diff --git a/test/Directory.Build.targets b/test/Directory.Build.targets
index 2bea1ec..e4d2dff 100644
--- a/test/Directory.Build.targets
+++ b/test/Directory.Build.targets
@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="7.2.0" />
-    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="NSubstitute" Version="6.0.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <!-- Prevent Verify/DiffEngine/EmptyFiles from creating excessive files in output folder, when we don't need them. -->
     <PackageReference Include="EmptyFiles" Version="8.17.1" ExcludeAssets="buildTransitive" />