diff --git a/tests/Avalonia.Headless.NUnit.PerAssembly.UnitTests/Avalonia.Headless.NUnit.PerAssembly.UnitTests.csproj b/tests/Avalonia.Headless.NUnit.PerAssembly.UnitTests/Avalonia.Headless.NUnit.PerAssembly.UnitTests.csproj
index a701fcefe8..2a2ad17626 100644
--- a/tests/Avalonia.Headless.NUnit.PerAssembly.UnitTests/Avalonia.Headless.NUnit.PerAssembly.UnitTests.csproj
+++ b/tests/Avalonia.Headless.NUnit.PerAssembly.UnitTests/Avalonia.Headless.NUnit.PerAssembly.UnitTests.csproj
@@ -15,7 +15,8 @@
 
   <ItemGroup>
     <PackageReference Include="NUnit" Version="4.4.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="6.0.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/tests/Avalonia.Headless.NUnit.PerTest.UnitTests/Avalonia.Headless.NUnit.PerTest.UnitTests.csproj b/tests/Avalonia.Headless.NUnit.PerTest.UnitTests/Avalonia.Headless.NUnit.PerTest.UnitTests.csproj
index a701fcefe8..2a2ad17626 100644
--- a/tests/Avalonia.Headless.NUnit.PerTest.UnitTests/Avalonia.Headless.NUnit.PerTest.UnitTests.csproj
+++ b/tests/Avalonia.Headless.NUnit.PerTest.UnitTests/Avalonia.Headless.NUnit.PerTest.UnitTests.csproj
@@ -15,7 +15,8 @@
 
   <ItemGroup>
     <PackageReference Include="NUnit" Version="4.4.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="6.0.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
   </ItemGroup>
 
   <ItemGroup>