diff --git a/Src/Newtonsoft.Json.Tests/Converters/XmlNodeConverterTest.cs b/Src/Newtonsoft.Json.Tests/Converters/XmlNodeConverterTest.cs
index 59538f5c..15a29bf1 100644
--- a/Src/Newtonsoft.Json.Tests/Converters/XmlNodeConverterTest.cs
+++ b/Src/Newtonsoft.Json.Tests/Converters/XmlNodeConverterTest.cs
@@ -2672,7 +2672,7 @@ namespace Newtonsoft.Json.Tests.Converters
         }
 
         [Test]
-        public void SerializeExplicitAttributeNamespace()
+        public void SerializeElementExplicitAttributeNamespace()
         {
             var original = XElement.Parse("<MyElement xmlns=\"http://example.com\" />");
             Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", original.ToString());
@@ -2685,7 +2685,7 @@ namespace Newtonsoft.Json.Tests.Converters
         }
 
         [Test]
-        public void SerializeImplicitAttributeNamespace()
+        public void SerializeElementImplicitAttributeNamespace()
         {
             var original = new XElement("{http://example.com}MyElement");
             Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", original.ToString());
@@ -2696,6 +2696,32 @@ namespace Newtonsoft.Json.Tests.Converters
             var deserialized = JsonConvert.DeserializeObject<XElement>(json);
             Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", deserialized.ToString());
         }
+
+        [Test]
+        public void SerializeDocumentExplicitAttributeNamespace()
+        {
+            var original = XDocument.Parse("<MyElement xmlns=\"http://example.com\" />");
+            Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", original.ToString());
+
+            var json = JsonConvert.SerializeObject(original);
+            Assert.AreEqual(@"{""MyElement"":{""@xmlns"":""http://example.com""}}", json);
+
+            var deserialized = JsonConvert.DeserializeObject<XDocument>(json);
+            Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", deserialized.ToString());
+        }
+
+        [Test]
+        public void SerializeDocumentImplicitAttributeNamespace()
+        {
+            var original = new XDocument(new XElement("{http://example.com}MyElement"));
+            Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", original.ToString());
+
+            var json = JsonConvert.SerializeObject(original);
+            Assert.AreEqual(@"{""MyElement"":{""@xmlns"":""http://example.com""}}", json);
+
+            var deserialized = JsonConvert.DeserializeObject<XDocument>(json);
+            Assert.AreEqual(@"<MyElement xmlns=""http://example.com"" />", deserialized.ToString());
+        }
 #endif
     }
 }