diff --git a/Octokit.Tests/Octokit.Tests-Portable.csproj b/Octokit.Tests/Octokit.Tests-Portable.csproj
index eff7111d..0362b293 100644
--- a/Octokit.Tests/Octokit.Tests-Portable.csproj
+++ b/Octokit.Tests/Octokit.Tests-Portable.csproj
@@ -38,7 +38,7 @@
   <ItemGroup>
     <Reference Include="NSubstitute, Version=1.8.0.0, Culture=neutral, PublicKeyToken=92dd2e9066daa5ca, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>../packages/NSubstitute.1.8.0.0/lib/NET40/NSubstitute.dll</HintPath>
+      <HintPath>../packages/NSubstitute.1.8.0.0/lib/net40/NSubstitute.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />