diff --git a/activesupport/test/multibyte_conformance_test.rb b/activesupport/test/multibyte_conformance_test.rb
index d493a48fe4..5df8f32e46 100644
--- a/activesupport/test/multibyte_conformance_test.rb
+++ b/activesupport/test/multibyte_conformance_test.rb
@@ -5,25 +5,25 @@ require 'fileutils'
 require 'open-uri'
 require 'tmpdir'
 
-class Downloader
-  def self.download(from, to)
-    unless File.exist?(to)
-      unless File.exist?(File.dirname(to))
-        system "mkdir -p #{File.dirname(to)}"
-      end
-      open(from) do |source|
-        File.open(to, 'w') do |target|
-          source.each_line do |l|
-            target.write l
+class MultibyteConformanceTest < ActiveSupport::TestCase
+  class Downloader
+    def self.download(from, to)
+      unless File.exist?(to)
+        unless File.exist?(File.dirname(to))
+          system "mkdir -p #{File.dirname(to)}"
+        end
+        open(from) do |source|
+          File.open(to, 'w') do |target|
+            source.each_line do |l|
+              target.write l
+            end
           end
         end
       end
+      true
     end
-    true
   end
-end
 
-class MultibyteConformanceTest < ActiveSupport::TestCase
   include MultibyteTestHelpers
 
   UNIDATA_URL = "http://www.unicode.org/Public/#{ActiveSupport::Multibyte::Unicode::UNICODE_VERSION}/ucd"
diff --git a/activesupport/test/multibyte_grapheme_break_conformance_test.rb b/activesupport/test/multibyte_grapheme_break_conformance_test.rb
index 8ebbcac9e9..229f24990e 100644
--- a/activesupport/test/multibyte_grapheme_break_conformance_test.rb
+++ b/activesupport/test/multibyte_grapheme_break_conformance_test.rb
@@ -6,25 +6,25 @@ require 'fileutils'
 require 'open-uri'
 require 'tmpdir'
 
-class Downloader
-  def self.download(from, to)
-    unless File.exist?(to)
-      $stderr.puts "Downloading #{from} to #{to}"
-      unless File.exist?(File.dirname(to))
-        system "mkdir -p #{File.dirname(to)}"
-      end
-      open(from) do |source|
-        File.open(to, 'w') do |target|
-          source.each_line do |l|
-            target.write l
+class MultibyteGraphemeBreakConformanceTest < ActiveSupport::TestCase
+  class Downloader
+    def self.download(from, to)
+      unless File.exist?(to)
+        $stderr.puts "Downloading #{from} to #{to}"
+        unless File.exist?(File.dirname(to))
+          system "mkdir -p #{File.dirname(to)}"
+        end
+        open(from) do |source|
+          File.open(to, 'w') do |target|
+            source.each_line do |l|
+              target.write l
+            end
           end
         end
       end
     end
   end
-end
 
-class MultibyteGraphemeBreakConformanceTest < ActiveSupport::TestCase
   TEST_DATA_URL = "http://www.unicode.org/Public/#{ActiveSupport::Multibyte::Unicode::UNICODE_VERSION}/ucd/auxiliary"
   TEST_DATA_FILE = '/GraphemeBreakTest.txt'
   CACHE_DIR = File.join(Dir.tmpdir, 'cache')
diff --git a/activesupport/test/multibyte_normalization_conformance_test.rb b/activesupport/test/multibyte_normalization_conformance_test.rb
index 38765b7b32..8bc91ef708 100644
--- a/activesupport/test/multibyte_normalization_conformance_test.rb
+++ b/activesupport/test/multibyte_normalization_conformance_test.rb
@@ -7,25 +7,25 @@ require 'fileutils'
 require 'open-uri'
 require 'tmpdir'
 
-class Downloader
-  def self.download(from, to)
-    unless File.exist?(to)
-      $stderr.puts "Downloading #{from} to #{to}"
-      unless File.exist?(File.dirname(to))
-        system "mkdir -p #{File.dirname(to)}"
-      end
-      open(from) do |source|
-        File.open(to, 'w') do |target|
-          source.each_line do |l|
-            target.write l
+class MultibyteNormalizationConformanceTest < ActiveSupport::TestCase
+  class Downloader
+    def self.download(from, to)
+      unless File.exist?(to)
+        $stderr.puts "Downloading #{from} to #{to}"
+        unless File.exist?(File.dirname(to))
+          system "mkdir -p #{File.dirname(to)}"
+        end
+        open(from) do |source|
+          File.open(to, 'w') do |target|
+            source.each_line do |l|
+              target.write l
+            end
           end
         end
       end
     end
   end
-end
 
-class MultibyteNormalizationConformanceTest < ActiveSupport::TestCase
   include MultibyteTestHelpers
 
   UNIDATA_URL = "http://www.unicode.org/Public/#{ActiveSupport::Multibyte::Unicode::UNICODE_VERSION}/ucd"