diff --git a/src/Build/Tests/StandardTestTools.targets b/src/Build/Tests/StandardTestTools.targets
index e1ede90..9c5799d 100644
--- a/src/Build/Tests/StandardTestTools.targets
+++ b/src/Build/Tests/StandardTestTools.targets
@@ -10,25 +10,25 @@
 
     <!-- The mainstream test tools -->
     <ItemGroup>
-        <PackageReference Include="coverlet.msbuild" Version="3.2.0">
+        <PackageReference Include="coverlet.msbuild" Version="6.0.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-        <PackageReference Include="Moq" Version="4.18.3" />
-        <PackageReference Include="Shouldly" Version="4.1.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Moq" Version="4.20.70" />
+        <PackageReference Include="Shouldly" Version="4.2.1" />
         <PackageReference Include="xunit" Version="2.4.2" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="3.2.0" />
+        <PackageReference Include="coverlet.collector" Version="6.0.0" />
     </ItemGroup>
 
     <!-- Extended test tools.  These aren't necessarily used in all projects, but appear harmless to include. -->
     <ItemGroup>
-        <PackageReference Include="MSTest.TestAdapter" Version="3.0.0" />
-        <PackageReference Include="MSTest.TestFramework" Version="3.0.0" />
+        <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
+        <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     </ItemGroup>
 
 </Project>
\ No newline at end of file
diff --git a/src/Gridwich.Core.EventGrid/tests/Gridwich.Core.EventGridTests.csproj b/src/Gridwich.Core.EventGrid/tests/Gridwich.Core.EventGridTests.csproj
index 9d428d3..a441485 100644
--- a/src/Gridwich.Core.EventGrid/tests/Gridwich.Core.EventGridTests.csproj
+++ b/src/Gridwich.Core.EventGrid/tests/Gridwich.Core.EventGridTests.csproj
@@ -32,7 +32,7 @@
       <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
       <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
       <PackageReference Update="Shouldly" Version="4.2.1" />
-      <PackageReference Update="xunit" Version="2.6.6" />
+      <PackageReference Update="xunit" Version="2.9.0" />
       <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.Core/tests/Gridwich.CoreTests.csproj b/src/Gridwich.Core/tests/Gridwich.CoreTests.csproj
index 9ba4032..dd51cfd 100644
--- a/src/Gridwich.Core/tests/Gridwich.CoreTests.csproj
+++ b/src/Gridwich.Core/tests/Gridwich.CoreTests.csproj
@@ -33,7 +33,7 @@
       <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
       <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
       <PackageReference Update="Shouldly" Version="4.2.1" />
-      <PackageReference Update="xunit" Version="2.6.6" />
+      <PackageReference Update="xunit" Version="2.9.0" />
       <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.Host.FunctionApp/tests/Gridwich.Host.FunctionAppTests.csproj b/src/Gridwich.Host.FunctionApp/tests/Gridwich.Host.FunctionAppTests.csproj
index 65526c9..3581a3e 100644
--- a/src/Gridwich.Host.FunctionApp/tests/Gridwich.Host.FunctionAppTests.csproj
+++ b/src/Gridwich.Host.FunctionApp/tests/Gridwich.Host.FunctionAppTests.csproj
@@ -34,7 +34,7 @@
     <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Update="Shouldly" Version="4.2.1" />
-    <PackageReference Update="xunit" Version="2.6.6" />
+    <PackageReference Update="xunit" Version="2.9.0" />
     <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.SagaParticipants.Analysis.MediaInfo/tests/Gridwich.SagaParticipants.Analysis.MediaInfoTests.csproj b/src/Gridwich.SagaParticipants.Analysis.MediaInfo/tests/Gridwich.SagaParticipants.Analysis.MediaInfoTests.csproj
index a89aa93..3b21957 100644
--- a/src/Gridwich.SagaParticipants.Analysis.MediaInfo/tests/Gridwich.SagaParticipants.Analysis.MediaInfoTests.csproj
+++ b/src/Gridwich.SagaParticipants.Analysis.MediaInfo/tests/Gridwich.SagaParticipants.Analysis.MediaInfoTests.csproj
@@ -33,7 +33,7 @@
       <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
       <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
       <PackageReference Update="Shouldly" Version="4.2.1" />
-      <PackageReference Update="xunit" Version="2.6.6" />
+      <PackageReference Update="xunit" Version="2.9.0" />
       <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.SagaParticipants.Encode.CloudPort/tests/Gridwich.SagaParticipants.Encode.CloudPortTests.csproj b/src/Gridwich.SagaParticipants.Encode.CloudPort/tests/Gridwich.SagaParticipants.Encode.CloudPortTests.csproj
index 3d74d36..279a7bd 100644
--- a/src/Gridwich.SagaParticipants.Encode.CloudPort/tests/Gridwich.SagaParticipants.Encode.CloudPortTests.csproj
+++ b/src/Gridwich.SagaParticipants.Encode.CloudPort/tests/Gridwich.SagaParticipants.Encode.CloudPortTests.csproj
@@ -35,7 +35,7 @@
     <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Update="Shouldly" Version="4.2.1" />
-    <PackageReference Update="xunit" Version="2.6.6" />
+    <PackageReference Update="xunit" Version="2.9.0" />
     <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.SagaParticipants.Encode.Flip/tests/Gridwich.SagaParticipants.Encode.FlipTests.csproj b/src/Gridwich.SagaParticipants.Encode.Flip/tests/Gridwich.SagaParticipants.Encode.FlipTests.csproj
index 9fad55f..b8b0fd3 100644
--- a/src/Gridwich.SagaParticipants.Encode.Flip/tests/Gridwich.SagaParticipants.Encode.FlipTests.csproj
+++ b/src/Gridwich.SagaParticipants.Encode.Flip/tests/Gridwich.SagaParticipants.Encode.FlipTests.csproj
@@ -36,7 +36,7 @@
     <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Update="Shouldly" Version="4.2.1" />
-    <PackageReference Update="xunit" Version="2.6.6" />
+    <PackageReference Update="xunit" Version="2.9.0" />
     <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.SagaParticipants.Encode.TelestreamCloud/tests/Gridwich.SagaParticipants.Encode.TelestreamCloudTests.csproj b/src/Gridwich.SagaParticipants.Encode.TelestreamCloud/tests/Gridwich.SagaParticipants.Encode.TelestreamCloudTests.csproj
index 41731d7..98df0c2 100644
--- a/src/Gridwich.SagaParticipants.Encode.TelestreamCloud/tests/Gridwich.SagaParticipants.Encode.TelestreamCloudTests.csproj
+++ b/src/Gridwich.SagaParticipants.Encode.TelestreamCloud/tests/Gridwich.SagaParticipants.Encode.TelestreamCloudTests.csproj
@@ -37,7 +37,7 @@
     <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Update="Shouldly" Version="4.2.1" />
-    <PackageReference Update="xunit" Version="2.6.6" />
+    <PackageReference Update="xunit" Version="2.9.0" />
     <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Gridwich.SagaParticipants.Storage.AzureStorage/tests/Gridwich.SagaParticipants.Storage.AzureStorageTests.csproj b/src/Gridwich.SagaParticipants.Storage.AzureStorage/tests/Gridwich.SagaParticipants.Storage.AzureStorageTests.csproj
index c24b50e..866b52b 100644
--- a/src/Gridwich.SagaParticipants.Storage.AzureStorage/tests/Gridwich.SagaParticipants.Storage.AzureStorageTests.csproj
+++ b/src/Gridwich.SagaParticipants.Storage.AzureStorage/tests/Gridwich.SagaParticipants.Storage.AzureStorageTests.csproj
@@ -33,7 +33,7 @@
       <PackageReference Update="MSTest.TestAdapter" Version="3.1.1" />
       <PackageReference Update="MSTest.TestFramework" Version="3.1.1" />
       <PackageReference Update="Shouldly" Version="4.2.1" />
-      <PackageReference Update="xunit" Version="2.6.6" />
+      <PackageReference Update="xunit" Version="2.9.0" />
       <PackageReference Update="xunit.runner.visualstudio" Version="2.5.6">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>