diff --git a/test/Directory.Build.props b/test/Directory.Build.props
index 3195996b01..1959f027d0 100644
--- a/test/Directory.Build.props
+++ b/test/Directory.Build.props
@@ -6,11 +6,16 @@
     <Platforms>AnyCPU</Platforms>
   </PropertyGroup>
 
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp2.0' ">
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp2.0'">
     <DefineConstants>$(DefineConstants);CORE</DefineConstants>
     <RuntimeFrameworkVersion>2.0.5</RuntimeFrameworkVersion>
   </PropertyGroup>
 
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.1'">
+    <DefineConstants>$(DefineConstants);CORE</DefineConstants>
+    <RuntimeFrameworkVersion>3.1.2</RuntimeFrameworkVersion>
+  </PropertyGroup>
+
   <PropertyGroup Condition=" '$(Configuration)' == 'MonoRelease' ">
     <DefineConstants>$(DefineConstants);MONO</DefineConstants>
   </PropertyGroup>