diff --git a/src/Tests/Finos.Fdc3.AppDirectory.Tests/Finos.Fdc3.AppDirectory.Tests.csproj b/src/Tests/Finos.Fdc3.AppDirectory.Tests/Finos.Fdc3.AppDirectory.Tests.csproj
index b67418a..b3741be 100644
--- a/src/Tests/Finos.Fdc3.AppDirectory.Tests/Finos.Fdc3.AppDirectory.Tests.csproj
+++ b/src/Tests/Finos.Fdc3.AppDirectory.Tests/Finos.Fdc3.AppDirectory.Tests.csproj
@@ -19,7 +19,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
     <PackageReference Include="xunit" Version="2.9.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Tests/Finos.Fdc3.NewtonsoftJson.Tests/Finos.Fdc3.NewtonsoftJson.Tests.csproj b/src/Tests/Finos.Fdc3.NewtonsoftJson.Tests/Finos.Fdc3.NewtonsoftJson.Tests.csproj
index 0194a03..71a0f07 100644
--- a/src/Tests/Finos.Fdc3.NewtonsoftJson.Tests/Finos.Fdc3.NewtonsoftJson.Tests.csproj
+++ b/src/Tests/Finos.Fdc3.NewtonsoftJson.Tests/Finos.Fdc3.NewtonsoftJson.Tests.csproj
@@ -19,7 +19,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
         <PackageReference Include="Newtonsoft.Json.Schema" Version="3.0.14" />
         <PackageReference Include="xunit" Version="2.9.0" />
diff --git a/src/Tests/Finos.Fdc3.SystemTextJson.Tests/Finos.Fdc3.SystemTextJson.Tests.csproj b/src/Tests/Finos.Fdc3.SystemTextJson.Tests/Finos.Fdc3.SystemTextJson.Tests.csproj
index 65fe18c..de0d171 100644
--- a/src/Tests/Finos.Fdc3.SystemTextJson.Tests/Finos.Fdc3.SystemTextJson.Tests.csproj
+++ b/src/Tests/Finos.Fdc3.SystemTextJson.Tests/Finos.Fdc3.SystemTextJson.Tests.csproj
@@ -15,7 +15,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
     <PackageReference Include="xunit" Version="2.9.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Tests/Finos.Fdc3.Tests/Finos.Fdc3.Tests.csproj b/src/Tests/Finos.Fdc3.Tests/Finos.Fdc3.Tests.csproj
index 755909d..456ed7a 100644
--- a/src/Tests/Finos.Fdc3.Tests/Finos.Fdc3.Tests.csproj
+++ b/src/Tests/Finos.Fdc3.Tests/Finos.Fdc3.Tests.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
     <PackageReference Include="xunit" Version="2.9.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>