diff --git a/dotnet/tests/tests.csproj b/dotnet/tests/tests.csproj
index ecaf4e89..b9cfb241 100644
--- a/dotnet/tests/tests.csproj
+++ b/dotnet/tests/tests.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -37,11 +37,8 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="packages.config" />
+    <PackageReference Include="NUnit">
+      <Version>3.5.0</Version>
+    </PackageReference>
   </ItemGroup>
-  <ItemGroup>
-    <Reference Include="nunit.framework">
-      <HintPath>..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
-    </Reference>
-  </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>