diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index df5b865..5c82fa8 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -17,7 +17,10 @@ jobs:
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: ${{ env.DOTNET_VERSION }}
+          dotnet-version: |
+            ${{ env.DOTNET_VERSION }}
+            3.1.x
+            6.0.x
 
       - name: Install dependencies
         run: dotnet restore ${{ env.SOLUTION_FILE }} --verbosity minimal && dotnet tool restore
diff --git a/GrobExp.Compiler.Tests/GrobExp.Compiler.Tests.csproj b/GrobExp.Compiler.Tests/GrobExp.Compiler.Tests.csproj
index 2c7a3a8..96ee0eb 100644
--- a/GrobExp.Compiler.Tests/GrobExp.Compiler.Tests.csproj
+++ b/GrobExp.Compiler.Tests/GrobExp.Compiler.Tests.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <IsPackable>false</IsPackable>
-    <TargetFrameworks>net45;netcoreapp3.1;net8.0</TargetFrameworks>
+    <TargetFrameworks>net45;netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>