diff --git a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj
index 6fe404bd..95c13cd0 100644
--- a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj
+++ b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj
@@ -164,6 +164,7 @@
     <Compile Include="Serialization\DefaultValueHandlingTests.cs" />
     <Compile Include="Serialization\DynamicTests.cs" />
     <Compile Include="Serialization\EntitiesSerializationTests.cs" />
+    <Compile Include="Serialization\ImmutableCollectionsTests.cs" />
     <Compile Include="Serialization\JsonPropertyCollectionTests.cs" />
     <Compile Include="Serialization\JsonSerializerTest.cs" />
     <Compile Include="Serialization\MissingMemberHandlingTests.cs" />
@@ -314,6 +315,11 @@
   <ItemGroup>
     <None Include="Newtonsoft.Json.Tests.WinRT_TemporaryKey.pfx" />
   </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System.Collections.Immutable">
+      <HintPath>..\packages\Microsoft.Bcl.Immutable.1.0.12-beta\lib\portable-net45+win8+wp8\System.Collections.Immutable.dll</HintPath>
+    </Reference>
+  </ItemGroup>
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' ">
     <VisualStudioVersion>11.0</VisualStudioVersion>
   </PropertyGroup>
diff --git a/Src/Newtonsoft.Json.Tests/Serialization/ImmutableCollectionsTests.cs b/Src/Newtonsoft.Json.Tests/Serialization/ImmutableCollectionsTests.cs
index d3f189c5..f35a4d41 100644
--- a/Src/Newtonsoft.Json.Tests/Serialization/ImmutableCollectionsTests.cs
+++ b/Src/Newtonsoft.Json.Tests/Serialization/ImmutableCollectionsTests.cs
@@ -30,7 +30,13 @@ using System.Collections.Immutable;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+#if !NETFX_CORE
 using NUnit.Framework;
+#else
+using Microsoft.VisualStudio.TestPlatform.UnitTestFramework;
+using TestFixture = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestClassAttribute;
+using Test = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestMethodAttribute;
+#endif
 using Newtonsoft.Json.Linq;
 
 namespace Newtonsoft.Json.Tests.Serialization
diff --git a/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs b/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs
index 2fe19961..1c6e9a9c 100644
--- a/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs
+++ b/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs
@@ -175,8 +175,10 @@ namespace Newtonsoft.Json.Tests.Serialization
       serializer.ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor;
       Assert.AreEqual(ConstructorHandling.AllowNonPublicDefaultConstructor, serializer.ConstructorHandling);
 
+#if !NETFX_CORE
       serializer.Context = new StreamingContext(StreamingContextStates.Other);
       Assert.AreEqual(new StreamingContext(StreamingContextStates.Other), serializer.Context);
+#endif
 
       CamelCasePropertyNamesContractResolver resolver = new CamelCasePropertyNamesContractResolver();
       serializer.ContractResolver = resolver;
@@ -265,8 +267,10 @@ namespace Newtonsoft.Json.Tests.Serialization
       settings.ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor;
       Assert.AreEqual(ConstructorHandling.AllowNonPublicDefaultConstructor, settings.ConstructorHandling);
 
+#if !NETFX_CORE
       settings.Context = new StreamingContext(StreamingContextStates.Other);
       Assert.AreEqual(new StreamingContext(StreamingContextStates.Other), settings.Context);
+#endif
 
       CamelCasePropertyNamesContractResolver resolver = new CamelCasePropertyNamesContractResolver();
       settings.ContractResolver = resolver;
@@ -355,8 +359,10 @@ namespace Newtonsoft.Json.Tests.Serialization
       serializerProxy.ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor;
       Assert.AreEqual(ConstructorHandling.AllowNonPublicDefaultConstructor, serializerProxy.ConstructorHandling);
 
+#if !NETFX_CORE
       serializerProxy.Context = new StreamingContext(StreamingContextStates.Other);
       Assert.AreEqual(new StreamingContext(StreamingContextStates.Other), serializerProxy.Context);
+#endif
 
       CamelCasePropertyNamesContractResolver resolver = new CamelCasePropertyNamesContractResolver();
       serializerProxy.ContractResolver = resolver;
diff --git a/Src/Newtonsoft.Json/Newtonsoft.Json.WinRT.csproj b/Src/Newtonsoft.Json/Newtonsoft.Json.WinRT.csproj
index 9f567606..2f51c402 100644
--- a/Src/Newtonsoft.Json/Newtonsoft.Json.WinRT.csproj
+++ b/Src/Newtonsoft.Json/Newtonsoft.Json.WinRT.csproj
@@ -275,6 +275,7 @@
     <Compile Include="Utilities\EnumValues.cs" />
     <Compile Include="Utilities\ExpressionReflectionDelegateFactory.cs" />
     <Compile Include="Utilities\ILGeneratorExtensions.cs" />
+    <Compile Include="Utilities\ImmutableCollectionsUtils.cs" />
     <Compile Include="Utilities\JavaScriptUtils.cs" />
     <Compile Include="Utilities\LateBoundReflectionDelegateFactory.cs" />
     <Compile Include="Utilities\LinqBridge.cs" />