diff --git a/TestHelpers.Tests/TestHelpers.Tests.csproj b/TestHelpers.Tests/TestHelpers.Tests.csproj
index e30c6b9ea..7440a684b 100644
--- a/TestHelpers.Tests/TestHelpers.Tests.csproj
+++ b/TestHelpers.Tests/TestHelpers.Tests.csproj
@@ -11,6 +11,7 @@
     <Authors>Tatham Oddie</Authors>
     <RootNamespace>System.IO.Abstractions.TestingHelpers.Tests</RootNamespace>
     <AssemblyOriginatorKeyFile>../StrongName.pfx</AssemblyOriginatorKeyFile>
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/appveyor.yml b/appveyor.yml
index c6f042fed..f27800a64 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -22,6 +22,6 @@ deploy:
   api_key:
     secure: lUmSV95QwsQtvPkHT02PT5fswmVcW0oMIJvOGEincUNnUNtTe3DOIjVEOpC0CMkQ
   skip_symbols: false
-  artifact: '**\System.IO.Abstractions.*.nupkg'
+  artifact: /.*\.nupkg/
   on:
     branch: master