diff --git a/Src/Newtonsoft.Json.Tests/Converters/JsonValueConverterTests.cs b/Src/Newtonsoft.Json.Tests/Converters/JsonValueConverterTests.cs
index 5520ff77..d32d90d1 100644
--- a/Src/Newtonsoft.Json.Tests/Converters/JsonValueConverterTests.cs
+++ b/Src/Newtonsoft.Json.Tests/Converters/JsonValueConverterTests.cs
@@ -259,15 +259,15 @@ namespace Newtonsoft.Json.Tests.Converters
       string json = JsonConvert.SerializeObject(o, Formatting.Indented);
 
       Assert.AreEqual(@"{
-  ""PositiveInfinity"": Infinity,
-  ""NegativeInfinity"": -Infinity,
+  ""PositiveInfinity"": ""Infinity"",
+  ""NegativeInfinity"": ""-Infinity"",
   ""MinValue"": -1.7976931348623157E+308,
   ""double"": 1.1,
   ""int"": 1,
   ""zero"": 0,
   ""Epsilon"": 4.94065645841247E-324,
   ""MaxValue"": 1.7976931348623157E+308,
-  ""NaN"": NaN,
+  ""NaN"": ""NaN"",
   ""smallfraction"": 3.0000000000000009,
   ""probablyint"": 1
 }", json);
diff --git a/Src/Newtonsoft.Json.Tests/JsonTextReaderTest.cs b/Src/Newtonsoft.Json.Tests/JsonTextReaderTest.cs
index 548990b4..17e64124 100644
--- a/Src/Newtonsoft.Json.Tests/JsonTextReaderTest.cs
+++ b/Src/Newtonsoft.Json.Tests/JsonTextReaderTest.cs
@@ -1278,17 +1278,17 @@ bye", reader.Value);
       jsonReader.Read();
       Assert.AreEqual(JsonToken.Integer, jsonReader.TokenType);
       Assert.AreEqual(typeof(long), jsonReader.ValueType);
-      Assert.AreEqual(250, jsonReader.Value);
+      Assert.AreEqual((long)250, (long)jsonReader.Value);
 
       jsonReader.Read();
       Assert.AreEqual(JsonToken.Integer, jsonReader.TokenType);
       Assert.AreEqual(typeof(long), jsonReader.ValueType);
-      Assert.AreEqual(250, jsonReader.Value);
+      Assert.AreEqual((long)250, (long)jsonReader.Value);
 
       jsonReader.Read();
       Assert.AreEqual(JsonToken.Integer, jsonReader.TokenType);
       Assert.AreEqual(typeof(long), jsonReader.ValueType);
-      Assert.AreEqual(250, jsonReader.Value);
+      Assert.AreEqual((long)250, (long)jsonReader.Value);
 
       Assert.IsTrue(jsonReader.Read());
       Assert.AreEqual(JsonToken.EndArray, jsonReader.TokenType);
diff --git a/Src/Newtonsoft.Json.Tests/Linq/JTokenTests.cs b/Src/Newtonsoft.Json.Tests/Linq/JTokenTests.cs
index 206454fa..49b36c24 100644
--- a/Src/Newtonsoft.Json.Tests/Linq/JTokenTests.cs
+++ b/Src/Newtonsoft.Json.Tests/Linq/JTokenTests.cs
@@ -315,7 +315,7 @@ namespace Newtonsoft.Json.Tests.Linq
       Assert.AreEqual(new Uri("http://www.google.com"), (Uri)(new JValue(new Uri("http://www.google.com"))));
       Assert.AreEqual(null, (Uri)(new JValue((object)null)));
       Assert.AreEqual(Convert.ToBase64String(Encoding.UTF8.GetBytes("hi")), (string)(new JValue(Encoding.UTF8.GetBytes("hi"))));
-      Assert.AreEqual(Encoding.UTF8.GetBytes("hi"), (byte[])(new JValue(Convert.ToBase64String(Encoding.UTF8.GetBytes("hi")))));
+      CollectionAssert.AreEquivalent((byte[])Encoding.UTF8.GetBytes("hi"), (byte[])(new JValue(Convert.ToBase64String(Encoding.UTF8.GetBytes("hi")))));
 
       Assert.AreEqual(null, (Uri)(JValue)null);
       Assert.AreEqual(null, (int?)(JValue)null);
diff --git a/Src/Newtonsoft.Json/Serialization/DefaultContractResolver.cs b/Src/Newtonsoft.Json/Serialization/DefaultContractResolver.cs
index 97e160f5..ced6152f 100644
--- a/Src/Newtonsoft.Json/Serialization/DefaultContractResolver.cs
+++ b/Src/Newtonsoft.Json/Serialization/DefaultContractResolver.cs
@@ -562,7 +562,7 @@ namespace Newtonsoft.Json.Serialization
       {
 #if NETFX_CORE
         if (!t.IsGenericType() || (t.GetGenericTypeDefinition() != typeof(ConcurrentDictionary<,>)))
-          contract.OnSerializingMethods = onSerializing;
+          contract.OnSerializingMethods.AddRange(onSerializing);
 #else
         contract.OnSerializingMethods.AddRange(onSerializing);
 #endif