasks/templates.rake
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :templates do
   desc 'Run tests for templates'
   task test: [ :daemonize, :npm, :rackup, :wait, :mocha, :kill, :exit ]
diff --git a/lib/web_console/template.rb b/lib/web_console/template.rb
index 8ff19b30..3f60342c 100644
--- a/lib/web_console/template.rb
+++ b/lib/web_console/template.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # A facade that handles template rendering and composition.
   #
diff --git a/lib/web_console/testing/erb_precompiler.rb b/lib/web_console/testing/erb_precompiler.rb
index 29cd050a..8e156bb0 100644
--- a/lib/web_console/testing/erb_precompiler.rb
+++ b/lib/web_console/testing/erb_precompiler.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'web_console/testing/helper'
 require 'web_console/testing/fake_middleware'
 
diff --git a/lib/web_console/testing/fake_middleware.rb b/lib/web_console/testing/fake_middleware.rb
index b58731a6..4dcf2d39 100644
--- a/lib/web_console/testing/fake_middleware.rb
+++ b/lib/web_console/testing/fake_middleware.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'action_view'
 require 'web_console'
 require 'web_console/testing/helper'
diff --git a/lib/web_console/testing/helper.rb b/lib/web_console/testing/helper.rb
index 00a7fa66..ba6f57c9 100644
--- a/lib/web_console/testing/helper.rb
+++ b/lib/web_console/testing/helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   module Testing
     module Helper
diff --git a/lib/web_console/version.rb b/lib/web_console/version.rb
index fe667298..a7a628cd 100644
--- a/lib/web_console/version.rb
+++ b/lib/web_console/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   VERSION = '3.5.1'
 end
diff --git a/lib/web_console/view.rb b/lib/web_console/view.rb
index 7e28725d..96e6ddd0 100644
--- a/lib/web_console/view.rb
+++ b/lib/web_console/view.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class View < ActionView::Base
     # Execute a block only on error pages.
diff --git a/lib/web_console/whiny_request.rb b/lib/web_console/whiny_request.rb
index c70f5138..1ef33a52 100644
--- a/lib/web_console/whiny_request.rb
+++ b/lib/web_console/whiny_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   # Noisy wrapper around +Request+.
   #
diff --git a/lib/web_console/whitelist.rb b/lib/web_console/whitelist.rb
index 80511cef..f14b228f 100644
--- a/lib/web_console/whitelist.rb
+++ b/lib/web_console/whitelist.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'ipaddr'
 
 module WebConsole
diff --git a/test/dummy/app/controllers/application_controller.rb b/test/dummy/app/controllers/application_controller.rb
index d83690e1..1ff0944d 100644
--- a/test/dummy/app/controllers/application_controller.rb
+++ b/test/dummy/app/controllers/application_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationController < ActionController::Base
   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
diff --git a/test/dummy/app/controllers/controller_helper_test_controller.rb b/test/dummy/app/controllers/controller_helper_test_controller.rb
index 8d5ed7b4..6fc68e9c 100644
--- a/test/dummy/app/controllers/controller_helper_test_controller.rb
+++ b/test/dummy/app/controllers/controller_helper_test_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ControllerHelperTestController < ApplicationController
   def index
     @instance_variable = "Helper Test"
diff --git a/test/dummy/app/controllers/exception_test_controller.rb b/test/dummy/app/controllers/exception_test_controller.rb
index d1d2340a..d3591b03 100644
--- a/test/dummy/app/controllers/exception_test_controller.rb
+++ b/test/dummy/app/controllers/exception_test_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ExceptionTestController < ApplicationController
   def index
     test = "Test"
diff --git a/test/dummy/app/controllers/helper_error_controller.rb b/test/dummy/app/controllers/helper_error_controller.rb
index d41f82e9..2b1e9e56 100644
--- a/test/dummy/app/controllers/helper_error_controller.rb
+++ b/test/dummy/app/controllers/helper_error_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class HelperErrorController < ApplicationController
   def index
   end
diff --git a/test/dummy/app/controllers/helper_test_controller.rb b/test/dummy/app/controllers/helper_test_controller.rb
index 2e2b655f..d7aeb82b 100644
--- a/test/dummy/app/controllers/helper_test_controller.rb
+++ b/test/dummy/app/controllers/helper_test_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class HelperTestController < ApplicationController
   def index
     @helper_test = "Helper Test"
diff --git a/test/dummy/app/controllers/model_test_controller.rb b/test/dummy/app/controllers/model_test_controller.rb
index 6d891191..76850ace 100644
--- a/test/dummy/app/controllers/model_test_controller.rb
+++ b/test/dummy/app/controllers/model_test_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ModelTestController < ApplicationController
   def index
     LocalModel.new.work
diff --git a/test/dummy/app/controllers/tests_controller.rb b/test/dummy/app/controllers/tests_controller.rb
index de36b38c..acd1f3ab 100644
--- a/test/dummy/app/controllers/tests_controller.rb
+++ b/test/dummy/app/controllers/tests_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TestsController < ApplicationController
   def render_console_ontop_of_text
     render text: '<h1 id="greeting">Hello World</h1>'
diff --git a/test/dummy/app/helpers/application_helper.rb b/test/dummy/app/helpers/application_helper.rb
index de6be794..15b06f0f 100644
--- a/test/dummy/app/helpers/application_helper.rb
+++ b/test/dummy/app/helpers/application_helper.rb
@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
 end
diff --git a/test/dummy/config/application.rb b/test/dummy/config/application.rb
index 83eab38e..a885ff3c 100644
--- a/test/dummy/config/application.rb
+++ b/test/dummy/config/application.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require File.expand_path('../boot', __FILE__)
 
 require "active_model/railtie"
diff --git a/test/dummy/config/boot.rb b/test/dummy/config/boot.rb
index 6266cfc5..18536532 100644
--- a/test/dummy/config/boot.rb
+++ b/test/dummy/config/boot.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Set up gems listed in the Gemfile.
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../../../Gemfile', __FILE__)
 
diff --git a/test/dummy/config/environment.rb b/test/dummy/config/environment.rb
index 82be82d5..d1dc305a 100644
--- a/test/dummy/config/environment.rb
+++ b/test/dummy/config/environment.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Load the rails application.
 require File.expand_path('../application', __FILE__)
 
diff --git a/test/dummy/config/environments/development.rb b/test/dummy/config/environments/development.rb
index b16dd2fb..64c57665 100644
--- a/test/dummy/config/environments/development.rb
+++ b/test/dummy/config/environments/development.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Dummy::Application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/test/dummy/config/environments/production.rb b/test/dummy/config/environments/production.rb
index dc33932f..aa6bfef9 100644
--- a/test/dummy/config/environments/production.rb
+++ b/test/dummy/config/environments/production.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Dummy::Application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/test/dummy/config/environments/test.rb b/test/dummy/config/environments/test.rb
index 897205ee..458b81f1 100644
--- a/test/dummy/config/environments/test.rb
+++ b/test/dummy/config/environments/test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Dummy::Application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/test/dummy/config/initializers/backtrace_silencers.rb b/test/dummy/config/initializers/backtrace_silencers.rb
index 59385cdf..4b63f289 100644
--- a/test/dummy/config/initializers/backtrace_silencers.rb
+++ b/test/dummy/config/initializers/backtrace_silencers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
diff --git a/test/dummy/config/initializers/filter_parameter_logging.rb b/test/dummy/config/initializers/filter_parameter_logging.rb
index 4a994e1e..7a4f47b4 100644
--- a/test/dummy/config/initializers/filter_parameter_logging.rb
+++ b/test/dummy/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Configure sensitive parameters which will be filtered from the log file.
diff --git a/test/dummy/config/initializers/inflections.rb b/test/dummy/config/initializers/inflections.rb
index ac033bf9..dc847422 100644
--- a/test/dummy/config/initializers/inflections.rb
+++ b/test/dummy/config/initializers/inflections.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
diff --git a/test/dummy/config/initializers/mime_types.rb b/test/dummy/config/initializers/mime_types.rb
index 72aca7e4..df5ec138 100644
--- a/test/dummy/config/initializers/mime_types.rb
+++ b/test/dummy/config/initializers/mime_types.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Add new mime types for use in respond_to blocks:
diff --git a/test/dummy/config/initializers/secret_token.rb b/test/dummy/config/initializers/secret_token.rb
index 8283e678..35005673 100644
--- a/test/dummy/config/initializers/secret_token.rb
+++ b/test/dummy/config/initializers/secret_token.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Your secret key is used for verifying the integrity of signed cookies.
diff --git a/test/dummy/config/initializers/session_store.rb b/test/dummy/config/initializers/session_store.rb
index 155f7b02..ba27628a 100644
--- a/test/dummy/config/initializers/session_store.rb
+++ b/test/dummy/config/initializers/session_store.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 Dummy::Application.config.session_store :cookie_store, key: '_dummy_session'
diff --git a/test/dummy/config/initializers/wrap_parameters.rb b/test/dummy/config/initializers/wrap_parameters.rb
index 33725e95..246168a4 100644
--- a/test/dummy/config/initializers/wrap_parameters.rb
+++ b/test/dummy/config/initializers/wrap_parameters.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # This file contains settings for ActionController::ParamsWrapper which
diff --git a/test/dummy/config/routes.rb b/test/dummy/config/routes.rb
index 0bad8550..7857fb5b 100644
--- a/test/dummy/config/routes.rb
+++ b/test/dummy/config/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.routes.draw do
   root to: "exception_test#index"
 
diff --git a/test/support/scenarios/bad_custom_error_scenario.rb b/test/support/scenarios/bad_custom_error_scenario.rb
index 3ab47ca3..624f7a15 100644
--- a/test/support/scenarios/bad_custom_error_scenario.rb
+++ b/test/support/scenarios/bad_custom_error_scenario.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class BadCustomErrorScenario
     class Error < StandardError
diff --git a/test/support/scenarios/basic_nested_scenario.rb b/test/support/scenarios/basic_nested_scenario.rb
index cac7c5ae..e8f718d2 100644
--- a/test/support/scenarios/basic_nested_scenario.rb
+++ b/test/support/scenarios/basic_nested_scenario.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class BasicNestedScenario
     def call
diff --git a/test/support/scenarios/custom_error_scenario.rb b/test/support/scenarios/custom_error_scenario.rb
index 2307b3dc..bd6e7037 100644
--- a/test/support/scenarios/custom_error_scenario.rb
+++ b/test/support/scenarios/custom_error_scenario.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class CustomErrorScenario
     Error = Class.new(StandardError)
diff --git a/test/support/scenarios/eval_nested_scenario.rb b/test/support/scenarios/eval_nested_scenario.rb
index d203752a..2ab0485d 100644
--- a/test/support/scenarios/eval_nested_scenario.rb
+++ b/test/support/scenarios/eval_nested_scenario.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class EvalNestedScenario
     def call
diff --git a/test/support/scenarios/flat_scenario.rb b/test/support/scenarios/flat_scenario.rb
index cb1c5372..13fd26f1 100644
--- a/test/support/scenarios/flat_scenario.rb
+++ b/test/support/scenarios/flat_scenario.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class FlatScenario
     def call
diff --git a/test/support/scenarios/reraised_scenario.rb b/test/support/scenarios/reraised_scenario.rb
index 27e3d31c..41defaf7 100644
--- a/test/support/scenarios/reraised_scenario.rb
+++ b/test/support/scenarios/reraised_scenario.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WebConsole
   class ReraisedScenario
     def call
diff --git a/test/test_helper.rb b/test/test_helper.rb
index e6395947..32c5d43c 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 case RUBY_ENGINE
 when 'ruby', 'rbx'
   require 'simplecov'
diff --git a/test/web_console/context_test.rb b/test/web_console/context_test.rb
index d124f60a..8e60037c 100644
--- a/test/web_console/context_test.rb
+++ b/test/web_console/context_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/evaluator_test.rb b/test/web_console/evaluator_test.rb
index d2ea9b95..17161d48 100644
--- a/test/web_console/evaluator_test.rb
+++ b/test/web_console/evaluator_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/exception_mapper_test.rb b/test/web_console/exception_mapper_test.rb
index a3a4fcd1..5f0aec61 100644
--- a/test/web_console/exception_mapper_test.rb
+++ b/test/web_console/exception_mapper_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/extensions_test.rb b/test/web_console/extensions_test.rb
index 08a33223..3425555d 100644
--- a/test/web_console/extensions_test.rb
+++ b/test/web_console/extensions_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 require 'web_console/extensions'
 
diff --git a/test/web_console/helper_test.rb b/test/web_console/helper_test.rb
index ce17400d..e6007d57 100644
--- a/test/web_console/helper_test.rb
+++ b/test/web_console/helper_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/integration_test.rb b/test/web_console/integration_test.rb
index 284bb6e9..9ad553a6 100644
--- a/test/web_console/integration_test.rb
+++ b/test/web_console/integration_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
@@ -5,37 +7,37 @@ class IntegrationTest < ActiveSupport::TestCase
     test 'Exception#bindings returns all the bindings of where the error originated' do
       exc = FlatScenario.new.call
 
-      assert_equal 4, exc.bindings.first.eval('__LINE__')
+      assert_equal 6, exc.bindings.first.eval('__LINE__')
     end
 
     test 'Exception#bindings returns all the bindings for a custom error' do
       exc = CustomErrorScenario.new.call
 
-      assert_equal 6, exc.bindings.first.eval('__LINE__')
+      assert_equal 8, exc.bindings.first.eval('__LINE__')
     end
 
     test 'Exception#bindings returns all the bindings for a bad custom error' do
       exc = BadCustomErrorScenario.new.call
 
-      assert_equal 11, exc.bindings.first.eval('__LINE__')
+      assert_equal 13, exc.bindings.first.eval('__LINE__')
     end
 
     test 'Exception#bindings goes down the stack' do
       exc = BasicNestedScenario.new.call
 
-      assert_equal 12, exc.bindings.first.eval('__LINE__')
+      assert_equal 14, exc.bindings.first.eval('__LINE__')
     end
 
     test 'Exception#bindings inside of an eval' do
       exc = EvalNestedScenario.new.call
 
-      assert_equal 12, exc.bindings.first.eval('__LINE__')
+      assert_equal 14, exc.bindings.first.eval('__LINE__')
     end
 
     test "re-raising doesn't lose Exception#bindings information" do
       exc = ReraisedScenario.new.call
 
-      assert_equal 4, exc.bindings.first.eval('__LINE__')
+      assert_equal 6, exc.bindings.first.eval('__LINE__')
     end
 
     test 'Exception#bindings is empty when exception is still not raised' do
diff --git a/test/web_console/middleware_test.rb b/test/web_console/middleware_test.rb
index fdd69190..f4d8b2b3 100644
--- a/test/web_console/middleware_test.rb
+++ b/test/web_console/middleware_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/railtie_test.rb b/test/web_console/railtie_test.rb
index 406543bb..c04083e1 100644
--- a/test/web_console/railtie_test.rb
+++ b/test/web_console/railtie_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/request_test.rb b/test/web_console/request_test.rb
index 01aa04db..e3ea2198 100644
--- a/test/web_console/request_test.rb
+++ b/test/web_console/request_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/session_test.rb b/test/web_console/session_test.rb
index 7ddab51a..30e41671 100644
--- a/test/web_console/session_test.rb
+++ b/test/web_console/session_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/whiny_request_test.rb b/test/web_console/whiny_request_test.rb
index f993b66c..513a81f1 100644
--- a/test/web_console/whiny_request_test.rb
+++ b/test/web_console/whiny_request_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole
diff --git a/test/web_console/whitelist_test.rb b/test/web_console/whitelist_test.rb
index bdbde275..b04e0194 100644
--- a/test/web_console/whitelist_test.rb
+++ b/test/web_console/whitelist_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module WebConsole