diff --git a/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj b/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj
index 959d8e8e2b..ac727dda4c 100644
--- a/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj
+++ b/tests/Avalonia.Base.UnitTests/Avalonia.Base.UnitTests.csproj
@@ -90,6 +90,7 @@
     <Otherwise />
   </Choose>
   <ItemGroup>
+    <Compile Include="AvaloniaObjectTests_DataValidation.cs" />
     <Compile Include="Collections\CollectionChangedTracker.cs" />
     <Compile Include="Collections\AvaloniaDictionaryTests.cs" />
     <Compile Include="Collections\AvaloniaListTests.cs" />