diff --git a/test/Directory.Build.targets b/test/Directory.Build.targets
index 7e8c8d0b..fbccc406 100644
--- a/test/Directory.Build.targets
+++ b/test/Directory.Build.targets
@@ -15,7 +15,7 @@
   <ItemGroup>
     <!-- Due to license change of FluentAssertions, lock to v7 -->
     <PackageReference Include="FluentAssertions" Version="[7.2,8.0)" />
-    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="NSubstitute" Version="6.1.0" />
     <PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.17">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>