fix NUnit reference, closes #37
diff --git a/tests/src/log4net.Tests.vs2012.csproj b/tests/src/log4net.Tests.vs2012.csproj
index 79f92c7..633afd2 100644
--- a/tests/src/log4net.Tests.vs2012.csproj
+++ b/tests/src/log4net.Tests.vs2012.csproj
@@ -108,9 +108,9 @@
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="nunit.framework, Version=2.5.2.9222, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\..\ibatisnet-3\External-Bin\Net\2.0\nunit.framework.dll</HintPath>
+    <Reference Include="nunit.framework, Version=2.6.4.14350, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77, processorArchitecture=MSIL">
+      <HintPath>..\..\src\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="System">
       <Name>System</Name>
@@ -239,9 +239,6 @@
     </BootstrapperPackage>
   </ItemGroup>
   <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
-  <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
   <ItemGroup>
@@ -250,6 +247,9 @@
       <Name>log4net.vs2012</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent>