diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index e2c4aa7..d147902 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -100,17 +100,17 @@ jobs:
       - name: Clear installed dotnet versions
         shell: pwsh
         run: __tests__/clear-installed-dotnet.ps1 ${{ runner.os }}
-      - name: Setup dotnet 5.0.*
+      - name: Setup dotnet 3.1.*
         uses: ./
         with:
-          dotnet-version: 5.0.*
+          dotnet-version: 3.1.*
       - name: Verify dotnet
         if: runner.os != 'windows'
-        run: __tests__/verify-dotnet.sh 5.0
+        run: __tests__/verify-dotnet.sh 3.1
       - name: Verify dotnet (Windows)
         if: runner.os == 'windows'
-        run: __tests__/verify-dotnet.ps1 5.0
-        
+        run: __tests__/verify-dotnet.ps1 3.1
+
   test-proxy:
     runs-on: ubuntu-latest
     container:
diff --git a/__tests__/sample-csproj/sample.csproj b/__tests__/sample-csproj/sample.csproj
index 14942f9..50fb5e4 100644
--- a/__tests__/sample-csproj/sample.csproj
+++ b/__tests__/sample-csproj/sample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;netcoreapp2.2;netcoreapp5.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;netcoreapp2.2</TargetFrameworks>
     <RootNamespace>sample_csproj</RootNamespace>
 
     <IsPackable>false</IsPackable>