diff --git a/test/Microsoft.AspNet.Mvc.FunctionalTests/SerializableErrorTests.cs b/test/Microsoft.AspNet.Mvc.FunctionalTests/SerializableErrorTests.cs
index 93bbd2b4e0..6d6d6170a3 100644
--- a/test/Microsoft.AspNet.Mvc.FunctionalTests/SerializableErrorTests.cs
+++ b/test/Microsoft.AspNet.Mvc.FunctionalTests/SerializableErrorTests.cs
@@ -20,7 +20,9 @@ namespace Microsoft.AspNet.Mvc.FunctionalTests
         private readonly Action<IApplicationBuilder> _app = new XmlFormattersWebSite.Startup().Configure;
 
         [Theory]
+#if !ASPNETCORE50
         [InlineData("application/xml-xmlser")]
+#endif
         [InlineData("application/xml-dcs")]
         public async Task ModelStateErrors_AreSerialized(string acceptHeader)
         {
@@ -43,7 +45,9 @@ namespace Microsoft.AspNet.Mvc.FunctionalTests
         }
 
         [Theory]
+#if !ASPNETCORE50
         [InlineData("application/xml-xmlser")]
+#endif
         [InlineData("application/xml-dcs")]
         public async Task PostedSerializableError_IsBound(string acceptHeader)
         {
diff --git a/test/Microsoft.AspNet.Mvc.FunctionalTests/XmlSerializerFormattersWrappingTest.cs b/test/Microsoft.AspNet.Mvc.FunctionalTests/XmlSerializerFormattersWrappingTest.cs
index 73d46eb2aa..f96be90395 100644
--- a/test/Microsoft.AspNet.Mvc.FunctionalTests/XmlSerializerFormattersWrappingTest.cs
+++ b/test/Microsoft.AspNet.Mvc.FunctionalTests/XmlSerializerFormattersWrappingTest.cs
@@ -178,6 +178,7 @@ namespace Microsoft.AspNet.Mvc.FunctionalTests
                 result);
         }
 
+#if !ASPNETCORE50
         [Fact]
         public async Task CanWrite_IEnumerableOf_SerializableErrors()
         {
@@ -199,5 +200,6 @@ namespace Microsoft.AspNet.Mvc.FunctionalTests
                 "<key4>key2-error</key4></SerializableErrorWrapper></ArrayOfSerializableErrorWrapper>",
                 result);
         }
+#endif
     }
 }
\ No newline at end of file