diff --git a/Src/Newtonsoft.Json.Tests/Bson/BsonReaderTests.cs b/Src/Newtonsoft.Json.Tests/Bson/BsonReaderTests.cs
index bdda8102..cd7bfcee 100644
--- a/Src/Newtonsoft.Json.Tests/Bson/BsonReaderTests.cs
+++ b/Src/Newtonsoft.Json.Tests/Bson/BsonReaderTests.cs
@@ -55,6 +55,7 @@ namespace Newtonsoft.Json.Tests.Bson
     {
         private const char Euro = '\u20ac';
 
+#if !NETFX_CORE
         [Test]
         public void DeserializeLargeBsonObject()
         {
@@ -67,6 +68,7 @@ namespace Newtonsoft.Json.Tests.Bson
 
             Assert.AreEqual("1", (string)o["$id"]);
         }
+#endif
 
         [Test]
         public void CloseInput()
diff --git a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj
index 21a64178..5b53dd1b 100644
--- a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj
+++ b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.WinRT.csproj
@@ -371,6 +371,9 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="Newtonsoft.Json.Tests.WinRT_TemporaryKey.pfx" />
+    <Content Include="SpaceShipV2.bson">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System.Collections.Immutable">
diff --git a/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs b/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs
index 9ca9331a..4db0d7a2 100644
--- a/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs
+++ b/Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs
@@ -7473,7 +7473,9 @@ To fix this error either change the environment to be fully trusted, change the
         }
 #endif
 
+#if !NETFX_CORE
         [Serializable]
+#endif
         [DataContract]
         public struct Pair<TFirst, TSecond>
         {
diff --git a/Src/Newtonsoft.Json.Tests/TestFixtureBase.cs b/Src/Newtonsoft.Json.Tests/TestFixtureBase.cs
index b2971e58..2fa8666c 100644
--- a/Src/Newtonsoft.Json.Tests/TestFixtureBase.cs
+++ b/Src/Newtonsoft.Json.Tests/TestFixtureBase.cs
@@ -164,18 +164,23 @@ namespace Newtonsoft.Json.Tests
 
         public static void Contains(IList collection, object value)
         {
+            Contains(collection, value, null);
+        }
+
+        public static void Contains(IList collection, object value, string message)
+        {
 #if !NETFX_CORE
-            Assert.Contains(value, collection);
+            Assert.Contains(value, collection, message);
 #else
             if (!collection.Cast<object>().Any(i => i.Equals(value)))
-                throw new Exception("Value not found in collection.");
+                throw new Exception(message ?? "Value not found in collection.");
 #endif
         }
     }
 
     public static class StringAssert
     {
-        private readonly static Regex Regex = new Regex(@"\r\n|\n\r|\n|\r", RegexOptions.CultureInvariant | RegexOptions.Compiled);
+        private readonly static Regex Regex = new Regex(@"\r\n|\n\r|\n|\r", RegexOptions.CultureInvariant);
 
         public static void AreEqual(string expected, string actual)
         {
@@ -222,7 +227,8 @@ namespace Newtonsoft.Json.Tests
             }
             catch (TException ex)
             {
-                Assert.Contains (ex.Message, possibleMessages, "Unexpected exception message." + Environment.NewLine + "Expected One of: " + string.Join (Environment.NewLine, possibleMessages) + Environment.NewLine + "Got: " + ex.Message + Environment.NewLine + Environment.NewLine + ex);
+                if (possibleMessages != null && possibleMessages.Length > 0)
+                    CustomAssert.Contains(possibleMessages, ex.Message, "Unexpected exception message." + Environment.NewLine + "Expected one of: " + string.Join(Environment.NewLine, possibleMessages) + Environment.NewLine + "Got: " + ex.Message + Environment.NewLine + Environment.NewLine + ex);
             }
             catch (Exception ex)
             {