-nomethod System.Tests.EnvironmentTests.FailFast_ExceptionStackTrace_StackOverflowException
-nomethod System.Tests.EnvironmentTests.FailFast_ExceptionStackTrace_InnerException
-nomethod System.Tests.EnvironmentTests.FailFast_ExceptionStackTrace_ArgumentException
+
+# requires corefx test updates: https://github.com/dotnet/corefx/pull/38269
+-nomethod System.Reflection.Emit.Tests.DynamicMethodctor1.String_Type_TypeArray_Module
+-nomethod System.Reflection.Emit.Tests.DynamicMethodctor1.String_Type_TypeArray_Type
+-nomethod System.Reflection.Emit.Tests.MethodBuilderGetGenericArguments.GetGenericArguments_NonGenericMethod_ReturnsNull
+-nomethod System.Reflection.Emit.Tests.MethodBuilderSetReturnType.SetReturnType_NullReturnType_ReturnsVoid
+-nomethod System.Reflection.Emit.Tests.MethodBuilderSetSignature.SetSignature_AllParametersNull
+-nomethod System.Reflection.Emit.Tests.MethodBuilderSetSignature.SetSignature_NullReturnType_CustomModifiersSetToWrongTypes
+-nomethod System.Reflection.Emit.Tests.TypeBuilderDefineMethodTests.DefineMethod
+-nomethod System.Tests.StringTests.CasingNegativeTest
+-nomethod System.Tests.StringTests.CompareNegativeTest
+-nomethod System.Tests.StringTests.ToLowerNullCulture
+-nomethod System.Tests.StringTests.ToUpperNullCulture