diff --git a/actionpack/lib/action_view/helpers/translation_helper.rb b/actionpack/lib/action_view/helpers/translation_helper.rb
index 2772aa90861fb..945c56fa95de0 100644
--- a/actionpack/lib/action_view/helpers/translation_helper.rb
+++ b/actionpack/lib/action_view/helpers/translation_helper.rb
@@ -40,7 +40,11 @@ def translate(keys, options = {})
 
             html_safe_options[:default] = MISSING_TRANSLATION unless html_safe_options[:default].blank?
 
-            translation = I18n.translate(qualified_key, html_safe_options)
+            translation = if RUBY_VERSION >= "2.7"
+                            I18n.translate(qualified_key, **html_safe_options)
+                          else
+                            I18n.translate(qualified_key, html_safe_options)
+                          end
 
             if translation.equal?(MISSING_TRANSLATION)
               options[:default].first
@@ -48,7 +52,11 @@ def translate(keys, options = {})
               translation.respond_to?(:html_safe) ? translation.html_safe : translation
             end
           else
-            I18n.translate(qualified_key, options)
+            if RUBY_VERSION >= "2.7"
+              I18n.translate(qualified_key, **options)
+            else
+              I18n.translate(qualified_key, options)
+            end
           end
         end
 
@@ -71,8 +79,14 @@ def translate(keys, options = {})
       alias :t :translate
 
       # Delegates to I18n.localize with no additional functionality.
-      def localize(*args)
-        I18n.localize(*args)
+      if RUBY_VERSION >= "2.7"
+        def localize(...)
+          I18n.localize(...)
+        end
+      else
+        def localize(*args)
+          I18n.localize(*args)
+        end
       end
       alias :l :localize
 
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 5e176c1fe96e9..93e242a8b7bee 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1435,7 +1435,17 @@ def human_attribute_name(attribute_key_name, options = {})
         defaults.flatten!
         defaults << attribute_key_name.to_s.humanize
         options[:count] ||= 1
-        I18n.translate(defaults.shift, options.merge(:default => defaults, :scope => [:activerecord, :attributes]))
+        if RUBY_VERSION >= '2.7'
+          I18n.translate(
+            defaults.shift,
+            **options.merge(:default => defaults, :scope => [:activerecord, :attributes])
+          )
+        else
+          I18n.translate(
+            defaults.shift,
+            options.merge(:default => defaults, :scope => [:activerecord, :attributes])
+          )
+        end
       end
 
       # Transform the modelname into a more humane format, using I18n.
@@ -1447,7 +1457,17 @@ def human_name(options = {})
           :"#{klass.name.underscore}" if klass.name.present?
         end.compact
         defaults << self.name.humanize if self.name.present?
-        I18n.translate(defaults.shift, {:scope => [:activerecord, :models], :count => 1, :default => defaults}.merge(options))
+        if RUBY_VERSION >= '2.7'
+          I18n.translate(
+            defaults.shift,
+            **{:scope => [:activerecord, :models], :count => 1, :default => defaults}.merge(options)
+          )
+        else
+          I18n.translate(
+            defaults.shift,
+            {:scope => [:activerecord, :models], :count => 1, :default => defaults}.merge(options)
+          )
+        end
       end
 
       # True if this isn't a concrete subclass needing a STI type condition.
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index 26d82d4ea153d..e3d2150ba0bcd 100644
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -79,7 +79,11 @@ def generate_message(options = {})
         keys.compact!
 
         options.merge!(:default => keys)
-        I18n.translate(keys.shift, options)
+        if RUBY_VERSION >= '2.7'
+          I18n.translate(keys.shift, **options)
+        else
+          I18n.translate(keys.shift, options)
+        end
       end
 
       # Wraps an error message into a full_message format.
@@ -117,7 +121,11 @@ def generate_full_message(options = {})
         ]
 
         options.merge!(:default => keys, :message => self.message)
-        I18n.translate(keys.shift, options)
+        if RUBY_VERSION >= '2.7'
+          I18n.translate(keys.shift, **options)
+        else
+          I18n.translate(keys.shift, options)
+        end
       end
 
       # Return user options with default options.
diff --git a/activesupport/lib/active_support/option_merger.rb b/activesupport/lib/active_support/option_merger.rb
index 63662b75c7496..cefb003c502d6 100644
--- a/activesupport/lib/active_support/option_merger.rb
+++ b/activesupport/lib/active_support/option_merger.rb
@@ -10,14 +10,32 @@ def initialize(context, options)
 
     private
       def method_missing(method, *arguments, &block)
+        options = nil
         if arguments.last.is_a?(Proc)
           proc = arguments.pop
           arguments << lambda { |*args| @options.deep_merge(proc.call(*args)) }
+        elsif arguments.last.respond_to?(:to_hash)
+          options = @options.deep_merge(arguments.pop)
         else
-          arguments << (arguments.last.respond_to?(:to_hash) ? @options.deep_merge(arguments.pop) : @options.dup)
+          options = @options
         end
 
-        @context.__send__(method, *arguments, &block)
+        invoke_method(method, arguments, options, &block)
+      end
+
+      if RUBY_VERSION >= "2.7"
+        def invoke_method(method, arguments, options, &block)
+          if options
+            @context.__send__(method, *arguments, **options, &block)
+          else
+            @context.__send__(method, *arguments, &block)
+          end
+        end
+      else
+        def invoke_method(method, arguments, options, &block)
+          arguments << options.dup if options
+          @context.__send__(method, *arguments, &block)
+        end
       end
   end
 end