diff --git a/ICSharpCode.Decompiler.Tests/Helpers/TypeSystemHelper.cs b/ICSharpCode.Decompiler.Tests/Helpers/TypeSystemHelper.cs
deleted file mode 100644
index 61497a4ee..000000000
--- a/ICSharpCode.Decompiler.Tests/Helpers/TypeSystemHelper.cs
+++ /dev/null
@@ -1,112 +0,0 @@
-// Copyright (c) 2015 Daniel Grunwald
-// 
-// Permission is hereby granted, free of charge, to any person obtaining a copy of this
-// software and associated documentation files (the "Software"), to deal in the Software
-// without restriction, including without limitation the rights to use, copy, modify, merge,
-// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
-// to whom the Software is furnished to do so, subject to the following conditions:
-// 
-// The above copyright notice and this permission notice shall be included in all copies or
-// substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
-// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
-// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
-// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-using System;
-using System.Linq;
-using System.Reflection;
-using ICSharpCode.Decompiler.TypeSystem;
-using Mono.Cecil;
-
-namespace ICSharpCode.Decompiler.Tests.Helpers
-{
-	/// <summary>
-	/// Helper class for building NRefactory type systems in test cases.
-	/// </summary>
-	public static class TypeSystem
-	{
-		static readonly Lazy<DecompilerTypeSystem> decompilerTypeSystem = new Lazy<DecompilerTypeSystem>(
-			delegate {
-				using (var module = new PEReader(new FileS tream(typeof(TypeSystem).Module.FullyQualifiedName))) {
-					return new DecompilerTypeSystem(module);
-				}
-			});
-		
-		public static DecompilerTypeSystem Instance {
-			get { return decompilerTypeSystem.Value; }
-		}
-		
-		public static IAssembly FromReflection(Assembly assembly)
-		{
-			return decompilerTypeSystem.Value.Compilation.Assemblies.Single(asm => asm.AssemblyName == assembly.GetName().Name);
-		}
-		
-		public static IType FromReflection(Type type)
-		{
-			return decompilerTypeSystem.Value.Compilation.FindType(type);
-		}
-		
-		/// <summary>
-		/// Retrieves a static method that returns void and takes the specified parameter types.
-		/// </summary>
-		public static IMethod Action<T1>()
-		{
-			return Action(typeof(T1));
-		}
-		
-		/// <summary>
-		/// Retrieves a static method that returns void and takes the specified parameter types.
-		/// </summary>
-		public static IMethod Action<T1, T2>()
-		{
-			return Action(typeof(T1), typeof(T2));
-		}
-		
-		/// <summary>
-		/// Retrieves a static method that returns void and takes the specified parameter types.
-		/// </summary>
-		public static IMethod Action<T1, T2, T3>()
-		{
-			return Action(typeof(T1), typeof(T2), typeof(T3));
-		}
-		
-		/// <summary>
-		/// Retrieves a static method that returns void and takes the specified parameter types.
-		/// </summary>
-		public static IMethod Action<T1, T2, T3, T4>()
-		{
-			return Action(typeof(T1), typeof(T2), typeof(T3), typeof(T4));
-		}
-		
-		/// <summary>
-		/// Retrieves a static method that returns void and takes the specified parameter types.
-		/// </summary>
-		public static IMethod Action(params Type[] paramTypes)
-		{
-			return Action(paramTypes.Select(FromReflection).ToArray());
-		}
-		
-		/// <summary>
-		/// Retrieves a static method that returns void and takes the specified parameter types.
-		/// </summary>
-		public static IMethod Action(params IType[] paramTypes)
-		{
-			return FromReflection(typeof(Actions)).GetMethods(
-				m => m.Name == "Action" && m.TypeParameters.Count == paramTypes.Length && m.Parameters.Count == paramTypes.Length)
-				.Single();
-		}
-	}
-	
-	static class Actions
-	{
-		public static void Action() {}
-		public static void Action<T1>(T1 a1) {}
-		public static void Action<T1, T2>(T1 a1, T2 a2) {}
-		public static void Action<T1, T2, T3>(T1 a1, T2 a2, T3 a3) {}
-		public static void Action<T1, T2, T3, T4>(T1 a1, T2 a2, T3 a3, T4 a4) {}
-	}
-}