diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb
index c553e95bad59febbaf944e40b286b5cf6af09115..59a7bc1da14a023f12089e02e715faeef9c5d1e6 100644
--- a/activerecord/lib/active_record/autosave_association.rb
+++ b/activerecord/lib/active_record/autosave_association.rb
@@ -243,7 +243,7 @@ def nested_records_changed_for_autosave?
           if [:belongs_to, :has_one].include?(reflection.macro)
             return true if association.target && association.target.changed_for_autosave?
           else
-            association.target.each {|record| return true if record.changed_for_autosave? }
+            return true if association.target.detect { |record| record.changed_for_autosave? }
           end
         end
       end
diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb
index 063f0f0fb2ba8a4ffe826e861bac92e29fa76913..4e4f9c385ca68bfa8870942da8d7ac59925ffd20 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -1149,7 +1149,7 @@ def setup
   include AutosaveAssociationOnACollectionAssociationTests
 end
 
-class TestAutosaveAssociationValidationsOnAHasManyAssocication < ActiveRecord::TestCase
+class TestAutosaveAssociationValidationsOnAHasManyAssociation < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
 
   def setup
@@ -1165,7 +1165,7 @@ def setup
   end
 end
 
-class TestAutosaveAssociationValidationsOnAHasOneAssocication < ActiveRecord::TestCase
+class TestAutosaveAssociationValidationsOnAHasOneAssociation < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
 
   def setup
@@ -1186,7 +1186,7 @@ def setup
   end
 end
 
-class TestAutosaveAssociationValidationsOnABelongsToAssocication < ActiveRecord::TestCase
+class TestAutosaveAssociationValidationsOnABelongsToAssociation < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
 
   def setup
@@ -1206,7 +1206,7 @@ def setup
   end
 end
 
-class TestAutosaveAssociationValidationsOnAHABTMAssocication < ActiveRecord::TestCase
+class TestAutosaveAssociationValidationsOnAHABTMAssociation < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
 
   def setup
diff --git a/activerecord/test/cases/nested_attributes_test.rb b/activerecord/test/cases/nested_attributes_test.rb
index 57b66fb3121db602ee41543dfde9247d23090ab9..685b11cb0373018e95b9ad79f7dc17a2dd3fd22c 100644
--- a/activerecord/test/cases/nested_attributes_test.rb
+++ b/activerecord/test/cases/nested_attributes_test.rb
@@ -734,7 +734,7 @@ def test_should_update_existing_records_with_non_standard_primary_key
   end
 end
 
-class TestHasOneAutosaveAssoictaionWhichItselfHasAutosaveAssociations < ActiveRecord::TestCase
+class TestHasOneAutosaveAssociationWhichItselfHasAutosaveAssociations < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
 
   def setup
@@ -774,7 +774,7 @@ def setup
   end
 end
 
-class TestHasManyAutosaveAssoictaionWhichItselfHasAutosaveAssociations < ActiveRecord::TestCase
+class TestHasManyAutosaveAssociationWhichItselfHasAutosaveAssociations < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
 
   def setup