diff --git a/src/Castle.MonoRail.Views.Spark.Tests/Castle.MonoRail.Views.Spark.Tests.csproj b/src/Castle.MonoRail.Views.Spark.Tests/Castle.MonoRail.Views.Spark.Tests.csproj
index 2ac78745..779bb8fc 100644
--- a/src/Castle.MonoRail.Views.Spark.Tests/Castle.MonoRail.Views.Spark.Tests.csproj
+++ b/src/Castle.MonoRail.Views.Spark.Tests/Castle.MonoRail.Views.Spark.Tests.csproj
@@ -28,6 +28,7 @@
     <Reference Include="System.Web" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
 	<PackageReference Include="NUnit" Version="3.14.0" />
 	<PackageReference Include="NUnit.Console" Version="3.16.3" />
 	<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
diff --git a/src/Spark.Python.Tests/Spark.Python.Tests.csproj b/src/Spark.Python.Tests/Spark.Python.Tests.csproj
index dabe7593..d05dcf03 100644
--- a/src/Spark.Python.Tests/Spark.Python.Tests.csproj
+++ b/src/Spark.Python.Tests/Spark.Python.Tests.csproj
@@ -20,7 +20,8 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
-	<PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="NUnit" Version="3.14.0" />
 	<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/Spark.Ruby.Tests/Spark.Ruby.Tests.csproj b/src/Spark.Ruby.Tests/Spark.Ruby.Tests.csproj
index 04459c71..7199cc3b 100644
--- a/src/Spark.Ruby.Tests/Spark.Ruby.Tests.csproj
+++ b/src/Spark.Ruby.Tests/Spark.Ruby.Tests.csproj
@@ -24,7 +24,8 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
-	<PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="NUnit" Version="3.14.0" />
 	<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/Spark.Tests/Spark.Tests.csproj b/src/Spark.Tests/Spark.Tests.csproj
index 6c2549ee..045b38d3 100644
--- a/src/Spark.Tests/Spark.Tests.csproj
+++ b/src/Spark.Tests/Spark.Tests.csproj
@@ -15,7 +15,8 @@
     <Reference Include="System.Web" />
   </ItemGroup>
   <ItemGroup>
-	<PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="NUnit" Version="3.14.0" />
 	<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
 	<PackageReference Include="Shouldly" Version="4.2.1" />
 	<PackageReference Include="RhinoMocks" Version="3.6.1" />
diff --git a/src/Spark.Web.Mvc.Pdf.Tests/Spark.Web.Mvc.Pdf.Tests.csproj b/src/Spark.Web.Mvc.Pdf.Tests/Spark.Web.Mvc.Pdf.Tests.csproj
index 5adfdc1a..33f50209 100644
--- a/src/Spark.Web.Mvc.Pdf.Tests/Spark.Web.Mvc.Pdf.Tests.csproj
+++ b/src/Spark.Web.Mvc.Pdf.Tests/Spark.Web.Mvc.Pdf.Tests.csproj
@@ -13,6 +13,7 @@
   <ItemGroup>
 	<PackageReference Include="Microsoft.AspNet.Mvc" Version="5.3.0" />
 	<PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
 	<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
 	<PackageReference Include="RhinoMocks" Version="3.6.1" />
   </ItemGroup>
diff --git a/src/Spark.Web.Mvc.Ruby.Tests/Spark.Web.Mvc.Ruby.Tests.csproj b/src/Spark.Web.Mvc.Ruby.Tests/Spark.Web.Mvc.Ruby.Tests.csproj
index 23253f1a..ec9c043a 100644
--- a/src/Spark.Web.Mvc.Ruby.Tests/Spark.Web.Mvc.Ruby.Tests.csproj
+++ b/src/Spark.Web.Mvc.Ruby.Tests/Spark.Web.Mvc.Ruby.Tests.csproj
@@ -15,6 +15,7 @@
     <Reference Include="System.Web" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <ProjectReference Include="..\Spark.Web.Mvc.Ruby\Spark.Web.Mvc.Ruby.csproj" />
diff --git a/src/Spark.Web.Mvc.Tests/Spark.Web.Mvc.Tests.csproj b/src/Spark.Web.Mvc.Tests/Spark.Web.Mvc.Tests.csproj
index 5671e1c3..7988669e 100644
--- a/src/Spark.Web.Mvc.Tests/Spark.Web.Mvc.Tests.csproj
+++ b/src/Spark.Web.Mvc.Tests/Spark.Web.Mvc.Tests.csproj
@@ -11,7 +11,8 @@
     <Reference Include="System.Web" />
   </ItemGroup>
   <ItemGroup>
-	<PackageReference Include="Microsoft.AspNet.Mvc" Version="5.3.0" />
+    <PackageReference Include="Microsoft.AspNet.Mvc" Version="5.3.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
 	<PackageReference Include="RhinoMocks" Version="3.6.1" />
 	<PackageReference Include="NUnit" Version="3.14.0" />
   </ItemGroup>
diff --git a/src/Spark.Web.Tests/Spark.Web.Tests.csproj b/src/Spark.Web.Tests/Spark.Web.Tests.csproj
index d71bda42..ee28d7ee 100644
--- a/src/Spark.Web.Tests/Spark.Web.Tests.csproj
+++ b/src/Spark.Web.Tests/Spark.Web.Tests.csproj
@@ -17,6 +17,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />
 	<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
 	<PackageReference Include="Shouldly" Version="4.2.1" />