diff --git a/tests/Directory.Build.props b/tests/Directory.Build.props
index 8621b71..451adf2 100644
--- a/tests/Directory.Build.props
+++ b/tests/Directory.Build.props
@@ -10,6 +10,10 @@
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
   <ItemGroup>
     <AssemblyAttribute Include="System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage" />
   </ItemGroup>