diff --git a/src/System.Runtime/ref/System.Runtime.cs b/src/System.Runtime/ref/System.Runtime.cs
index 09e1bbb70a9e..96e942ac203d 100644
--- a/src/System.Runtime/ref/System.Runtime.cs
+++ b/src/System.Runtime/ref/System.Runtime.cs
@@ -3054,13 +3054,6 @@ public StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind layoutKin
         public System.Runtime.InteropServices.LayoutKind Value { get { return default(System.Runtime.InteropServices.LayoutKind); } }
     }
 }
-namespace System.Runtime.Serialization
-{
-    public static partial class FormatterServices
-    {
-        public static Object GetUninitializedObject(Type type) { return default(Object); }
-    }
-}
 namespace System.Runtime.Versioning
 {
     [System.AttributeUsageAttribute((System.AttributeTargets)(1), AllowMultiple = false, Inherited = false)]
diff --git a/src/System.Runtime/tests/System.Runtime.Tests.csproj b/src/System.Runtime/tests/System.Runtime.Tests.csproj
index 089dfb03c8e7..766a718ee171 100644
--- a/src/System.Runtime/tests/System.Runtime.Tests.csproj
+++ b/src/System.Runtime/tests/System.Runtime.Tests.csproj
@@ -65,7 +65,6 @@
     <Compile Include="System\Runtime\CompilerServices\ConditionalWeakTableTests.cs" />
     <Compile Include="System\Runtime\CompilerServices\StrongBoxTests.cs" />
     <Compile Include="System\Runtime\CompilerServices\RuntimeHelpersTests.cs" />
-    <Compile Include="System\Runtime\Serialization\FormatterServices.cs" />
     <Compile Include="System\SByteTests.cs" />
     <Compile Include="System\SingleTests.cs" />
     <Compile Include="System\StringTests.cs" />
diff --git a/src/System.Runtime/tests/System/Runtime/Serialization/FormatterServices.cs b/src/System.Runtime/tests/System/Runtime/Serialization/FormatterServices.cs
deleted file mode 100644
index 0c765c0d0f86..000000000000
--- a/src/System.Runtime/tests/System/Runtime/Serialization/FormatterServices.cs
+++ /dev/null
@@ -1,90 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.IO;
-using System.Runtime.Serialization;
-using Xunit;
-
-namespace System.Tests
-{
-    public static class FormatterServicesTests
-    {
-        [Fact]
-        public static void NoArgument_Throws_ArgumentNullException()
-        {
-            Assert.Throws<ArgumentNullException>("type", () => FormatterServices.GetUninitializedObject(null));
-        }
-
-        [Theory]
-        [InlineData(typeof(string))]
-        [InlineData(typeof(int*))]
-        public static void StringsAndPointers_Throw_ArgumentException(Type type)
-        {
-            Assert.Throws<ArgumentException>(null /* really should be 'type' */, () => FormatterServices.GetUninitializedObject(type));
-        }
-
-        [Fact]
-        public static void InstantiatedArrays_Throw_ArgumentException()
-        {
-            Assert.Throws<ArgumentException>(null /* really should be 'type' */, () => FormatterServices.GetUninitializedObject((new int[] { }).GetType()));
-        }
-
-        [Theory]
-        [InlineData(typeof(Array))]
-        [InlineData(typeof(ICollection))]
-        [InlineData(typeof(Stream))]
-        public static void InterfacesAndAbstractClasses_Throw_MemberAccessException(Type type)
-        {
-            Assert.Throws<MemberAccessException>(() => FormatterServices.GetUninitializedObject(type));
-        }
-
-        [Theory]
-        [InlineData(typeof(object))]
-        [InlineData(typeof(MyClass))]
-        public static void PlainObjects_Success(Type type)
-        {
-            Assert.Equal(type, FormatterServices.GetUninitializedObject(type).GetType());
-        }
-
-        [Fact]
-        public static void Generic_Success()
-        {
-            var type = typeof(List<int>);
-            Assert.Equal(0, ((List<int>)FormatterServices.GetUninitializedObject(type)).Count);
-            Assert.Equal(type, FormatterServices.GetUninitializedObject(type).GetType());
-        }
-
-        [Theory]
-        [InlineData(typeof(int), 0)]
-        [InlineData(typeof(short), 0)]
-        public static void PrimitiveTypes_Success(Type type, object value)
-        {
-            Assert.Equal(value.ToString(), FormatterServices.GetUninitializedObject(type).ToString());
-            Assert.Equal(type, FormatterServices.GetUninitializedObject(type).GetType());
-        }
-
-        [Fact]
-        public static void Nullable_BecomesNonNullable_Success()
-        {
-            Assert.Equal(typeof(int), FormatterServices.GetUninitializedObject(typeof(int?)).GetType());
-        }
-
-        [Fact]
-        public static void Result_Is_Mutable()
-        {
-            // Sanity check the object is actually useable
-            MyClass mc = ((MyClass)FormatterServices.GetUninitializedObject(typeof(MyClass)));
-            mc.MyMember = "foo";
-            Assert.Equal("foo", mc.MyMember);
-        }
-
-        private class MyClass
-        {
-            public string MyMember { get; set; }
-        }
-    }
-}