6 files changed, 20 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
index a7a12faac2..7489e88eef 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
@@ -33,8 +33,9 @@ module ActiveRecord
         when BigDecimal then value.to_s('F')
         when Numeric    then value.to_s
         when Date, Time then "'#{quoted_date(value)}'"
+        when Symbol     then "'#{quote_string(value.to_s)}'"
         else
-          "'#{quote_string(value.to_s)}'"
+          "'#{quote_string(value.to_yaml)}'"
         end
       end
 
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index 09ef04a656..594f3b80c6 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -703,7 +703,7 @@ class BasicsTest < ActiveRecord::TestCase
 
     duped_topic.reload
     # FIXME: I think this is poor behavior, and will fix it with #5686
-    assert_equal({'a' => 'c'}.to_s, duped_topic.title)
+    assert_equal({'a' => 'c'}.to_yaml, duped_topic.title)
   end
 
   def test_dup_with_aggregate_of_same_name_as_attribute
diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 9ce163a00f..864a7a2acc 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -13,6 +13,7 @@ require 'models/category'
 require 'models/parrot'
 require 'models/pirate'
 require 'models/treasure'
+require 'models/traffic_light'
 require 'models/matey'
 require 'models/ship'
 require 'models/book'
@@ -24,7 +25,7 @@ class FixturesTest < ActiveRecord::TestCase
   self.use_instantiated_fixtures = true
   self.use_transactional_fixtures = false
 
-  fixtures :topics, :developers, :accounts, :tasks, :categories, :funny_jokes, :binaries
+  fixtures :topics, :developers, :accounts, :tasks, :categories, :funny_jokes, :binaries, :traffic_lights
 
   FIXTURES = %w( accounts binaries companies customers
                  developers developers_projects entrants
@@ -204,6 +205,10 @@ class FixturesTest < ActiveRecord::TestCase
     data.freeze
     assert_equal data, @flowers.data
   end
+
+  def test_serialized_fixtures
+    assert_equal ["Green", "Red", "Orange"], traffic_lights(:uk).state
+  end
 end
 
 if Account.connection.respond_to?(:reset_pk_sequence!)
diff --git a/activerecord/test/cases/quoting_test.rb b/activerecord/test/cases/quoting_test.rb
index 2ef5b5a800..b87fb51d97 100644
--- a/activerecord/test/cases/quoting_test.rb
+++ b/activerecord/test/cases/quoting_test.rb
@@ -154,13 +154,13 @@ module ActiveRecord
       end
 
       def test_crazy_object
-        crazy = Class.new { def to_s; 'lol' end }.new
+        crazy = Class.new { def to_yaml; 'lol' end }.new
         assert_equal "'lol'", @quoter.quote(crazy, nil)
         assert_equal "'lol'", @quoter.quote(crazy, Object.new)
       end
 
       def test_crazy_object_calls_quote_string
-        crazy = Class.new { def to_s; 'lo\l' end }.new
+        crazy = Class.new { def to_yaml; 'lo\l' end }.new
         assert_equal "'lo\\\\l'", @quoter.quote(crazy, nil)
         assert_equal "'lo\\\\l'", @quoter.quote(crazy, Object.new)
       end
diff --git a/activerecord/test/fixtures/traffic_lights.yml b/activerecord/test/fixtures/traffic_lights.yml
new file mode 100644
index 0000000000..6dabd53474
--- /dev/null
+++ b/activerecord/test/fixtures/traffic_lights.yml
@@ -0,0 +1,6 @@
+uk:
+  location: UK
+  state:
+    - Green
+    - Red
+    - Orange
diff --git a/activerecord/test/models/traffic_light.rb b/activerecord/test/models/traffic_light.rb
new file mode 100644
index 0000000000..228f3f7bd4
--- /dev/null
+++ b/activerecord/test/models/traffic_light.rb
@@ -0,0 +1,3 @@
+class TrafficLight < ActiveRecord::Base
+  serialize :state, Array
+end