diff --git a/ChangeLog b/ChangeLog
index 44c12001a6..b4d13db4c0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Mon Feb 21 10:01:01 2011  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* ext/psych/lib/psych/json/stream.rb: fix JSON stream emits to use
+	  double quotes during stream.
+	* test/psych/json/test_stream.rb: tests to reflect changes.
+
 Mon Feb 21 00:38:56 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* test/ruby/test_system.rb (TestSystem#test_system_at):
diff --git a/ext/psych/lib/psych/json/stream.rb b/ext/psych/lib/psych/json/stream.rb
index a6da584cbf..b240b6cbdb 100644
--- a/ext/psych/lib/psych/json/stream.rb
+++ b/ext/psych/lib/psych/json/stream.rb
@@ -23,8 +23,17 @@ module Psych
         end
       end
 
+      def visit_Time o
+        formatted = format_time o
+        @emitter.scalar formatted, nil, nil, false, true, Nodes::Scalar::DOUBLE_QUOTED
+      end
+
+      def visit_DateTime o
+        visit_Time o.to_time
+      end
+
       def visit_String o
-        @emitter.scalar o.to_s, nil, nil, false, true, Nodes::Scalar::ANY
+        @emitter.scalar o.to_s, nil, nil, false, true, Nodes::Scalar::DOUBLE_QUOTED
       end
       alias :visit_Symbol :visit_String
     end
diff --git a/test/psych/json/test_stream.rb b/test/psych/json/test_stream.rb
index 712465d4c0..252535abaa 100644
--- a/test/psych/json/test_stream.rb
+++ b/test/psych/json/test_stream.rb
@@ -31,12 +31,12 @@ module Psych
 
       def test_string
         @stream.push "foo"
-        assert_match(/(['"])foo\1/, @io.string)
+        assert_match(/(["])foo\1/, @io.string)
       end
 
       def test_symbol
         @stream.push :foo
-        assert_match(/(['"])foo\1/, @io.string)
+        assert_match(/(["])foo\1/, @io.string)
       end
 
       def test_int
@@ -56,8 +56,8 @@ module Psych
         json = @io.string
         assert_match(/}$/, json)
         assert_match(/^--- \{/, json)
-        assert_match(/['"]one['"]/, json)
-        assert_match(/['"]two['"]/, json)
+        assert_match(/["]one['"]/, json)
+        assert_match(/["]two['"]/, json)
       end
 
       def test_list_to_json
@@ -67,8 +67,22 @@ module Psych
         json = @io.string
         assert_match(/]$/, json)
         assert_match(/^--- \[/, json)
-        assert_match(/['"]one['"]/, json)
-        assert_match(/['"]two['"]/, json)
+        assert_match(/["]one["]/, json)
+        assert_match(/["]two["]/, json)
+      end
+
+      def test_time
+        time = Time.utc(2010, 10, 10)
+        @stream.push({'a' => time })
+        json = @io.string
+        assert_match "{\"a\": \"2010-10-10 00:00:00.000000000Z\"}\n", json
+      end
+
+      def test_datetime
+        time = Time.new(2010, 10, 10).to_datetime
+        @stream.push({'a' => time })
+        json = @io.string
+        assert_match "{\"a\": \"#{time.strftime("%Y-%m-%d %H:%M:%S.%9N %:z")}\"}\n", json
       end
     end
   end