diff --git a/NuGet.config b/NuGet.config
new file mode 100644
index 00000000..548d0dca
--- /dev/null
+++ b/NuGet.config
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+    <add key="feedz.io/xunit/xunit" value="https://f.feedz.io/xunit/xunit/nuget/index.json" protocolVersion="3" />
+  </packageSources>
+</configuration>
\ No newline at end of file
diff --git a/tests/NetVips.Tests/NetVips.Tests.csproj b/tests/NetVips.Tests/NetVips.Tests.csproj
index 2638be4c..d35d1f17 100644
--- a/tests/NetVips.Tests/NetVips.Tests.csproj
+++ b/tests/NetVips.Tests/NetVips.Tests.csproj
@@ -23,7 +23,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" Condition="'$(MSBuildRuntimeType)' == 'Mono'" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
-    <PackageReference Include="xunit" Version="2.8.0" />
+    <PackageReference Include="xunit" Version="2.8.1-pre.9" />
     <PackageReference Include="Xunit.SkippableFact" Version="1.4.13" />
   </ItemGroup>
 
@@ -34,7 +34,7 @@
 
   <ItemGroup Condition="'$(MSBuildRuntimeType)' != 'Mono'">
     <PackageReference Include="NetVips.Native" Version="8.15.2" Condition="'$(TestWithNuGetBinaries)' == 'true'" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1-pre.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>