diff --git a/X10D.Tests/X10D.Tests.csproj b/X10D.Tests/X10D.Tests.csproj
index 41dc0ed..4cb6e66 100644
--- a/X10D.Tests/X10D.Tests.csproj
+++ b/X10D.Tests/X10D.Tests.csproj
@@ -3,6 +3,7 @@
     <PropertyGroup>
         <TargetFramework>netcoreapp3.1</TargetFramework>
         <IsPackable>false</IsPackable>
+        <CodeAnalysisRuleSet>..\X10D.ruleset</CodeAnalysisRuleSet>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/X10D/X10D.csproj b/X10D/X10D.csproj
index 5de2fea..c5c7ac4 100644
--- a/X10D/X10D.csproj
+++ b/X10D/X10D.csproj
@@ -14,6 +14,7 @@
         <PackageIconUrl />
         <PackageTags>dotnet extension-methods</PackageTags>
         <Version>2.1.0</Version>
+        <CodeAnalysisRuleSet>..\X10D.ruleset</CodeAnalysisRuleSet>
     </PropertyGroup>
 
     <ItemGroup>