diff --git a/rb/lib/selenium/webdriver/common/logger.rb b/rb/lib/selenium/webdriver/common/logger.rb
index 0010eb459a5f0..3868ceb1231d1 100644
--- a/rb/lib/selenium/webdriver/common/logger.rb
+++ b/rb/lib/selenium/webdriver/common/logger.rb
@@ -35,54 +35,25 @@ module WebDriver
     #
     class Logger
       extend Forwardable
-      include ::Logger::Severity
 
       def_delegators :@logger, :debug, :debug?,
                      :info, :info?,
                      :warn, :warn?,
                      :error, :error?,
                      :fatal, :fatal?,
-                     :level
+                     :level, :level=
 
       def initialize
         @logger = create_logger($stdout)
       end
 
-      def output=(io)
-        # `Logger#reopen` was added in Ruby 2.3
-        if @logger.respond_to?(:reopen)
-          @logger.reopen(io)
-        else
-          @logger = create_logger(io)
-        end
-      end
-
       #
-      # For Ruby < 2.3 compatibility
-      # Based on https://github.com/ruby/ruby/blob/ruby_2_3/lib/logger.rb#L250
+      # Changes logger output to a new IO.
       #
-
-      def level=(severity)
-        if severity.is_a?(Integer)
-          @logger.level = severity
-        else
-          case severity.to_s.downcase
-          when 'debug'
-            @logger.level = DEBUG
-          when 'info'
-            @logger.level = INFO
-          when 'warn'
-            @logger.level = WARN
-          when 'error'
-            @logger.level = ERROR
-          when 'fatal'
-            @logger.level = FATAL
-          when 'unknown'
-            @logger.level = UNKNOWN
-          else
-            raise ArgumentError, "invalid log level: #{severity}"
-          end
-        end
+      # @param [String] io
+      #
+      def output=(io)
+        @logger.reopen(io)
       end
 
       #
@@ -132,9 +103,9 @@ def create_logger(output)
 
       def default_level
         if $DEBUG || ENV.key?('DEBUG')
-          DEBUG
+          :debug
         else
-          WARN
+          :warn
         end
       end
     end # Logger
diff --git a/rb/spec/unit/selenium/webdriver/common/logger_spec.rb b/rb/spec/unit/selenium/webdriver/common/logger_spec.rb
index 16d8f4be620b9..610055fbd2d67 100644
--- a/rb/spec/unit/selenium/webdriver/common/logger_spec.rb
+++ b/rb/spec/unit/selenium/webdriver/common/logger_spec.rb
@@ -32,16 +32,19 @@ module WebDriver
 
       it 'logs warnings by default' do
         expect(WebDriver.logger.level).to eq(2)
+        expect(WebDriver.logger).to be_warn
       end
 
       it 'logs everything if $DEBUG is set to true' do
         $DEBUG = true
         expect(WebDriver.logger.level).to eq(0)
+        expect(WebDriver.logger).to be_debug
       end
 
       it 'allows to change level during execution' do
         WebDriver.logger.level = :info
         expect(WebDriver.logger.level).to eq(1)
+        expect(WebDriver.logger).to be_info
       end
 
       it 'outputs to stdout by default' do