diff --git a/tests/SheepTools.Moq.Test/SheepTools.Moq.Test.csproj b/tests/SheepTools.Moq.Test/SheepTools.Moq.Test.csproj
index 526e8ff..ce82c23 100644
--- a/tests/SheepTools.Moq.Test/SheepTools.Moq.Test.csproj
+++ b/tests/SheepTools.Moq.Test/SheepTools.Moq.Test.csproj
@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/tests/SheepTools.Test/SheepTools.Test.csproj b/tests/SheepTools.Test/SheepTools.Test.csproj
index ba02128..c31497a 100644
--- a/tests/SheepTools.Test/SheepTools.Test.csproj
+++ b/tests/SheepTools.Test/SheepTools.Test.csproj
@@ -9,7 +9,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="Moq" Version="4.16.1" />
     <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/tests/SheepTools.XUnit.Test/SheepTools.XUnit.Test.csproj b/tests/SheepTools.XUnit.Test/SheepTools.XUnit.Test.csproj
index 10ef45a..d645512 100644
--- a/tests/SheepTools.XUnit.Test/SheepTools.XUnit.Test.csproj
+++ b/tests/SheepTools.XUnit.Test/SheepTools.XUnit.Test.csproj
@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>