diff --git a/NewApi.Tests/BaseIsAnInterfaceTests.cs b/NewApi.Tests/BaseIsAnInterfaceTests.cs
index 6b31001..f86a7fb 100644
--- a/NewApi.Tests/BaseIsAnInterfaceTests.cs
+++ b/NewApi.Tests/BaseIsAnInterfaceTests.cs
@@ -51,7 +51,6 @@ public void ConcurrentThreadTest()
         [Test]
         public void UnknownMappingFails()
         {
-            Assert.Fail("Not ready");
             var exception = Assert.Throws<JsonException>(() => JsonSerializer.Deserialize<IAnimal>("{\"Sound\":\"Scream\"}"));
             Assert.AreEqual("Could not create an instance of type JsonSubTypes.Tests.BaseIsAnInterfaceTests+IAnimal. Type is an interface or abstract class and cannot be instantiated. Path 'Sound', line 1, position 9.", exception.Message);
         }
diff --git a/NewApi.Tests/DemoAlternativeTypePropertyNameTests.cs b/NewApi.Tests/DemoAlternativeTypePropertyNameTests.cs
index 560d07b..2c232a2 100644
--- a/NewApi.Tests/DemoAlternativeTypePropertyNameTests.cs
+++ b/NewApi.Tests/DemoAlternativeTypePropertyNameTests.cs
@@ -97,7 +97,6 @@ public void DemoBaseWhenNull()
             [Test]
             public void ArbitraryConstructorShouldNotBeCalled()
             {
-                Assert.Fail("Not ready");
                 Animal deserializeObject = null;
                 try
                 {
diff --git a/NewApi/JsonSubtypes2.cs b/NewApi/JsonSubtypes2.cs
index f3366c5..9490986 100644
--- a/NewApi/JsonSubtypes2.cs
+++ b/NewApi/JsonSubtypes2.cs
@@ -66,7 +66,6 @@ public interface IJsonSubtypes
     }
     public class JsonSubtypes<T> : JsonConverter<T>, IJsonSubtypes
     {
-
         protected readonly string JsonDiscriminatorPropertyName;
 
         public JsonSubtypes()
@@ -203,7 +202,7 @@ private Type GetType(JsonDocument jObject, Type parentType, JsonSerializerOption
         {
             Type targetType = parentType;
             IJsonSubtypes lastTypeResolver = null;
-            IJsonSubtypes currentTypeResolver = currentTypeResolver = GetTypeResolver(ToTypeInfo(targetType), serializer.Converters.OfType<IJsonSubtypes>());
+            IJsonSubtypes currentTypeResolver = GetTypeResolver(ToTypeInfo(targetType), serializer.Converters.OfType<IJsonSubtypes>());
 
             var jsonConverterCollection = serializer.Converters.OfType<IJsonSubtypes>().ToList();
             while (currentTypeResolver != null && currentTypeResolver != lastTypeResolver)
@@ -270,18 +269,15 @@ private static bool TryGetValueInJson(JsonDocument jObject, string propertyName,
                 return true;
             }
 
-            JsonProperty matchingProperty = jObject
+            var objectEnumerator = jObject
                 .RootElement
-                .EnumerateObject()
-                .FirstOrDefault(jsonProperty => string.Equals(jsonProperty.Name, propertyName, StringComparison.OrdinalIgnoreCase));
-
-            if (string.Equals(matchingProperty.Name, propertyName, StringComparison.OrdinalIgnoreCase))
+                .EnumerateObject();
+            foreach (var jsonProperty in objectEnumerator.Where(jsonProperty => string.Equals(jsonProperty.Name, propertyName, StringComparison.OrdinalIgnoreCase)))
             {
-                return false;
+                value = jsonProperty.Value;
+                return true;
             }
-
-            value = matchingProperty.Value;
-            return true;
+            return false;
         }
 
         private static Type GetTypeByName(string typeName, TypeInfo parentType)