diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb
index 059dc8cff3f5e28fcf673d66b275256081439171..e0cde4f7f3c5ecea642a54a8d5327b6ce4dc49ba 100644
--- a/activerecord/test/cases/attribute_methods_test.rb
+++ b/activerecord/test/cases/attribute_methods_test.rb
@@ -12,7 +12,7 @@
 require 'models/keyboard'
 
 class AttributeMethodsTest < ActiveRecord::TestCase
-  include InTimeZome
+  include InTimeZone
 
   fixtures :topics, :developers, :companies, :computers
 
diff --git a/activerecord/test/cases/dirty_test.rb b/activerecord/test/cases/dirty_test.rb
index ac1ab801daa18ce6606063e3d3797d802506fa61..d4fc5f204b8a47893d29ba86165322c03730688b 100644
--- a/activerecord/test/cases/dirty_test.rb
+++ b/activerecord/test/cases/dirty_test.rb
@@ -27,7 +27,7 @@ class NumericData < ActiveRecord::Base
 end
 
 class DirtyTest < ActiveRecord::TestCase
-  include InTimeZome
+  include InTimeZone
 
   # Dummy to force column loads so query counts are clean.
   def setup
diff --git a/activerecord/test/cases/helper.rb b/activerecord/test/cases/helper.rb
index cb1edc46278ec7f74b8ed59cbab45cf269c6018a..1bff0055109d4773f5c20fe134f47b2def15a808 100644
--- a/activerecord/test/cases/helper.rb
+++ b/activerecord/test/cases/helper.rb
@@ -135,7 +135,9 @@ def log(sql, name, binds = [], &block)
   end
 end
 
-module InTimeZome
+module InTimeZone
+  private
+
   def in_time_zone(zone)
     old_zone  = Time.zone
     old_tz    = ActiveRecord::Base.time_zone_aware_attributes